FAN8408D

www.fairchildsemi.com FAN8408D 2 Phase Half Wave BLDC Motor Driver Features A wide range of operation voltage: 4V to 15V Built-in motor lock detector. Automatic restart function Hall output for a motor speed detection Built-in thermal shut down circuits Built-in reverse current protection diode Compact package: 8-SOP-225 Description The FAN8408D is a monolithic integrated circuit, and suitable for DC cooling fan motors. 8-SOP-225 1 Typical Applications DC cooling fan motor Ordering Information Device FAN8408D FAN8408DTF Package 8-SOP-225 8-SOP-225 Operating Temp. −25°C ~ 85°C −25°C ~ 85°C Rev.1.0.4 ©2002 Fairchild Semiconductor Corporation FAN8408D Block Diagram OUTB 1 3 LD 2 Commutation & Control & TSD HO OUTA 7 VCC GND 4 5 6 IN+ IN- 8 Pin Definitions Pin Number 1 2 3 4 5 6 7 8 Pin Name OUTB HO LD VCC IN+ IN− OUTA GND I/O O O I I O Pin Function Description Motor output B Hall output Triangle pulse generator for lock detector and automatic restart Supply voltage Hall input + Hall input − Motor output A Ground Remark Open Collector - 2 FAN8408D Equivalent Circuits Description OUTB OUTA Pin No. 1 7 1 7 Commutation Internal Circuit HO 2 2 Commutation LD 3 3 Lock detector & Automatic restart Commutation VLDCP VLDCL IN+ IN- 5 6 5 6 Commutation 3 FAN8408D Absolute Maximum Ratings (Ta = 25°C) Parameter Maximum power supply voltage Maximum power dissipationnote1 Thermal resistancenote1 Maximum output voltage Maximum output current...