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SMB239
Programmable Linear Battery Charger in 1.3 x 2.1 uCSPTM
FEATURES & APPLICATIONS
* World's smallest linear charger * Linear charging for reduced board space * * * *
o o Up to 525mA charge current Stable with small ceramic capacitors
INTRODUCTION
The SMB239 is a programmable single-cell lithium-ion/lithium-polymer battery charger for a variety of portable applications. The device provides a simple way to charge low- and medium-capacity Li-Ion or Li-Polymer batteries via a USB port or an AC port. Unlike conventional devices, the SMB239's very small package and high level of configurability simplify design in a wide range of handheld equipment. Charge control includes qualification, trickle-charge, pre-charge, constant current/constant voltage, and termination/safety settings that are fully programmable via a serial I2C/SMBus making the device truly a flexible solution. Pre-charge, fast charge and termination current levels can be set via I2C commands. The SMB239 offers the option to automatically recharge the battery upon power cycling, only when battery voltage falls 220/390/550mV below the selectable float voltage. This allows for a reduced number of charge/discharge cycles, thereby extending battery life. The SMB239 offers a wide variety of features that protect the battery pack as well as the charger and input circuitry: over-current, underand over-voltage, and thermal protection. Ultra-precise, 1% accurate, float voltage control improves battery capacity utilization. Status can be monitored via the serial port for charge state and fault conditions. In addition, one LED driver output can be used to signal charge status. As a protection mechanism, when the junction temperature approaches approximately 110C, the SMB239 will start to reduce charge current to ensure device and system reliability, while charging the battery cell as fast as possible. The SMB239 is available in a space-saving, 1.3mm x 2.1mm uCSPTM package with lead-free balls and is rated over the -30C to +85C temperature range.
4.35 to 6.5V input voltage range Small 1.3 x 2.1 uCSPTM package (0.5mm pitch) High-accuracy output voltage regulation: 1% Low reverse leakage current * Digital programming of all major parameters via I2C interface and lockable non-volatile memory
o o o o o Battery voltage set point Pre-charge, fast charge, termination current Fast charge voltage threshold Temperature limits Charge safety timers Automatic restart threshold
o * Fault/Status indicator * Wide range of protection features
o o o
Thermal regulation Battery pack temperature monitor Input/output over-voltage lockout
* * * * * *
Applications
Bluetooth & Stereo Headsets Noise Cancellation Headphones Wireless Handsets MP3 Players Wrist PDA/Watches Handheld Equipment
SIMPLIFIED APPLICATIONS DRAWING
4.35V to 6.5V 10V Tolerance IN
4.7uF
SMB239 OUT
BATT
Up to 525mA Charge Current
Battery OVLO
4.7uF
1-cell Li+ Battery
RLIM
I2C Communication SCL SDA GND
THERM
RED LED
STAT
Figure 1 - Applications block diagram featuring the SMB239 programmable linear battery charger.
(c) SUMMIT Microelectronics, Inc. 2005 * 757 N. Mary Avenue * Sunnyvale CA 94085 * Phone 408 523-1000 * FAX 408 523-1266
http://www.summitmicro.com/
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SMB239
GENERAL DESCRIPTION
The SMB239 is a fully programmable, linear battery charger for single-cell Li-Ion and Li-Polymer battery packs. The device's simple, linear-mode operation and ultra-small package significantly reduce component count and required board space. The SMB239 provides four main charging phases: trickle-charge, preconditioning (pre-charge), constant current and constant voltage. The overall system accuracy of the SMB239 is 1%, allowing for a higher capacity utilization versus other conventional solutions. When a battery or an external supply is inserted the SMB239 performs the pre-qualification checks before initiating a charging cycle. The input voltage needs to be higher than the UVLO threshold for the charging cycle to start. As soon as the input supply is removed, the SMB239 enters a shutdown mode, thereby saving battery power. A programmable option also exists that 2 allows the user to prevent battery charging until an I C command has been issued. If the battery voltage is below 2.0V (trickle-charge to precharge threshold), the device will apply a trickle-charge current of 10mA (typical). This allows the SMB239 to reset the protection circuit in the battery pack and bring the battery voltage to a higher level without compromising safety. Once the battery voltage crosses the 2.0V threshold, the SMB239 enters the pre-charge mode. This mode replenishes deeply depleted cells and minimizes heat dissipation during the initial charge cycle. The preconditioning current is programmable, with the default value at C/10. If the battery voltage does not reach the preconditioning voltage level (programmable) within a specified amount of time (pre-charge timeout), the safety timer expires and the charge cycle is terminated. When the battery voltage reaches the pre-charge to fastcharge voltage level, the SMB239 enters the constant current (fast charge) mode. The fast charge current level is programmable via the corresponding register. Once the final float voltage (programmable) has been reached, the battery charger will enter a constant voltage mode in which the battery voltage is kept constant, allowing the charge current to gradually taper off. The constant-voltage charging mode will continue until the charge current drops below the termination current threshold, or until the fast charge timer has expires. The termination current threshold is programmable. After the charge cycle has terminated, the SMB239 continues to monitor the battery voltage. If the battery voltage falls below the recharge threshold (typically 115mV below float voltage), the SMB239 can automatically top-off the battery. An option exists for preventing charging initiation upon power cycling unless the battery voltage is 220mV, 390mV or 550mV (VCH) below the float voltage level. This prevents over-stressing of the battery via continuous charging cycles in systems with short run times and frequent power cycling (IN power connect/disconnect). A wide range of protection features is also included in the SMB239. These include input and output (battery) over-voltage protection, battery missing detector and thermal monitor for continuous cell temperature monitoring and pre-qualification. The following charging parameters can be adjusted dynamically via the I2C interface, for optimizing battery management real-time. These parameters can also be programmed statically via a user-friendly GUI interface: * * * * * * Battery (float) voltage Fast charge current Pre-conditioning voltage threshold Pre-conditioning charge current Termination current Temperature window Safety charge timers.
*
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SMB239
INTERNAL BLOCK DIAGRAM
EEPROM SDA SCL
Registers
Interface
Charge Control
IN BATT
Prog. Float Voltage Internal Temperature Limit
Control
WELL Control
OUT VDDCAP
Prog. Cold Limit Programmable Current THERM
Prog. Hot Limit
Figure 2 - Internal block diagram of the SMB239 programmable linear battery charger.
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SMB239
PRODUCTION PACKAGE AND PIN DESCRIPTIONS
Pin/Ball Number A1 B1 C1 D1 A2 B2 C2 D2 Pin Name BATT GND STAT IN THERM SDA SCL OUT Pin Type Input Ground Output Input Input Input/Output Input Output Pin Description Battery Voltage Sense - Connect directly to positive terminal of battery and bypass with a 4.7uF or greater capacitor. Ground - Connect to isolated PCB ground. Status Indicator. Voltage Input (+4.35V to +6.5V) - Bypass with a 4.7uF or greater capacitor. Battery Thermistor Sense. I2C Bus Data. I2C Bus Clock. Charge Current Output.
A1
A2
SMB239
B1 B2
lead-free CSP-8
C1 C2
1.3mm x 2.1mm
D1 D2
0.5mm pitch
Bottom View (Balls facing up)
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SMB239
ENGINEERING PACKAGE AND PIN DESCRIPTIONS
Pin Number 1 3, 8, 18, 20, 22, 30, 32, 33 10 12 29 21 19 14 Pin Name BATT GND STAT IN THERM SDA SCL OUT Pin Type Input Ground Output Input Input Input/Output Input Output Pin Description Battery Voltage Sense - Connect directly to positive terminal of battery and bypass with a 4.7uF or greater capacitor. Ground - Connect to isolated PCB ground. Status Indicator. Voltage Input (+4.35V to +6.5V) - Bypass with a 4.7uF or greater capacitor. Battery Thermistor Sense. I2C Bus Data. I2C Bus Clock. Charge Current Output.
32
31
30
29
28
27
26
25
1 2 3 4 5 6 7 8
24 23
SMB239 5mm x 5mm QFN-32 FOR ENGINEERING SAMPLES ONLY
22 21 20 19 18 17
9
10
11
12
13
14
15
16
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SMB239
ABSOLUTE MAXIMUM RATINGS Temperature Under Bias ....................... -55C to 155C Storage Temperature............................. -55C to 125C Terminal Voltage with Respect to GND: VIN ................................................... -0.3V to +10V All Others ..............................................-0.3V to 6V Output Short Circuit Current ............................... 100mA Lead Solder Temperature (10 s)...........................300C Junction Temperature........................................150C HBM ESD Rating per JEDEC..........................4000V MM ESD Rating per JEDEC.............................200V CDM ESD Rating per JEDEC..........................1000V Latch-Up testing per JEDEC........................100mA
Note: The device is not guaranteed to function outside its operating rating. Stresses listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions outside those listed in the operational sections of the specification is not implied. Exposure to any absolute maximum rating for extended periods may affect device performance and reliability. Devices are ESD sensitive. Handling precautions are recommended.
RECOMMENDED OPERATING CONDITIONS Industrial Temperature Range ......... ...-30C to +85C VIN ..........................................................+4.35V to +6.5V Package Thermal Resistance (JA) uCSPTM-8..................................................68C/W
Note: measured on a 2" x 2", 4-layer PCB with a copper weight of 1oz for each of the top, PWR, GND, and bottom layer.
RELIABILITY CHARACTERISTICS Data Retention.....................................100 Years Endurance...................................100,000 Cycles
DC OPERATING CHARACTERISTICS
TA= -30C to +85C, VIN = +5.0V, VFLOAT = +4.2V unless otherwise noted. All voltages are relative to GND.
Symbol
General
VIN VUVLO VUVLO-HYS VOVLO VVOB VASHDN IIN-ACTIVE IIN-DISABLE ILK TREG
Parameter
Input supply voltage Under-voltage lockout voltage Under-voltage lockout hysteresis Input over-voltage lockout voltage Battery over-voltage lockout voltage Automatic shutdown threshold voltage Active supply current Disable supply current Reverse leakage current Thermal regulation temperature
Conditions
VFLT = 4.2V VFLT = 4.2V VFLT = 4.2V
Min
+4.35
Typ
Max
+6.5
Unit
V V mV V V mV mA mA
+3.5 10 +7.0
VFLT+0.1
VIN - VBATT Input voltage present VIN < VBATT, T=0oC to +70oC
130 0.7 0.7 2 110
A
o
C
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SMB239
DC OPERATING CHARACTERISTICS (CONTINUED)
TA= -30C to +85C, VIN = +5.0V, VFLOAT = +4.2V unless otherwise noted. All voltages are relative to GND.
Symbol
VIL VIH VOL ISINK VTRICKLECHG ITRICKLECHG VPRECHG IPRECHG IPRECHG ICHG ICHG VFLT VFLT VDO ITERM ITERM VRECH VCH ITHERM ITHERM THI TLO
Parameter
Input Low Level Input High Level SDA/STAT Output Low Level STAT sink current Trickle-charge to pre-charge voltage threshold Nominal trickle-charge current Pre-charge to fast-charge voltage threshold Nominal pre-charge current range Pre-charge current tolerance Nominal Fast charge current range Fast charge current tolerance Float voltage range Float voltage tolerance Dropout voltage Charge termination current range Termination current tolerance Recharge threshold voltage Charge threshold voltage range after power applied Thermistor current Thermistor current tolerance Charge cutoff temp (high) Charge cutoff temp (low)
Conditions
Min
Typ
Max
600
Unit
mV V mV mA
Logic Inputs/Output
1.4 ISINK=3mA VOL = 0.4V 300 5
Battery Charger
2.0 VBATT = 1.5V 100mV steps 16 steps IPRECHG = 100mA, T=0oC to +70oC 16 steps ICHG = 525mA, T=0oC to +70oC 20mV steps T=+10oC to +50oC, VFLT = 4.2V ICHG =100mA 16 steps ITERM =55mA, T=0oC to +70oC 3 steps, VBATT < VFLT - VCH 3 settings ITHERM=100A, T=0 C to +70oC Adjustable, conditions per typical application Adjustable, conditions per typical application
o
V mA 3.100 212.5 V mA mA mA mA V % mV 250 mA mA mV 550 100 mV A A
o
10 2.400 25 75 47.5 495 4.020 -1 55 25 35 220 10 90 30 -20 100 55 115 525 100
125 525 560 4.400 +1
70
110 65 15
C C
o
Note 1: Voltage and current accuracies are only guaranteed for factory-programmed settings. Changing the output voltage from that reflected in the customer specific CSIR code will result in inaccuracies exceeding those specified above. Note 2: The SMB239 device is not intended to function as a battery pack protector. Battery packs used in conjunction with this device need to provide adequate internal protection and to comply with the corresponding battery pack specifications.
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SMB239
AC OPERATING CHARACTERISTICS
TA= -30C to +85C, VIN = +5.0V, VFLOAT = +4.2V unless otherwise noted. All voltages are relative to GND.
Symbol
tSTART tGLITCH tHOLDOFF
Parameter
Start-up time Glitch filter Hold-off time
Conditions
Disabled Enabled Short Long tFCTO = 350min tFCTO = 699min tFCTO = 2398min tPCTO = 44min
Min
Typ
20 0 250
Max
Unit
msec msec msec msec msec %
0 256 -15 tFCTO
1
tFCTO
Fast-charge Timeout
+15
tPCTO
Pre-charge Timeout
tPCTO = 87min tPCTO = 175min
-15
tPCTO
+15
%
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SMB239
CHARGING ALGORITHM
SMB239 Programmable Charging Algorithm
0.7 0.6
Charge Current (A)
0.5 0.4 0.3 0.2 0.1 0
Pre-charge VbatCharge termination Iterm (prog)
Taper-charge Vbat=Vfloat (prog)
2. 15
2. 60
3. 00
3. 82
2. 00
3. 32
3. 59
4. 01
4. 14
4. 19
1. 80
4. 20
1. 60
Battery Voltage (V)
Figure 3 - SMB239 Programmable Charging Algorithm)
4. 20
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SMB239
I2C-2 WIRE SERIAL INTERFACE AC OPERATING CHARACTERISTICS - 400 kHz
TA= 0C to +70C, VIN = +5.0V, VFLOAT = +4.2V unless otherwise noted. All voltages are relative to GND. 400kHz
Symbol
fSCL TLOW THIGH tBUF tSU:STA tHD:STA tSU:STO tAA tRDH tR tF tSU:DAT tHD:DAT TI tWR_CONFIG tWR_EE
Description
Conditions
Min 0 1.3 0.6
Typ
Max 400
Units kHz s s s s s s
SCL clock frequency Clock low period Clock high period Bus free time between a STOP and a START condition Start condition setup time Start condition hold time Stop condition setup time Clock edge to data valid Data output hold time SCL and SDA rise time SCL and SDA fall time Data in setup time Data in hold time Noise filter SCL and SDA Write cycle time config Write cycle time EE Noise suppression Configuration registers Memory array SCL low to valid SDA (cycle n) SCL low (cycle n+1) to SDA change Note 3 Note 3 Before new transmission - Note 3
1.3 0.6 0.6 0.6 0.2 0.2 20 + 0.1Cb 20 + 0.1Cb 100 0 140 10 5 0.9 300 300 0.9
s s ns ns ns s ns ms ms
Note 3: Guaranteed by Design.
I2C TIMING DIAGRAMS
tR SCL tSU:STA SDA (IN) tAA SDA (OUT)
tF tHD:STA
tHIGH tHD:DAT
tWR (For Write Operation Only) tLOW tSU:DAT tDH tSU:STO tBUF
Figure 4 - I2C Timing Diagrams
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SMB239
APPLICATIONS INFORMATION
DEVICE OPERATION The SMB239 is a fully programmable battery charger for single-cell Li-Ion and Li-Polymer battery packs. The device's simple, linear-mode operation and ultra-small package significantly reduce component count and required board space. The SMB239 provides four main charging phases: trickle-charge, pre-conditioning (precharge), constant (fast-charge) current and constant voltage. The overall system accuracy of the SMB239 is 1%, allowing for a higher capacity utilization versus other conventional solutions. The main battery charging parameters are programmable, allowing for high design flexibility and sophisticated battery management. Furthermore, the SMB239 offers many advanced protection features, allowing applications to meet strict safety standards without the need for additional cost and components. Power Supply The SMB239 can be powered from an input voltage between +4.35 and +6.5 Volts applied between the IN pin and ground. The voltage on the IN pin is monitored by an Under-Voltage (UVLO) circuit, which prevents the charger from turning on when the voltage at this node is less than the UVLO threshold (+3.5V). The IN pin also supplies an internal +2.5V VDD regulator, which is used as an internal VDD supply. When the input supply is removed, the SMB239 enters a low-power shutdown mode, exhibiting a very low discharge leakage current (2A), thereby extending battery life. Pre-qualification Mode When an external wall adaptor or another type of power source is connected, the SMB239 performs a series of pre-qualification tests before initiating the first charge cycle. The input voltage level needs to be higher than the UVLO threshold, and 130mV greater than the battery voltage; and the appropriate I2C command (enable/disable) needs to be asserted. The prequalification parameters are continuously monitored and charge cycle is suspended when one of them is outside the limits. A device option exists (controlled by register 08h[5]) for preventing charging initiation upon power cycling unless the battery voltage is 200mV, 390mV or 550mV (VCH) below the float voltage level. This prevents overstressing of the battery via continuous charging cycles in systems with short run times and frequent power cycling (IN power connect/disconnect). Trickle-charge Mode Once all pre-qualification conditions are met, the device checks the battery voltage to decide if trickle-charging is required. If the battery voltage is below approximately 2.0V, a charging current of 10mA (typical) is applied on the battery cell. This allows the SMB239 to reset the protection circuit in the battery pack and bring the battery voltage to a higher level without compromising safety. Pre-charge Mode Once the battery voltage crosses the 2.0V level, the SMB239 pre-charges the battery to safely charge the deeply discharged cells (Figure 3). The pre-charge (pre-conditioning) current is programmable from 25mA to 212.5mA (Register 00h). The SMB239 remains in this mode until the battery voltage reaches the precharge to fast-charge voltage threshold (programmable from +2.4V to +3.1V in 100mV steps). If the pre-charge to fast-charge voltage threshold is not exceeded before the pre-charge timer expires, the charge cycle is terminated and a corresponding timeout fault signal is asserted ("Pre-charge Timeout" in register 36h). Constant Current Mode When the battery voltage exceeds the pre-charge to fast-charge voltage threshold, the device enters the constant current (fast charge) mode. During this mode, the fast charge current level is set by the corresponding register. The fast charge current is programmable from 47.5mA to 525mA (Register 00h). Constant Voltage Mode When the battery voltage reaches the pre-defined float voltage, the fast-charge current starts diminishing. The float voltage is programmable from +4.020V to +4.40V in 20mV steps and is 1% accurate over the +10C to +50C temperature range. The higher float voltage settings of the SMB239 enable the charging of modern battery packs with a required float voltage of 4.3V, and 4.4V. Furthermore, the ability to dynamically adjust the float voltage allows the implementation of sophisticated battery charging and control algorithms. Charge Completion The charge cycle is considered complete when the charge current reaches the programmed termination current threshold. The termination current is programmable from 25mA to 250mA (Register 01h). If the termination current threshold is not met before the fast-charge timer expires, the charge cycle is terminated and a corresponding timeout fault signal is asserted ("Fast-charge Timeout" in register 36h).
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SMB239
APPLICATIONS INFORMATION (CONTINUED)
Automatic Battery Recharge The SMB239 allows the battery to be automatically recharged (topped off) when the battery voltage falls by a value of VRECH (115mV typical) below the programmed float voltage. Provided that the input power supply is still present, charging remains enabled (I2C command) and all the pre-qualification parameters are still met, a new charging cycle will be initiated. This ensures that the battery capacity remains high, without the need to manually re-start a charging cycle. The automatic battery recharging can be disabled if not required by the application (Register 03h). USB500/100 USB500/100 allows the user to select a maximum fast charge current of 87mA or 525mA. The USB500/100 functionality is controlled over the I2C interface, allowing for full software control of charge current levels. This function is accomplished via register 31 bit 3, when Register 7 bit 0 is programmed high. When the USB500 mode is selected, the charge current level may be as high as 525mA. When the USB100 mode is selected, the charge current level is limited to 87mA. In all cases, a lower register value setting will impose an overriding current limit. Safety Timers The integrated safety timers provide protection in case of a defective battery pack. The pre-charge timer starts after the pre-qualification check is completed and resets when the transition to the constant current mode happens. At that point, the fast charge timer is initiated. The fast charge timer expires and charge cycle is terminated if the termination current level is not reached within the pre-determined duration. Each safety timer has three programmable timeout periods, which eliminates the need for external timing capacitors and allows for maximum design flexibility. In addition, each timer can be disabled by the appropriate bit selection in Register 05h. STAT Output The STAT is an open-drain output that indicates battery charge status. STAT has two modes of operation, as determined by Register 05h[7]: in Mode 0, STAT is asserted low whenever the battery is charging and deasserted at all other times; in Mode 1, STAT is deasserted when the charger is disabled, blinks during charging, and remains continuously asserted when the charge cycle has completed. A pull-up resistor should be applied on this pin for interfacing to a microcontroller or other logic IC. Programmable Battery Charging A unique feature of the SMB239 is the ability to modify all of the important charger parameters via internally
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programmable EEPROM, found in Registers 00-07. Once the device has been configured correctly, the EEPROM may be locked, preventing any further changes. Additionally, these registers may also be configured so that they may be updated in RAM (volatile), even if the underlying EEPROM is locked. This feature is useful if it is desired to actively manage the charging profile without making changes to the nonvolatile defaults. Use Register 0E to control locking and volatile access. Before writing to Registers 00-07 in a volatile manner, Register 31[7] must first be set high. FAULT and STATUS Indicators A large number of battery charging conditions and parameters are monitored and corresponding fault and 2 status indications are available to the user via the I C compatible registers. These include the following: * * * * * * Charging status Safety timer timeout Over-temperature alarm Under-temperature alarm Over-voltage alarm Under-voltage alarm
* Missing battery detection Thermal Monitor A temperature sensing I/O (THERM) is provided to prevent excessive battery temperatures during charging. The battery temperature is measured by sensing the voltage between the THERM pin and ground. The voltage is created by injecting a current into the parallel combination of Negative Temperature Coefficient (NTC) thermistor and a resistor. This voltage is then compared to two predetermined voltages representing the maximum and minimum temperature settings of the battery. The purpose of the resistor in parallel to the NTC thermistor is to linearize the resistance of the thermistor. Table 1, shows the 1% resistor that should be placed in parallel with the corresponding thermistor. If the temperature limits are exceeded, battery charging will be suspended until the temperature level has fallen within the safe operating range. The over-temperature limit is programmable from 30C to 65C, and the under-temperature limit is programmable from -20C to 15C, each in 5C increments using Register 04h. In addition, the user can easily select the required bias current, based on the value of the negative temperature coefficient (NTC) thermistor located in the battery pack: 10k, 25k, 100k (Register 04h). Disabling the thermal monitor is also possible by selecting the appropriate bits in Register 04h. 12
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APPLICATIONS INFORMATION (CONTINUED)
As the temperature changes, the resistance of the thermistor changes creating a voltage proportional to temperature. The temperature coefficient or Beta () of the thermistor must be as close to 4400 as possible to achieve the maximum temperature accuracy. NTC THERMISTOR 10K 25K 100K RESISTANCE 24.9K 61.9K 249K
Table 1: NTC values and associated parallel resistances. Internal Thermal Protection When the die temperature of the SMB239 reaches approximately 110C, charge current will be reduced to prevent further die heating. This internal thermal protection circuit helps to improve device (and consequently, system) reliability.
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APPLICATIONS INFORMATION (CONTINUED)
EXTERNAL COMPONENTS Input and Output Capacitors The SMB239 allows for the use of low-cost ceramic capacitors on both the input and the output. The minimum input capacitance value is 4.7F. The minimum output capacitance of 4.7F is desired in parallel with the battery installed on the BATT pin. Taking account of the temperature degrading characteristics of ceramic capacitors, one is encouraged to select X5R or X7R rated ceramic capacitors. BOARD LAYOUT RECOMMENDATIONS The most critical components for the reliable operations of the SMB239 are the output capacitor and the input capacitor. Place those as close as possible to the SMB239. Pour sufficient copper along the power delivery path, namely, from the power source to the IN pin and from the OUT pin to the battery. This minimizes the distribution loss, therefore buys an additional margin for the IN-to-OUT drop-out voltage. Route the BATT pin to the positive terminal of the battery by traces wider than 10mils. POWER DISSIPATION The SMB239 incorporates a thermal regulation circuit that reduces charge current when die temperature rises o to high levels (greater than 110 C). The conditions under which this charge current reduction finds place can be determined by calculating device power dissipation. Most of the SMB239 power dissipation is generated in the internal power MOSFET. The worstcase scenario occurs when the input voltage is at its highest level and the device has transitioned from the pre-charge to the fast-charge phase. In this case, both the input-to-output differential and the charge current level are large, resulting in high thermal dissipation. Actual power dissipation can be calculated by using the following formula: PDACTUAL = (VIN - VBATT) x IOUT Where: VIN = input (adapter or USB port) voltage VBATT = battery voltage IOUT = charge current Assuming the SMB239 operates from a 5V10% (worst case: 5.5V) supply and is configured to deliver a charge current of 200mA to a discharged Li-Ion battery with a voltage of 3.6V, the power dissipation can be calculated as follows: PDACTUAL = (5.5V - 3.5V) x 0.3A = 600mW The maximum allowable power dissipation for a specific package and board layout can be calculate by using the following formula: PDMAXIMUM = (TJ - TA) / ThetaJA Where: TJ = maximum allowable junction (silicon) temperature TA = maximum ambient temperature ThetaJA = package thermal resistance (depends highly on board layout) Combining the two formulas (actual and maximum allowable power dissipation) allows the user to calculate the ambient temperature at which the SMB239 will start reducing charge current for safe operation. By using our example above and an estimated ThetaJA of 60oC/W, the ambient temperature can be calculated as follows: TA = TJ - (PDMAXIMUM x ThetaJA) = TJ - (VIN - VBATT) x IOUT x ThetaJA = 110 oC - (5.5V - 3.5V) x 0.30A x 60oC/W = 74 oC
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SMB239
APPLICATIONS INFORMATION (CONTINUED)
POR
Set I(charge-max)
Standby Mode (Pause Charge)
NO
Vin > Vbat+130mV ? (Always Monitored)
YES
YES
Vbat>2.0V?
NO
10mA trickle charge (timers off)
NO Optional Operation (controlled by register)
Vbatt < Vfloat - 200mV ? (Always Monitored)
YES
Vbat YES
Precharge Mode Reset t(precharge)
Regulate Current to I(precharge) (NO NO Vbat Fast Charge Mode Reset t(charge)
NO YES
t(precharge) expired? NO Vbat < Vfloat?
NO
Regulate Voltage to Vfloat
YES Regulate Current to I(charge) <(Icharge-max)
YES
YES
I(charge) < I(terrm)? NO NO
YES
Battery Fault
t(charge) expired?
YES Terminate Charge Standby Mode
t(charge) expired?
NO
Vbat NO
YES
Terminate Charge Standby Mode
Vbat < Vfloat115mV?
YES
Figure 5 - Functional flow chart.
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SMB239
APPLICATIONS INFORMATION (CONTINUED)
D1 C1 4.7uF, 0805, 16V
IN
C2 0.1uF, 0603, 16V
C2 B2
SCL SDA
U1 SMB239 CSP
OUT
D2
B1
GND
BATT
A1
C1
STAT
THERM
A2
C3 4.7uF, 0805, 16V R1 24.9k, 0402 RT1 10K, 0402
t
D1 SM LED
R2 10k 0603
Figure 6 - Typical applications schematic.
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SMB239
APPLICATIONS INFORMATION (CONTINUED)
Table 2: Recommended Bill of Material. Item Description Resistors 1 2 3 4 5 6 7 Resistor, 24.9k, 0402, 1% Resistor, 10k, 0603, 1% Thermistor, 10k, 0402 Capacitors Ceramic, 4.7uF, X5R, 16V, 0805 Ceramic, 0.1uF, X7R, 16V, 0603 Semiconductors SMB239E (CSP), Linear Charger LED, Red, SMD, 0805 Summit Microelectronics Lite-On# LTST-C190CKT 1 1 U1 D1 Murata# GRM40X5R475K16D520 Kemet # C0603C104K4RACTU 2 1 C1, C3 C2 Vishay# CRCW04022492F Vishay# CRCW06031002F TDK# NTCG103JF103FT 1 1 1 R1 R2 RT Vendor / Part Number Qty Ref. Des.
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SMB239
DEVELOPMENT HARDWARE & SOFTWARE
The SMX3202 system consists of a USB programming Dongle, cable and WindowsTM GUI software. It can be ordered on the website or from a local representative. The latest revisions of all software and an application brief describing the SMX3202 is available from the website (www.summitmicro.com). The SMX3202 programming Dongle/cable interfaces directly between a PC's USB port and the target application. The device is then configured on-screen via an intuitive graphical user interface employing dropdown menus. The Windows GUI software will generate the data and send it in I2C serial bus format so that it can be directly downloaded to the SMB239 via the programming Dongle and cable. An example of the connection interface is shown in Figure 9. When design prototyping is complete, the software can generate a HEX data file that should be transmitted to Summit for approval. Summit will then assign a unique customer ID to the HEX code and program production devices before the final electrical test operations. This will ensure proper device operation in the end application.
Top view of straight 0.1" x 0.1" closed-side connector. SMX3202 interface cable connector. Pin 10, NC Pin 8, SHDN Pin 6, MR# Pin 4, SDA Pin 2, SCL Pin 9, 5.0V Pin 7, 10V Pin 5, Reserved Pin 3, GND Pin 1, GND
IN
SMB239
SDA SCL
10 8 6 4 2
9 7 5 3 1
0.1F
GND
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SMB239
I2C PROGRAMMING INFORMATION
SERIAL INTERFACE Access to the configuration registers, command and status registers is carried out over an industry standard 2-wire serial interface (I2C). SDA is a bidirectional data line and SCL is a clock input (Figure4). Data is clocked in on the rising edge of SCL and clocked out on the falling edge of SCL. All data transfers begin with the MSB. During data transfers, SDA must remain stable while SCL is high. Data is transferred in 8-bit packets with an intervening clock period in which an Acknowledge is provided by the device receiving data. The SCL high period (tHIGH) is used for generating Start and Stop conditions that precede and end most transactions on the serial bus. A high-to-low transition of SDA while SCL is high is considered a Start condition while a low-to-high transition of SDA while SCL is high is considered a Stop condition. The interface protocol allows operation of multiple devices and types of devices on a single bus through unique device addressing. The address byte is comprised of a 7-bit device type identifier (slave address). The remaining bit indicates either a read or a write operation. Refer to Table 1 for a description of the address bytes used by the SMB239. The device type identifier for the configuration registers and the command and status registers are accessible with the same slave address. The slave address can be can be programmed to any seven bit number 0000000BIN through 1111111BIN. Table 3. WRITE Writing to a configuration register is illustrated in Figures 10 and 11. A Start condition followed by the slave address byte is provided by the host; the SMB239 responds with an Acknowledge; the host then responds by sending the memory address pointer or configuration register address pointer; the SMB239 responds with an acknowledge; the host then clocks in one byte of data. For configuration register writes, up to 15 additional bytes of data can be clocked in by the host to write to consecutive addresses within the same page. Slave Address ALL Register Type Configuration Registers are located in 00 HEX thru 05 HEX , 07HEX, 0CHEX, 0EHEX and 0FHEX Table 3 - Address bytes used by the SMB239. After the last byte is clocked in and the host receives an Acknowledge, a Stop condition must be issued to initiate the nonvolatile write operation. READ The address pointer for the non-volatile configuration registers and memory registers as well as the volatile command and status registers must be set before data can be read from the SMB239. This is accomplished by issuing a dummy write command, which is a write command that is not followed by a Stop condition. A dummy write command sets the address from which data is read. After the dummy write command is issued, a Start command followed by the address byte is sent from the host. The host then waits for an Acknowledge and then begins clocking data out of the slave device. The first byte read is data from the address pointer set during the dummy write command. Additional bytes can be clocked out of consecutive addresses with the host providing an Acknowledge after each byte. After the data is read from the desired registers, the read operation is terminated by the host holding SDA high during the Acknowledge clock cycle and then issuing a Stop condition. Refer to Figure 12 for an illustration of the read sequence. CONFIGURATION REGISTERS Writing and reading the configuration registers is shown in Figures 10, 11 and 12. A description of the configuration registers is shown in Table 3 through Table 12. GRAPHICAL USER INTERFACE (GUI) Device configuration utilizing the Windows based SMB239 graphical user interface (GUI) is highly recommended. The software is available from the Summit website (www.summitmicro.com). Using the GUI in conjunction with this datasheet, simplifies the process of device prototyping and the interaction of the various functional blocks. A programming Dongle (SMX3202) is available from Summit to communicate with the SMB239. The Dongle connects directly to the USB port of a PC and programs the device through a cable using the I2C bus protocol. See Figure 9 and the SMX3202 Data Sheet.
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SMB239
I2C PROGRAMMING INFORMATION (CONTINUED)
S T A R T S A 3 Slave S A 2 S A 1 S A 0 S T O P D 2 D 1 D 0 A C K
M aster
Bus Address A 2 A 1 A 0 C 7 A C K C 6
Configuration Register Address C 5 C 4 C 3 C 2 C 1 C 0 A C K D 7 D 6 D 5
Data D 4 D 3
W
Figure 10 - Configuration Register Byte Write
S T A R T S A 3 Slave S A 2 S A 1 S A 0
M aster
Bus Address A 2 A 1 A 0 C 7 A C K C 6
Configuration Register Address C 5 C 4 C 3 C 2 C 1 C 0 A C K D 7 D 6 D 5
Data (1) D 4 D 3 D 2 D 1 D 0 A C K
W
M aster D 7 Slave D 6 D 5
Data (2) D 4 D 3 D 2 D 1 D 0 A C K D 7 D 6 D 5 D 2 D 1 D 0 A C K D 7 D 6 D 5
Data (16) D 4 D 3 D 2 D 1 D 0 A C K
S T O P
Figure 11 - Configuration Register Page Write
S T A R T S A 3 Slave S A 2 S A 1 S A 0 S T A R T C 1 C 0 A C K S A 3 S A 2 S A 1 S A 0
M aster
Bus Address A 2 A 1 A 0 C 7 A C K C 6
Configuration Register Address C 5 C 4 C 3 C 2
Bus Address A 2 A 1 A 0
W
R A C K
M aster D 7 Slave D 6 D 5
Data (1) D 4 D 3 D 2 D 1 D 0
A C K D 7 D 6 D 5 D 2 D 1 D 0
A C K D 7 D 6 D 5
Data (n) D 4 D 3 D 2 D 1 D 0
N A C K
S T O P
Figure 12 - Configuration Register Read
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SMB239
CONFIGURATION REGISTERS
The following tables describe the user-programmable registers of the SMB239 programmable battery charger. Locations 00-0F are non-volatile, EEPROM registers; however, registers 00-07, which contain the battery charging parameters, may also be configured to be programmable in RAM. Locations 31-3F contain volatile status and command registers. To lock all of the configuration registers, set 0E[2]=1; please note that this operation cannot be undone. To allow volatile access to locations 00-07, set 0E[0]=1; then after every power-on, 31[7] must also be set high. It is prohibited to write to any location, not specifically mentioned in the tables below4. Table 4 - Charge current - 8-bit (address: 00h) - Non-Volatile & Volatile (mirror)
Bit7 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Bit7 X X X X X X X X X X X X X X X X Bit6 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Bit6 X X X X X X X X X X X X X X X X Bit5 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Bit5 X X X X X X X X X X X X X X X X Bit4 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Bit4 X X X X X X X X X X X X X X X X Bit3 X X X X X X X X X X X X X X X X Bit3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Bit2 X X X X X X X X X X X X X X X X Bit2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Bit1 X X X X X X X X X X X X X X X X Bit1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Bit0 X X X X X X X X X X X X X X X X Bit0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Fast Charge Current 47.5mA 62.5mA 65.0mA 67.5mA 195mA 225mA 255mA 285mA 315mA 345mA 375mA 405mA 435mA 465mA 495mA 525mA Pre-charge current 25mA 37.5mA 50mA 62.5mA 75mA 87.5mA 100mA 112.5mA 125mA 137.5mA 150mA 162.5mA 175mA 187.5mA 200mA 212.5mA
CONFIDENTIAL DO NOT COPY
Note 4: Never Write to Reserved bits. Note 5: Charge current can be limited by internal current limit under certain conditions.
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SMB239
CONFIGURATION REGISTERS (CONT.)
Table 5 - Termination current - 8-bit (address: 01h) - Non-Volatile & Volatile (mirror)
Bit7 X X X X X X X X X X X X X X X X Bit6 X X X X X X X X X X X X X X X X Bit5 X X X X X X X X X X X X X X X X Bit4 X X X X X X X X X X X X X X X X Bit3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Bit2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Bit1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Bit0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Termination Current 25mA 40mA 55mA 70mA 85mA 100mA 115mA 130mA 145mA 160mA 175mA 190mA 205mA 220mA 235mA 250mA
Table 6 - Float Voltage - 8-bit (address: 02h) - Non-Volatile & Volatile (mirror)
Bit7 X X X X X X X X X X X X X X X X X X X X X Bit6 X X X X X X X X X X X X X X X X X X X X X Bit5 X X X X X X X X X X X X X X X X X X X X X Bit4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 Bit3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 Bit2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 Bit1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 Bit0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 Float Voltage 3.850V 4.020V 4.040V 4.060V 4.080V 4.100V 4.120V 4.140V 4.160V 4.180V 4.200V 4.220V 4.240V 4.260V 4.280V 4.300V 4.320V 4.340V 4.360V 4.380V 4.400V
Note 4: Never Write to Reserved bits.
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SMB239
CONFIGURATION REGISTERS (CONT.)
Table 7 - Other Charging Parameters - 8-bit (address: 03h) - Non-Volatile & Volatile (mirror)
Bit7 0 1 Bit7 X X Bit7 X X X X X X X X Bit7 X X Bit7 X X Bit6 X X Bit6 0 1 Bit6 X X X X X X X X Bit6 X X Bit6 X X Bit5 X X Bit5 X X Bit5 0 0 0 0 1 1 1 1 Bit5 X X Bit5 X X Bit4 X X Bit4 X X Bit4 0 0 1 1 0 0 1 1 Bit4 X X Bit4 X X Bit3 X X Bit3 X X Bit3 0 1 0 1 0 1 0 1 Bit3 X X Bit3 X X Bit2 X X Bit2 X X Bit2 X X X X X X X X Bit2 X X Bit2 X X Bit1 X X Bit1 X X Bit1 X X X X X X X X Bit1 0 1 Bit1 X X Bit0 X X Bit0 X X Bit0 X X X X X X X X Bit0 X X Bit0 0 1 Automatic Recharge Enabled Disabled Current Termination Enabled Disabled Pre-charge to Fast-charge Voltage Threshold 2.4V 2.5V 2.6V 2.7V 2.8V 2.9V 3.0V 3.1V Hold-off Timer <1msec (short) 256msec (long) Charger Error Charger Error disallows re-charge cycles Charger Errors are blocked
Table 8 - Cell temperature monitor - 8-bit (address: 04h) - Non-Volatile & Volatile (mirror)
Bit7 0 0 1 1 Bit7 X X X X X X X X Bit7 X X X X X X X X Bit6 0 1 0 1 Bit6 X X X X X X X X Bit6 X X X X X X X X Bit5 X X X X Bit5 0 0 0 0 1 1 1 1 Bit5 X X X X X X X X Bit4 X X X X Bit4 0 0 1 1 0 0 1 1 Bit4 X X X X X X X X Bit3 X X X X Bit3 0 1 0 1 0 1 0 1 Bit3 X X X X X X X X Bit2 X X X X Bit2 X X X X X X X X Bit2 0 0 0 0 1 1 1 1 Bit1 X X X X Bit1 X X X X X X X X Bit1 0 0 1 1 0 0 1 1 Bit0 X X X X Bit0 X X X X X X X X Bit0 0 1 0 1 0 1 0 1 Thermistor Current 100A (10k NTC) 40A (25k NTC) 10A (100k NTC) 0A (Disabled) Low Temperature Alarm Trip Point -20C -15C -10C -5C 0C +5C +10C +15C High Temperature Alarm Trip Point +30C +35C +40C +45C +50C +55C +60C +65C
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SMB239
CONFIGURATION REGISTERS (CONT.)
Table 9 - Battery charging control - 8-bit (address: 05h) - Non-Volatile & Volatile (mirror)
Bit7 0 1 Bit7 X X Bit7 X X X X Bit7 X X X X Bit6 X X Bit6 X X Bit6 X X X X Bit6 X X X X Bit5 X X Bit5 0 1 Bit5 X X X X Bit5 X X X X Bit4 X X Bit4 X X Bit4 X X X X Bit4 X X X X Bit3 X X Bit3 X X Bit3 0 0 1 1 Bit3 X X X X Bit2 X X Bit2 X X Bit2 0 1 0 1 Bit2 X X X X Bit1 X X Bit1 X X Bit1 X X X X Bit1 0 0 1 1 Bit0 X X Bit0 X X Bit0 X X X X Bit0 0 1 0 1 Status Output STAT is active low while charging, active high all other times STAT blinks while charging, is active low when finished, active high when disabled Glitch Filter Glitch filter enabled Glitch filter disabled Fast-charge Timeout 350 min 699 min 1398 min Disabled Pre-charge Timeout 44 min 87 min 175 min Disabled
Table 10 - STAT Output - 8-bit (address: 07h) - Non-Volatile & Volatile (mirror)
Bit7 X X Bit7 X X Bit7 X X Bit6 X X Bit6 X X Bit6 X X Bit5 X X Bit5 X X Bit5 X X Bit4 X X Bit4 X X Bit4 X X Bit3 X X Bit3 X X Bit3 X X Bit2 0 1 Bit2 X X Bit2 X X Bit1 X X Bit1 0 1 Bit1 X X Bit0 X X Bit0 X X Bit0 0 1 STAT Output Indicator Battery charge status Input over-voltage or input under-voltage Battery over-voltage Behavior Charger is shutdown Charger is not shutdown USB500/100 Control Device is always limited to USB100 charge levels USB100/500 mode is determined by Register 31[3]
Table 11 - Charging Mode - 8-bit (address: 0Ch) - Non-Volatile
Bit7 X X X X Bit6 X X X X Bit5 X X X X Bit4 X X X X Bit3 X X X X Bit2 0 0 1 1 Bit1 0 1 0 1 Bit0 X X X X Charging Mode Power cycle initiates charging Power cycle initiates charging only when VBATT < VFLT - 220mV Power cycle initiates charging only when VBATT < VFLT - 390mV Power cycle initiates charging only when VBATT < VFLT - 550mV
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SMB239
CONFIGURATION REGISTERS (CONT.)
Table 12 - Configuration and User Memory Lock - 8-bit (address: 0Eh) - Non-Volatile
Bit7 X X Bit7 X X Bit7 X X Bit6 X X Bit6 X X Bit6 X X Bit5 X X Bit5 X X Bit5 X X Bit4 X X Bit4 X X Bit4 X X Bit3 X X Bit3 X X Bit3 X X Bit2 0 1 Bit2 X X Bit2 X X Bit1 X X Bit1 0 1 Bit1 X X Bit0 X X Bit0 X X Bit0 0 1 Configuration Lock Unlocked - user can write to non-volatile Configuration bits Locked - user cannot write to non-volatile Configuration bits User-Memory Lock Unlocked - user can write to general purpose EE bits (h20-h2F) Locked - user cannot write to general purpose EE bits (h20-h2F) Volatile Writes Permission No volatile writes to registers h00-h07 Allow volatile writes to registers h00-h07 (even if h0E[2]=1)
Table 13 - EN Polarity & I2C Bus/Slave Address - 8-bit (address: 0Fh) - Non-Volatile
Bit7 0 1 Bit7 X X X X X X X X Bit7 X X X X X X X X X X X X X X X X Bit6 X X Bit6 0 0 0 0 1 1 1 1 Bit6 X X X X X X X X X X X X X X X X Bit5 X X Bit5 0 0 1 1 0 0 1 1 Bit5 X X X X X X X X X X X X X X X X Bit4 X X Bit4 0 1 0 1 0 1 0 1 Bit4 X X X X X X X X X X X X X X X X Bit3 X X Bit3 X X X X X X X X Bit3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Bit2 X X Bit2 X X X X X X X X Bit2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Bit1 X X Bit1 X X X X X X X X Bit1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Bit0 X X Bit0 X X X X X X X X Bit0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 I C EN Polarity (Register 31[4]) Active low - i.e. when R31[4]=0, charging is enabled Active high - i.e. when R31[4]=1, charging is enabled I C Bus Address 000 001 010 011 100 101 110 111 2 I C Slave Address 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111
2 2
Note 4: Never Write to Reserved bits.
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SMB239
CONFIGURATION STATUS REGISTERS
Table 14 - Volatile Configuration & Charger Enable - 8-bit (address: 31h) - Volatile
Bit7 0 1 Bit7 X X Bit7 X X Bit6 X X Bit6 X X Bit6 X X Bit5 X X Bit5 X X Bit5 X X Bit4 X X Bit4 0 1 Bit4 X X Bit3 X X Bit3 X X Bit3 0 1 Bit2 X X Bit2 X X Bit2 X X Bit1 X X Bit1 X X Bit1 X X Bit0 X X Bit0 X X Bit0 X X Volatile Configuration Volatile writes to h00-h07 are disabled Volatile writes to h00-h07 are enabled (if CFG h0E[0]=1) Charger Enable Enabled if 0F[7]=0; Disabled if 0F[7]=1 Disabled if 0F[7]=0; Enabled if 0F[7]=1 USB500/100 Select (This bit only has an effect when CFG 07[0]=1) USB 100mA current level USB 500mA current level
Table 15 - Battery status register - 8-bit (address: 36h) - Volatile (read only)
Bit7 1 X Bit7 X X X Bit7 X X X X Bit7 X Bit6 X 1 Bit6 X X X Bit6 X X X X Bit6 X Bit5 X X Bit5 0 0 1 Bit5 X X X X Bit5 X Bit4 X X Bit4 0 1 0 Bit4 X X X X Bit4 X Bit3 X X Bit3 X X X Bit3 X X X X Bit3 X Bit2 X X Bit2 X X X Bit2 0 0 1 1 Bit2 X Bit1 X X Bit1 X X X Bit1 0 1 0 1 Bit1 X Bit0 X X Bit0 X X X Bit0 X X X X Bit0 1 Charging Status Charger has completed at least 1 successful charge since being enabled Charger has completed at least 1 re-charge cycle since being enabled Timeout Status No timeouts have occurred Pre-charge timeout Fast-charge timeout Charging Status Idle Pre-charging Fast-charging Charge termination Charging Status Charger is enabled
Table 16 - Battery fault register - 8-bit (address: 37h) - Volatile (read only)
Bit7 1 X X X X X Bit6 X 1 X X X X Bit5 X X 1 X X X Bit4 X X X 1 X X Bit3 X X X X 1 X Bit2 X X X X X X Bit1 X X X X X X Bit0 X X X X X 1 Fault Output Battery missing Charging error Battery over-voltage condition Charger over-voltage condition Charger under-voltage condition Termination Detect Current Threshold has been hit
Note 4: Never Write to Reserved bits.
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SMB239
DEFAULT CONFIGURATION REGISTER SETTINGS
Table 17 - Default Configuration Register Settings
Register 00 01 02 03 Contents D2 02 0A 30 Register 04 05 07 0C Contents 24 05 03 00 Register 0E 0F Contents 01 A4
The default device ordering number is SMB239E-989. It is programmed with the register contents as shown above.
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SMB239
PRODUCTION PACKAGE DRAWING
0.5 (Typical) 1.24 +/- 0.04 A1 A2 0.28 (Typical)
2.04 +/- 0.04
B1
B2
C1
C2
D1
D2
TOP VIEW 0.20 +/- 0.02
BOTTOM VIEW
0.28 +/- 0.02 Notes: 1) All Dimensions in [mm] 2) Drawing not to scale 0.40 REF SIDE VIEW 0.60 +/- 0.03
8-Ball Ultra CSPTM
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SMB239
ENGINEERING PACKAGE DRAWING
Note: QFN package type is available for engineering samples only
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SMB239
PART MARKING
Summit Part Number Lead-free
Note: Marking is subject to change - contact factory for more information
Ball A1 Identifier
239VSS 01AYWW
Status Tracking Code (Summit Use)
Date Code (YWW) Multiple Lot Disignator Drawing not to scale X is the sequential number per wafer (1 for first wafer, 2 for second wafer, etc.)
ORDERING INFORMATION
SMB239 Summit Part Number Package E T nnn V Lead Free
Specific requirements are contained in the suffix Default part-number is: SMB239ET-1008V
E = 8-Ball Ultra CSPTM
Part Number Suffix
Tape & Reel
NOTICE
NOTE - This is a Final data sheet that describes a Summit product currently in production. SUMMIT Microelectronics, Inc. reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. SUMMIT Microelectronics, Inc. assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein reflect representative operating parameters, and may vary depending upon a user's specific application. While the information in this publication has been carefully checked, SUMMIT Microelectronics, Inc. shall not be liable for any damages arising as a result of any error or omission. SUMMIT Microelectronics, Inc. does not recommend the use of any of its products in life support or aviation applications where the failure or malfunction of the product can reasonably be expected to cause any failure of either system or to significantly affect their safety or effectiveness. Products are not authorized for use in such applications unless SUMMIT Microelectronics, Inc. receives written assurances, to its satisfaction, that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; and (c) potential liability of SUMMIT Microelectronics, Inc. is adequately protected under the circumstances. Revision 3.0 - This document supersedes all previous versions. www.summitmicro.com for data sheet updates. (c) Copyright 2007 SUMMIT MICROELECTRONICS, Inc. I2C is a trademark of Philips Corporation Please check the Summit Microelectronics Inc. web site at
PROGRAMMABLE POWER FOR A GREEN PLANETTM
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