www.fairchildsemi.com FAN8412M/FAN8413M 2 Phase Half Wave BLDC Motor Predriver Features Description • 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 The FAN8412M/FAN8413M is a monolithic integrated circuit, and suitable for DC cooling fan motors predriver. 8-SOP-225 1 Typical Applications Ordering Information • DC cooling fan motor Device Package Operating Temp. FAN8412M 8-SOP-225 −40°C ~ 95°C FAN8412MX 8-SOP-225 −40°C ~ 95°C FAN8413M 8-SOP-225 −40°C ~ 95°C FAN8413MX 8-SOP-225 −40°C ~ 95°C FAN8412M_NL 8-SOP-225 −40°C ~ 95°C FAN8412MX_NL 8-SOP-225 −40°C ~ 95°C FAN8413M_NL 8-SOP-225 −40°C ~ 95°C FAN8413MX_NL 8-SOP-225 −40°C ~ 95°C Note X : Tape & Reel NL : Lead Free Rev.1.0.3 ©2004 Fairchild Semiconductor Corporation FAN8412M/FAN8413M Block Diagram VCC OUTB 1 8 IN+ Commutation & Control 2 OUTA 7 AL / TACO LD 3 6 IN- GND 4 5 Pin Definitions Pin Number Pin Name I/O 1 VCC P Supply voltage - 2 IN+ A Hall input + - AL O Alarm output (For FAN8412M) Open Collector Open Collector 3 2 Pin Function Description Remark TACO O Speed output (For FAN8413M) 4 IN− A Hall input − - 5 GND P Ground - 6 LD A Triangle pulse generator for lock detector and automatic restart - 7 OUTA A Motor output A - 8 OUTB A Motor output B - FAN8412M/FAN8413M Equivalent Circuits Description Pin No. OUTA 7 Internal Circuit Vcc Commutation OUTB 7 8 8 3 AL / TACO Lock detector 3 6 LD Lock detector & Automatic restart Commutation 6 VLDCP VLDCL Vcc IN+ 2 2 IN- 4 4 3 FAN8412M/FAN8413M Absolute Maximum Ratings (Ta = 25°C) Parameter Symbol Value Unit Maximum Power Supply Voltage VCCMAX 32 V Maximum Power Dissipationnote1 PDMAX 600 mW Thermal Resistancenote1 ΘJA 208 °C/W Maximum Output Voltage VOMAX 36 V Maximum Output Current IOMAX 0.07 A Alarm Output Current IAL 10 mA Alarm Output Withstanding Voltage VAL 36 V TACO Output Current ITACO 10 mA TACO Output Withstanding Voltage VTACO 36 V Operating Temperature TOPR −40 ~ 95 °C Storage Temperature TSTG −55 ~ 150 °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 Function Compensation Operating Voltage 4 Symbol Min. Typ. Max. Unit VCC 4.0 − 28.0 V FAN8412M/FAN8413M Electrical Characteristics (Ta=25°C, VCC=12V unless otherwise specified) Parameter Symbol Conditions Min. Typ. Max. Unit ICC When output is off. - 3.2 5.0 mA Pin2,4 Hall Input Range VHDC - 1 - Vcc-2 V Pin2,4 Hall Input Offest VHOF - 15 - - mV TOTAL Supply Current HALL AMPLIFIER INPUT RANGE LOCK DETECTOR & AUTO RESTART Pin6 Lock Detector Charging Current ILDC VLD=1.5V 2.2 3.8 5.7 µA Pin6 Lock Detector Discharging Current ILDD VLD=1.5V 0.4 0.88 1.6 µA Pin6 Lock Detector Charging/Discharging Ratio RCD RCD=ILDC/ILDD 3 5 7 − Pin6 Lock Detector Capacitor Clamp Voltage VLDCL - 2.54 2.94 3.34 V Pin6 Lock Detector Capacitor Comparator Voltage VLDCP - 0.54 0.74 0.94 V OUTPUT STAGE Pin7, 8 Output High Level Voltage VOH IO=10mA 10 10.5 - V Pin7, 8 Output Low Level Voltage VOL IO=10mA - - 0.5 V VALL IO=10mA - 0.2 0.5 V Pin3 Alarm Output Current Capacity IAL VAL=2.0V 8 - - mA Pin3 Taco Output Low Level Voltage VTACOL IO=10mA - 0.2 0.5 V Pin3 Taco Output Current Capacity ITACOL VTACO=2.0V 8 - - mA AL / TACO OUTPUT Pin3 Alarm Output Low Level Voltage 5 FAN8412M/FAN8413M Application Information 1. Lock Detection & Automatic Restart Hall Input Output TOFF TON VLDCL VLDCP AL TACO Motor lock detected Motor lock 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 2 FAN8412M/FAN8413M FAN8412/13M 4 C1 IN+ C2 R2 Hall Sensor INR3 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+ IN- OUTA OUTB AL TACO High Low High Low High Low Low or High Low or High Low or High Low or High Remark Low Low High High Low Low High Low or High Rotating Lock Test Circuits VCC ICC A VCC 1 VCC OUTB 8 2 IN+ OUTA 7 3 AL / TACO 1K ILDC / ILDD LD 6 A VLD 4 8 IN- GND 5 FAN8412M/FAN8413M Typical Application Circuits1 (12V / 24V) VM D2 VCC D1 VS D3 OUTB 1 8 C3 IN+ 2 VCC R1 R5 C2 3 Commutation & Control OUTA AL / D4 7 FAN8412M/ FAN8413M VSignal Hall Q1 R3 Q2 R4 LD 6 TACO 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) VM D2 D1 R6 Q3 R7 VCC 1 VS D3 OUTB 8 C3 IN+ 2 VCC R1 R5 C2 3 Commutation & Control OUTA AL / D4 7 FAN8412M/ FAN8413M VSignal Hall Q1 R3 Q2 R4 LD 6 TACO 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 [uA] Current [mA] ICC ILDC 5 4 4 3 3 2 -50 -25 0 25 50 75 -50 100 -25 0 25 Temperature [ C] 1.6 50 75 100 O Temperature [ C] O Current [uA] 4.0 ILDD Voltage [V] VLDCL 1.4 3.5 1.2 1.0 3.0 0.8 2.5 0.6 0.4 -50 -25 0 25 50 75 100 2.0 -50 -25 0 25 O Temperature [ C] 50 75 100 O Temperature [ C] Voltage [V] VLDCP 12.0 Voltage [V] VOH 0.9 11.5 0.8 11.0 0.7 10.5 0.6 10.0 -50 -25 0 25 50 O Temperature [ C] 75 100 -50 -25 0 25 50 75 100 O 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 50 O Temperature [ C] 14 75 100 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. 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. www.fairchildsemi.com 3/19/04 0.0m 001 Stock#DSxxxxxxxx 2003 Fairchild Semiconductor Corporation