AH285
Hall-Effect Smart Fan Motor Controller Features
- On chip Hall sensor - Rotor-locked shutdown - Automatically re...
AH285
Hall-Effect Smart Fan Motor Controller Features
- On chip Hall sensor - Rotor-locked shutdown - Automatically restart - Frequency generator (FG) output - Buil t-in Zener protection for output driver - Operating voltage: 3.8V~20V - Output current: IO(AVE) = 500mA for SIP-5/SOT89-5 - Output current: IO(AVE) = 400mA for SOT23-5 - Package: SIP-5L, SOT23-5L, SOT89-5L
General Description
AH285 is a monolithic fan motor controller with Hall sensor’s capability. It contains two complementary open-drain
transistors as motor coil drivers, automatic lock current shutdown, and recovery protections. Additional, frequency generator (FG) output is for speed detection relatively. To avoid coil burning, rotor-lock shutdown detection circuit shut down the output driver if the rotor is blocked and then the automatic recovery circuit will try to restart the motor. This function repeats while the rotor is blocked. Until the blocking is removed, the motor recovers running normally.
Pin Configuration
285 ( Front View )
1 : FG 2 : Vdd 3 : DO 4 : DOB 5 : GND
1 2 3 4 5
Pin Descriptions
Symbol FG Vdd DO DOB GND Description Frequency generation Input power Output pin Output pin Ground
SIP-5L
Vdd 5 Vdd 1 GND 2 DO 3 SOT89-5L 285 7 4 DOB 5 FG 285 DOB 4
1 FG
2
3
GND DO SOT23-5
Ordering Information
AH285 X - X X X
Wafer Body Blank or A~Z : if necessary to specify
Package P: SIP-5L W: SOT23-5L Y: SOT89-5L
Lead L : Lead Free
Packing Blank : Bulk A : Tape & Reel (for SOT Packages On...