AH287

Features:

- On chip Hall sensor
- Rotor-locked shutdown
- Automatically restart
- Built-in Zener protection for output driver
- Operating voltage: 3.8V~28V
- Output current: IO(AVE) = 400mA
- Package: SIP-4L, SOT89-5L




Specifications

Part Number	AH287
Output	Comp.
Description	High Voltage Hall Effect Smart Fan Motor Controller
Operating Voltage (V)	3.8 to 28
Typical Supply Current (Ave)
Output Current (Ave)	400mA
Operating Point Bop (Gauss)	5/60
Release Point Brp (Gauss)	-60/-5
Operating Ambient Temp Range (°C)	-40 to +100

Characteristics	Symbol			Rating	Unit
Supply Voltage	VCC			300	V
Output Current	IO(AVE)	SLP4/SOT89-5		400	mA
	LO(PEAE)			700
Power Dissipation	PD	SIP4		550	mW
		SOT89 -5		880
Operating Temperature	Topr			-40 ~ 100	°C
Storage Temperature	Tstg			-55 ~ 150	°C
Maximum Junction Temp	Tj			150	°C
Thermal Resistance	jc		STP4	277	°C/W
			SOI89 -5	156	°C/W

Description

AH287 is a monolithic fan motor controller with Hall sensor's capability. It contains two complementary open-drain drivers for motor's coil driving, automatic lock shutdown and restart function 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 of AH287 repeats while rotor is blocked. Until the blocking is removed, the motor recovers running normally.