APX9270

APX9270 Direct PWM Variable Speed Fan Motor Driver Features Single Phase Full Wave Fan Driver Low Quiescent Current (6mA Typical) Built-in Variable Speed Function Current Limit Circuit (includes both internal and external Current Limit) Built-in Lock Protection and Auto Restart Function FG (rotation speed detection) Output Soft Switching Circuit (before phase change, enabling low-consumption, low loss and low noise drive.) Over Voltage Protection (16.5V Typical) Built-in Kickback Absorption Circuit Built-in Thermal Protection Circuit Lead Free and Green Devices Available (RoHS Compliant) General Description The APX9270 is a single phase, DC brushless motor driver with PWM variable speed control and current limit features suitable for the fan of personal computer’ s power supply and CPU cooler. The PWM control system includes thermistor input signal and direct PWM input signal, enabling highly silent and low vibration speed control. The device is equipped with a built-in lock protection, which protects the fan when it is locked. It also has rotation speed detection output and thermal protection function. The APX9270 is available in SSOP-20 and TSSOP-20P packages (see Pin Configurations). Applications CPU Coolers Variable Speed Control Fans Ordering and Marking Information APX9270 Assembly Material Handling Code Temperature Range Package Code APX9270 XXXXX Package Code N : SSOP-20 R: TSSOP-20P Operating Ambient Temperature Range I : -40 to 90 oC H...