View FAN8412M_1052249.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

www.fairchildsemi.com
FAN8412M/FAN8413M
2 Phase Half Wave BLDC Motor Predriver
Features
* A wide range of operation voltage: 4V to 28V * Locked motor protection with open collector alarm out or speed out and auto retry * Compact package: 8-SOP-225
Description
The FAN8412M/FAN8413M is a monolithic integrated circuit, and suitable for DC cooling fan motors predriver.
8-SOP-225
1
Typical Applications
* DC cooling fan motor
Ordering Information
Device FAN8412M FAN8412MX FAN8413M FAN8413MX FAN8412M_NL FAN8412MX_NL FAN8413M_NL FAN8413MX_NL
Note X : Tape & Reel NL : Lead Free
Package 8-SOP-225 8-SOP-225 8-SOP-225 8-SOP-225 8-SOP-225 8-SOP-225 8-SOP-225 8-SOP-225
Operating Temp. -40C ~ 95C -40C ~ 95C -40C ~ 95C -40C ~ 95C -40C ~ 95C -40C ~ 95C -40C ~ 95C -40C ~ 95C
Rev.1.0.3
(c)2004 Fairchild Semiconductor Corporation
FAN8412M/FAN8413M
Block Diagram
VCC 1
OUTB 8
IN+ 2
Commutation & Control
OUTA 7
AL / TACO 3 LD 6
IN4
GND
5
Pin Definitions
Pin Number 1 2 3 4 5 6 7 8 Pin Name VCC IN+ AL TACO IN- GND LD OUTA OUTB I/O P A O O A P A A A Pin Function Description Supply voltage Hall input + Alarm output (For FAN8412M) Speed output (For FAN8413M) Hall input - Ground Triangle pulse generator for lock detector and automatic restart Motor output A Motor output B Remark Open Collector Open Collector -
2
FAN8412M/FAN8413M
Equivalent Circuits
Description Pin No. Internal Circuit
OUTA
7
Vcc
Commutation
OUTB
8
7 8
3
AL / TACO
3
Lock detector
6
Lock detector & Automatic restart
Commutation
LD
6
VLDCP
VLDCL
Vcc
IN+ 2
2
4
IN-
4
3
FAN8412M/FAN8413M
Absolute Maximum Ratings (Ta = 25C)
Parameter Symbol Value Unit
Maximum Power Supply Voltage Maximum Power Dissipationnote1 Thermal Resistancenote1 Maximum Output Voltage Maximum Output Current Alarm Output Current Alarm Output Withstanding Voltage TACO Output Current TACO Output Withstanding Voltage Operating Temperature Storage Temperature
VCCMAX PDMAX
JA
32 600 208 36 0.07 10 36 10 36
-40 ~ 95 -55 ~ 150
V mW
C/W
VOMAX IOMAX IAL VAL ITACO VTACO TOPR TSTG
V A mA V mA V
C C
Note1: PCB Condition: Thickness (1.6mm), Dimension (76.2mm * 114.3mm) Refer: EIA/J SED 51-2 & EIA/J SED 51-3 Should not exceed PD or ASO value
Power Dissipation Curve (Air condition = 0m/s)
Power dissipation (W)
0.6
Ambient temperature, Ta (C) 25 150
Recommended Operating Conditions (Ta = 25C)
Parameter Symbol Min. Typ. - Max. Unit
Function Compensation Operating Voltage
VCC
4.0
28.0
V
4
FAN8412M/FAN8413M
Electrical Characteristics
(Ta=25C, VCC=12V unless otherwise specified)
Parameter TOTAL Symbol Conditions Min. Typ. Max. Unit
Supply Current
HALL AMPLIFIER INPUT RANGE
ICC VHDC VHOF ILDC ILDD RCD VLDCL VLDCP VOH VOL VALL IAL VTACOL ITACOL
When output is off. VLD=1.5V VLD=1.5V RCD=ILDC/ILDD IO=10mA IO=10mA IO=10mA VAL=2.0V IO=10mA VTACO=2.0V
1 15 2.2 0.4 3 2.54 0.54 10 8 8
3.2 3.8 0.88 5 2.94 0.74 10.5 0.2 0.2 -
5.0 Vcc-2 5.7 1.6 7 3.34 0.94 0.5 0.5 0.5 -
mA V mV
A A -
Pin2,4 Hall Input Range Pin2,4 Hall Input Offest
LOCK DETECTOR & AUTO RESTART
Pin6 Lock Detector Charging Current Pin6 Lock Detector Discharging Current Pin6 Lock Detector Charging/Discharging Ratio Pin6 Lock Detector Capacitor Clamp Voltage Pin6 Lock Detector Capacitor Comparator Voltage
OUTPUT STAGE
V V V V V mA V mA
Pin7, 8 Output High Level Voltage Pin7, 8 Output Low Level Voltage
AL / TACO OUTPUT
Pin3 Alarm Output Low Level Voltage Pin3 Alarm Output Current Capacity Pin3 Taco Output Low Level Voltage Pin3 Taco Output Current Capacity
5
FAN8412M/FAN8413M
Application Information
1. Lock Detection & Automatic Restart
Hall Input Output VLDCL VLDCP AL TACO Motor lock detected Motor lock TOFF TON
Motor lock cleared Motor restart
FAN8412M/FAN8413M features a lock detection and an automatic restart. The functions can be operated as follows. When the rotor is locked, there is no change in input signal of hall amplifier. A capacitor(CLD) connected LD pin is continually charged by internal current source (ILDC) to intrrnal threshold(VLDCL). When the voltage, VCLD on LD pin, reaches VLDCL, output power TR is turned-off to protect motor during TOFF and alarmoutput(AL) becomes floating high and taco output(TACO) becomes remain high or low. When the VCLD reaches upper threshold,VLDCL,VCLD starts to decrease with internal current sink(ILDD) to the low threshold,VLDCP. At that time, the VCLD charging repeat until locked condition is removed, or FAN8412M/FAN8413M is power down. The auto-restart time (TON), the motor protection time(TOFF) are propotional to external capacitor,CLD and each value can be calculated as follow;
C LD x ( V LDCL - V LDCP ) T ON = ---------------------------------------------------------------------I LDC T OFF C x (V -V ) LD LDCL LDCP = ---------------------------------------------------------------------I LDD
For example,CLD=1uF, then TON=0.57Sec, TOFF=2.2Sec. This AL or TACO output can be used to inform a locked rotor condition or speed information to super IO or system controller. Because the AL or TACO output is open collector type, end user can pull up this pin with a external resister to the supply voltage of their choice(that is 5 or 3.3V).
6
FAN8412M/FAN8413M
2. Hall Amplifier Input Block
VCC
R1 C1
2
IN+
FAN8412M/FAN8413M FAN8412/13M
4
C2
R2
INR3
Hall Sensor
The hall current (IH) is determined by R1, R2 and R3.
V CC I H = -----------------------------------R1 + R2 + R3
Where, the R2 is the impedance of hall sensor. An external capacitor, C1, can be used to reduce a power supply noise. In addition, C2 is to remove a noise which is caused in case the line is long from the hall sensor output to the hall input (pin 2 / 4) of the device. The input bias voltage of hall amplifier is between 1V and VCC-2V as following figure.
VCC VCC-2V VCC / 2
1V GND
It is recommended that R1 and R3 should have the same value to make the output signal of hall sensor centered as VCC/2.
7
FAN8412M/FAN8413M
Operation Truth Table
IN+ INOUTA OUTB AL TACO Remark
High Low Low or High
Low High Low or High
High Low Low or High
Low High Low or High
Low Low High
High Low Low or High
Rotating Lock
Test Circuits
VCC
1 ICC A VCC 1K 2
VCC
OUTB
8
IN+
OUTA
7 ILDC / ILDD
3
AL / TACO
LD
6
A
VLD 4 INGND 5
8
FAN8412M/FAN8413M
Typical Application Circuits1 (12V / 24V)
D2
VM
VS
D1 1 C3
VCC
OUTB 8
D3 Q1 R3
IN+ VCC VSignal R1 R5 Hall C2 3 AL / TACO 2
FAN8412M/ FAN8413M
LD
Commutation & Control
OUTA 7 R4
D4 Q2
6 C1
R2 IN4 GND
5
1 D1 : A reverse protection diode for IC. 2.D2 : A reverse protection diode for motor coil. 3.D3/D4 : Zener diode for freewheeling. 4.R1/R2 : A resister to set DC hall bias level. 5.R3/R4 : A resister to limit a base current of external power TR. 6. R5 : A pull-up resister for taco output signal when a fan motor is locked. 7. C1 : A Capacitor for lock protection and detection of a fan motor. If lock protection and detection functions are not necessary , LD pin should be connect ground. 8.C2 : A capacitor to reduce a noise in hall input stage. This is not necessary in case of no noise. 9.C3 : This is not necessary in case the stable input on VCC is provided. 10.Q1/Q2 : An external power TR .
9
FAN8412M/FAN8413M
Typical Application Circuits2 (48V)
D2 D1 R6 Q3 R7 VS C3 1 VCC OUTB 8 R3 D3
VM
Q1
IN+ VCC VSignal R1 R5 Hall C2 3 AL / TACO 2
FAN8412M/ FAN8413M
LD
Commutation & Control
OUTA 7 R4
D4 Q2
6 C1
R2 IN4 GND
5
1 D1 : A reverse protection diode for IC. 2.D2 : A reverse protection diode for motor coil. 3.D3/D4 : Zener diode for freewheeling. 4.R1/R2 : A resister to set DC hall bias level. 5.R3/R4 : A resister to limit a base current of external power TR. 6.R5 : A pull-up resister for taco output signal when a fan motor is locked. 7.R6/R7 : A resister to set a output voltage of TR(Q3). 8.C1 : A Capacitor for lock protection and detection of a fan motor. If lock protection and detection functions are not necessary , LD pin should be connect ground. 9.C2 : A capacitor to reduce a noise in hall input stage. This is not necessary in case of no noise. 10.C3 : This is not necessary in case the stable input on VCC is provided. 11.Q1/Q2 : An external power TR . 12.Q3 : An external power TR to control output voltage.
10
FAN8412M/FAN8413M
Package Dimensions (Unit: mm)
8-SOP-225
11
FAN8412M/FAN8413M
Package Dimensions (Unit: mm)
8-SOP Lead Free
12
FAN8412M/FAN8413M
Typical Performance characreristics
5
Current [mA]
Current [uA]
ICC
5
ILDC
4
4
3
3
2 -50 -25 0 25 50
O
75
100
-50
-25
0
25
50
O
75
100
Temperature [ C]
Temperature [ C]
1.6
Current [uA]
ILDD
1.4 1.2
4.0
Voltage [V]
VLDCL
3.5
1.0
3.0
0.8
2.5
0.6
0.4 -50 -25 0 25 50
O
75
100
2.0 -50 -25 0 25 50
O
75
100
Temperature [ C]
Temperature [ C]
Voltage [V]
0.9
VLDCP
12.0
Voltage [V]
VOH
11.5
0.8
11.0
0.7
10.5
0.6
10.0
-50
-25
0
25
50
O
75
100
-50
-25
0
25
50
O
75
100
Temperature [ C]
Temperature [ C]
13
FAN8412M/FAN8413M
Typical Performance characreristics(Continued)
0.5
Voltage [V]
VALL / VTACOL
0.4
0.3
0.2
0.1
0.0 -50 -25 0 25
O
50
75
100
Temperature [ C]
14
FAN8412M/FAN8413M
15
FAN8412M/FAN8413M
DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.
www.fairchildsemi.com
2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
3/19/04 0.0m 001 Stock#DSxxxxxxxx 2003 Fairchild Semiconductor Corporation

▲Up To Search▲

Price & Availability of FAN8412M

	To Download FAN8412M Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .