FAN8412M_NL

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. −40°C ~ 95°C −40°C ~ 95°C −40°C ~ 95°C −40°C ~ 95°C −40°C ~ 95°C −40°C ~ 95°C −40°C ~ 95°C −40°C ~ 95°C Rev.1.0.3 ©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 = 25°C) 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 ΘJA 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 = 25°C) Parameter Symbol Min. Typ. − Max. Unit Function Compensation Operating Voltage VCC 4.0 28.0 V 4 FAN8412M/FAN8413M Electrical Characteristics (Ta=25°C, 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 µA µA − 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 × ( V LDCL – V LDCP ) T ON = ---------------------------------------------------------------------I LDC T OFF C × (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