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AH285

Anachip
Part Number AH285
Manufacturer Anachip
Description Hall-Effect Smart Fan Motor Controller
Published May 10, 2007
Detailed Description AH285 Hall-Effect Smart Fan Motor Controller „ Features - On chip Hall sensor - Rotor-locked shutdown - Automatically re...
Datasheet PDF File AH285 PDF File

AH285
AH285


Overview
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 Only) This datasheet contains new product information.
Anachip Corp.
reserves the rights to modify the product specification without notice.
No liability is assumed as a result of the use of this product.
No rights under any patent accompany the sale of the product.
Rev.
1.
0 Sep 29, 2005 1/9 AH285 Hall-Effect Smart Fan Motor Controller „ Block Diagram (SIP5) Vdd 2 Lock shutdown and Automatic recovery Regulator 3 Hall Plate DO Amp.
Control Logic 4 DOB 5 GND 1 FG „ Typical Application Ci...


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