View MC33385DH_659515.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MOTOROLA
Freescale Semiconductor, Inc. MC33385 SEMICONDUCTOR
Automotive Quad Low Side Driver
The MC33385 is a Quad Low Side Driver fully protected switch. This device is a general purpose Low Side Driver but has been especially designed to operate in engine management application as injector driver or automotive gear box. It is interfaced directly with a microcontroller for parallel control of the load and the individual output diagnostic is done through a SPI. The diagnostic logic recognizes 4 failure types at each output stage the overcurrent, the short to GND, the openload and the over-temperature. * RDSON of 250m per Output at 25 C * Supplied from the main 5V Vcc * Input CMOS Compatible * Diagnostic through SPI * Nominal Current of 2A per Output * Current Limitation at 3A with Automatic Turn Off * Output Internally Clamped at 50V typ for Inductive Load Drive * Junction to Case Thermal Resistance of 4.4 C/W * Individual Output over Temperature Shutdown
QUAD LOW SIDE DRIVER
SEMICONDUCTOR TECHNICAL DATA
DH SUFFIX HSOP20 PACKAGE
PIN ASSIGNMENT
21
Freescale Semiconductor, Inc...
GND2 OUT2 N.C NON2 SDI CLK NCS NON4 OUT4 GND4
1 2 3 4 5
20 19 18 17 16
GND1 OUT1 N.C NON1 SDO NRES VCC NON3 OUT3 GND3
Heat sink
6 7 8 9 10 21 15 14 13 12 11
ORDERING INFORMATION
Device MC33385DH Temperature Range -40 to +125 C C Package HSOP20
Simplified Block Diagram
VCC
TRIGGER
Charge Pump OUT1
NON1 NON2 NON3 NON4
RES URES Over-temp. detection URES RES S DRIVER R
dv/dt control
OUT2 OUT3 OUT4
FR Reset VCC
IRES
ON1 I-SCB filter t-ISCB ON1
SDI VCC
I-OL filter t-IOL NON1
CLK VCC Shift Register NCS
IRES
Failure Register (FR)
SCG filter t-SCG
URES RES
V ref
OSC
SDO
Under Voltage Reset
Reset
Oscillator
For More Information On This Product, GND NRES Go to: www.freescale.com
(c) Motorola,Inc 1999 Rev 5.1
Freescale Semiconductor, Inc.
MAXIMUM RATINGS TJ = - 40C up to 150C
Ratings SUPPLY VOLTAGE Voltage Range OUTPUTS : 1...4 Continuous Output Voltage (With no reverse current) Continuous Current Peak Output Current Clamped Energy at the Switching OFF (See figure 6) INPUTS Input Voltage (Inputs) Input Protection Diode Current OUTPUTS : SDO Input Voltage (Outputs) Input Protection Diode Current THERMAL RATINGS Operating Junction Temperature Thermal Resistance : Junction-case (One powerstage in use) Thermal Resistance : Junction-ambient (Device soldered on printed circuit board) Tj Rthjc R thja - 40 150 4.5 50 C K/W K/W Vo Io - 0.3 - 20 Vcc + 0.3 1 V mA VIN IIN - 0.3 - 20 Vcc + 0.3 1 V mA Vout Ioutc Ioutp W OFF - 10 - 0.3 45
2.5
MC33385
Symbols
Min
Max
Unit
Vcc
- 0.3
7
V
V A A mJ for 1ms
ISCBmax 70
Freescale Semiconductor, Inc...
RANGE OF FUNCTIONALITY
Tcase = - 40 up to 125 C C
Ratings SUPPLY VOLTAGE Supply Voltage Range JUNCTION TEMPERATURE Junction Temperature Continuous (Continuous) Junction Temperature Dynamical (Time limited) OUTPUT CURRENT Output Current Range RESET BEHAVIOUR Reset Changeable (at NRES-Pin) Undervoltage Reset (Independent of NRES) Active for Vcc = 0V to VccPRO UNDERVOLTAGE PROTECTION Protection active for Vcc=0V to Vccpro OVER TEMPERATURE Temperature Detection Threshold
Symbols
Min
Max
Unit
Vcc
4.5
5.5
V
Tj1 Tj2
- 40
150 185
C C
Iout
ISCBmax
Vcc VccRES
VccRES 3.35
5.5 3.95
V V
VccPRO
1.5
4.0
V
TOFF
155
185
C
MC33385
For More Information On This Product, MOTOROLA Go to: www.freescale.com
2
Freescale Semiconductor, Inc.
ELECTRICAL CHARACTERISTICS TCASE = - 40up to + 125C and V CC = 4.5V up to 5.5V
Parameters SUPPLY CURRENT Standby Current (without load) (NON1...NON4 = High Level) 5.15V VCC 5.5V VCC Operating Mode (For 5.15V VCC ) (Iout 1...4) = 2A Icc During Reverse Output Current (Iout = - 5A on one output) INPUTS NONx, NCS, CLK, NRES, SDI Low Threshold High Threshold Hysteresis Input Current (Vin = Vcc) Input Current (Vcc >VRES & 0VMC33385
IccSTB1 IccSTB2 IccOPM Icc
6 7 17 100 50
mA mA mA mA mA
Freescale Semiconductor, Inc...
OVRp1 OVRp2 OVRn tdCP
2 3.5 1.75
3 6 3
5 10 4 40
V/s V/s V/s s s
tdON
1
2.5
5
MC33385
For More Information On This Product, MOTOROLA Go to: www.freescale.com
3
ELECTRICAL CHARACTERISTICS TCASE = - 40up to + 125C and V CC = 4.5V up to 5.5V
Parameters Turn OFF Delay (NON = 50%, Vout = 0.1 * VBat) (NON = 50%, Vout = 4V) Undervoltage Protection Max ON time after a output voltage ramp from 0V to 25V at V cc = 0V...Vccpro Matching Turn ON Delay (NON = 50%, Vout = 0.9 * VBat) Rise time Turn OFF (10% - 90% of V clp ) OUTPUTS REVERSE DIODE Reverse Output Current Reverse Peakcurrent (Note 1 and 2) Reverse Voltage Drop - I out = - 5A - I out = - 2,5A POWERSTAGE PROTECTION Short Current Limit Short Circuit Delay Time V cc Undervoltage DIAGNOSTIC Short to GND Threshold Voltage for IOUT 2A Short to GND Filter Time Open Load Threshold Current Open Load Filter Time Pull-up Resistor Temperature Detection Threshold VREF TSCG IOL tOL R OL TOFF ISCB tSCB Vccmin IRD IRDP Symbol
Freescale Semiconductor, Inc.
Min Typ Max Unit
MC33385
tdOFFa tdOFFb trpON
1 4.7
3 7.5 100
s s s
tmON
-3
3
s
trOFF
8.5
12
2,5 5
A A
Freescale Semiconductor, Inc...
VRD1 VRD2
1.0 0.85
1.7 1.7
V V
3.0 0.2 3.35
5 2 3.95
A s V
0.390xVcc 140 10 140 2.0 155
0.435xVcc 250 50 250 8.0 185
V s mA s k C
NOTES 1&2:
For t 2ms. Max. reverse current is limited to - 10A (for all outputs together)
SERIAL DIAGNOSTIC LINK : Load Capacitor at SDI and SDO = 100pF Clock Frequency (50% duty cycle) Minimum Time CLK = HIGH Minimum Time CLK = LOW Propagation Delay (CLF Data at SDO valid) NCS = LOW to Data at SDO Valid CLK Low Before NCS Low (Setup time CLK to NCS change H/L) CLK Change L/H after NCS = Low SDI Input Set up Time (CLK change H/Lafter SDI data valid) SDI Input Hold Time (SDI data hold after CLK change H/L) CLK Low Before NCS High CLK High After NCS High fclk tclh tcll tpcld tpcld tsclch 100 3 100 100 100 100 MHz ns ns ns ns ns
thclcl tscld
100 20
ns ns
thcld tsclcl thclch 150 150
20
ns ns ns
MC33385
For More Information On This Product, MOTOROLA Go to: www.freescale.com
4
Freescale Semiconductor, Inc.
ELECTRICAL CHARACTERISTICS TCASE = - 40up to + 125C and V CC = 4.5V up to 5.5V
Parameters NCSL/H ti Output Data Flout Capacitance at SDI, SDO, CLk, CS NCS Filtertime (Pulses tfNCS will be ignored) Symbol tpchdz tpcld tfNCS 10 Min Typ Max 100 10 40 Unit ns pF ns
MC33385
DIAGNOSTIC REGISTER AND SPI TIMING Figure1- Timing Diagram to Read the Diagnostic Register
NCS CLK SDO SDI FR-RESET
FSL
LSB
D1
D2
D3
D4
D5
D6
MSB
Freescale Semiconductor, Inc...
LSB
D1
D2
D3
D4
D5
D6
MSB
NOTE : FR -RESET means Reset failure storage (internal signal)
Figure2 - Diagnostic Failure Register Structure
MSB LSB
D7
D6
D5
D4
D3
D2
D1
D0
FSL
FAILURE INDICATOR BIT Only valid during NCS = LOW to the first L to H CLK change 1 : failure stored 0 : no failure STATUS CHANNEL 4 11 : no failure 01 : open circuit 10: short to battery or overtemperature 00 : short to gnd STATUS CHANNEL 3 STATUS CHANNEL 2 STATUS CHANNEL 1
Figure3- Serial Interface Timing
NCS
tsclch thclcl tclh tcll tsclcl thclch
CLK
tcsdv tpcld FSL tcsdv D0 thcld D0 D1 D7 tpchdz D7
SDO
SDI
MC33385
For More Information On This Product, MOTOROLA Go to: www.freescale.com
5
Freescale Semiconductor, Inc.
Figure 4 - Diagram to Short-Circuit to GNDFailure (SCG-Failure) Detection
Failure detection time for an SCG failure
MC33385
NON
off on SCG-failure
Vdrain
Vdrain < Vref at off-state
t-SCG (filter-time)
Filter time
Failure detection
Freescale Semiconductor, Inc...
Failure store
Figure5- Diagram to Open Load Failure (OL-Failure) Detection
Sporatical failure detection Statical failure detection
Failure detection active for an sporatical OL-failure
NON
off on
Iload
I-OL
Iload > I-OL
Iload > IOL for t > tol
Diagnostic active
retrigger t filter retrigger filter t < t-ol
t-ol (filter-time)
tol Sporatical failure-detection
Failure detection
Failure store
Figure6- Max Clamp- Energy Specification
350 300 250 Energy (mJ) 200 150 100 50 0 0 0,5 1 1,5 2 2,5 Pulse-Duration (ms) 3 3,5 4 125 C 25 C
- 40 C
MC33385
For More Information On This Product, MOTOROLA Go to: www.freescale.com
6
MC33385
Freescale Semiconductor, Inc. DEVICE DESCRIPTION
Introduction The device is a Quad Low Side Driver driven by four CMOS input stages. Each output power transistor is protected against short to V BAT and by a zener clamp against overvoltage. A diagnostic logic recognizes four failure types at the output stage : overcurrent, short to GND, open-load and overtemperature. The failures are individually stored in a byte which can be read out via a serial interface (SPI). Output Stage Control Each of the four output stages is switched ON and OFF by an individual control line (NON-Input). The logic level of the control line is CMOS compatible. The output transistors are switched off when the inputs are not connected. Power Transistors Each of the four output stages has its own zenerclamp. This causes a voltage limitation at the power transistors when inductive loads are switched off. Drain voltage ramp occurring when output is switched on or off, is within defined limits. Output transistors can be connected in parallel to increase current capability. In this case, the associated inputs should be connected together. Short-Circuit and Overtemperature Protection If the output current increases above the short current limit for a time longer than t SCB or if the temperature increases above TOFF then the power transistor is immediately switched off. It remains switched off until the control signal on the NONInput is switched off and on again. Diagnostics Following failures at the output stage are recognized : Short -Circuit to VBAt or overtemp...... = SCB (Highest priority) Short -Circuit to GND............................. = SCG Open Load................................................. = OL (Lowest priority) The SCB failure is recognized by an overcurrent (current above the short current limit) or an overtemperature. If the current through the output stage is lower than the IOLreference, after a filter time an OL failure will be recognized. This measurement is active while the powerstage is switched on. The SCG failure will recognize when the drain voltage is lower than the OL reference limit, while the output stage is switched off. All four outputs have an independent overtemperature detection and shutdown. All failures are stored in individual registers. They can be read by the microprocessor via the serial interface. There is no failure detected if the powerstage control time is shorter than the filter time. Diagnostic Interface The communication between the microprocessor and the failure register runs via the SPI link. If there is a failure stored in the failure register, the first bit of the shift register is set to a high level. With the H/L change on the NCS pin the first bit of the diagnostic shift register will be transmitted to the SDO output. The SDO output is the serial output from the diagnostic shift register and it is tristated when the NCS pin is high. The CLK pin clocks the diagnostic shift register. New SDO data will appear on every rising edge of this pin and new SDI data will be latched on every CLK's falling edge into the shift register. With the first positive pulse of the CLK, the failure register will be cleared. There is no bus collision at a small spike at the NCS. The CLK is always LOW while the NCS-signal is changing. Reset There are two different reset functions realised : Under voltage reset : as long as the Vcc voltage is lower than VCCRES, the powerstages are switched off and the failureregister are reseted. Reset pin : as long as the NRES-pin is low, following circuits are reseted : * Powerstages * Failure register Undervoltage Protection At low Vcc voltage, the device remains switched off even if there is a voltage ramp at the OUT pin.
Freescale Semiconductor, Inc...
MC33385
For More Information On This Product, Go to: www.freescale.com MOTOROLA
7
Freescale Semiconductor, Inc.
This device is dedicated to automotive applications such as engine managements systems, automatic gear box... It interfaces between the microcontroller and the actuors of the system. The loads can be only resistive or resistive and inductive such as injectors, EGR valves...etc... Following is an example of application schematic, see figure below.
MC33385
Figure7- Typical Application
VBat
Voltage Regulator
Loads 47nF..150nF NCS Vcc GND1 CLK GND2 GND3 SDI GND4 SDO NRES MC33385 NON1 OUT1 NON2 OUT2 NON3 OUT3 OUT4 NON4
MCU
Freescale Semiconductor, Inc...
PINS FUNCTION DESCRIPTION
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 OUT1 GND1 Case NON2 SDI CLK NCS NON4 OUT4 GND4 GND3 OUT3 NON3 Vcc NRES SDO NON1 GND2 OUT2
Function Ground 2 Output Channel 2 NC
Description
Input Control Signal for Channel 2 Serial Data Input Clock Line for Serial Interface Chip Select for Serial Interface Input Control Signal for Channel 4 Output Channel 4 Ground 4 Ground 3 Output Channel 3 Input Control Signal for Channel 3 5V Power Supply Reset Input Data Output of Serial Interface Input Control Signal Channel 1 NC Output Channel 1 Ground 1 Connected to the PCB Ground for Thermal Purposes
MC33385
For More Information On This Product, MOTOROLA Go to: www.freescale.com
8
Freescale Semiconductor, Inc.
Figure8- Standby Current versus Temperature
3 2,75 2,50 IccSTB (mA) 2,25 2 1,75 Vcc=5,15V 1,50 1,25 1 -50 -25 0 25 50 75 T, TEMPERATURE ( C) 100 125 Vcc=5,5V 12,50 12,00 11,50 IccOPM (mA) 11,00 10,50 10,00 9,50 9,00 8,50 -50 Vcc=5,15V All outputs=2A -25 0 25 50 75 T, TEMPERATURE ( C) 100 125
MC33385
Figure9- Operating Mode Current versus
Temperature
Freescale Semiconductor, Inc...
Figure10- Low Threshold Input Voltage versus
Temperature 380 375 370 365 360 355 350 345 340 -50 -25 0 25 50 75 T, TEMPERATURE ( C) 100 125 Vcc=4,5V VinH/Vcc VinL/Vcc Vcc=5,5V
Figure11- High Threshold Input Voltage versus
Temperature 624 623 622 621 620 619 618 617 616 -50 -25 0 25 50 75 T, TEMPERATURE ( C) 100 125 Vcc=4,5V ou 5,5V
Figure12- Output Clamp Voltage versus Temperature
Figure13 - Rdson versus Temperature
55,00 54,50 54,00 53,50 Vclp (V) 53,00 52,50 52,00 51,50 51,00 -50 -25 0 25 50 75 T, TEMPERATURE ( C) 100 125 Iout1=1A RDSon (m)
400 375 350 325 300 275 250 225 200 -50 -25 0 25 50 75 T, TEMPERATURE ( C) 100 125 Vcc=4,5V Iout1=3A
MC33385
For More Information On This Product, MOTOROLA Go to: www.freescale.com
9
Freescale Semiconductor, Inc.
Figure14- Open Load versus Temperature Figure15- Vcc Undervoltage versus Temperature
3,78 3,77 3,76 VccMIN (V) -25 0 25 50 75 T, TEMPERATURE ( C) 100 125 3,75 3,74 3,73 3,72 3,71 3,70 -50 -25 0 25 50 75 T, TEMPERATURE ( C) 100 125
MC33385
24,50 24,25 24,00 23,75 Iol (mA) 23,50 23,25 23,00 22,75 22,50 -50
Freescale Semiconductor, Inc...
Figure16- Short Current Limit versus Temperature
4,60 4,50 4,40 4,30 ISCB (A) 4,20 4,10 4,00 Vcc=4,5V 3,90 3,80 -50 -25 0 25 50 75 T, TEMPERATURE ( C) 100 125 Vcc=5,5V
Figure17- Inductive Switching
I (200mA/div) Clamp voltage V (10V/div)
Figure18- Turn on Delay
Figure19- Turn off Delay
In1 (1V/div) Vout1(2V/div) tdoffa tdoffb In1 (1V/div)
tdon
Vout1(2V/div)
MC33385
For More Information On This Product, MOTOROLA Go to: www.freescale.com
10
Freescale Semiconductor, Inc.
CASE OUTLINES
MC33385
Freescale Semiconductor, Inc...
Motorola reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Motorola does not assume any liability arising out of the application or use of any product or circuit described herein ; neither does it convert any licence under its patent rights of others. Motorola products are not authorized for use as components in life support devices or systems intended for surgical implant into the body or intended to support or sustain life. Buyer agrees to notify Motorola of any such intended end use whereupon Motorola shall determine availability and suitability of its products for the use intended. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Employment opportunity/Affirmative Action Employer.
MC33385
For More Information On This Product, MOTOROLA Go to: www.freescale.com
11

▲Up To Search▲

Price & Availability of MC33385DH

	To Download MC33385DH Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .