AH5771 データシートの表示（PDF） - Diodes Incorporated.

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AH5771

SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER

Diodes Incorporated. 

Features

AH5771

SINGLE PHASE HALL EFFECT LATCH SMART FAN

MOTOR CONTROLLER

General Description

• Support single-phase full wave min fan driver

• Built-in Hall sensor input amplifier

• Low voltage startup ( Vdd=2.5V )

• Lock detection and automatic self-restart

• Without external timing capacitor, Reduces the

numbers of external component required

• Low profile package : SIP-4L

• SIP-4L: Available in “Green” Molding Compound

(No Br, Sb)

• Lead Free Finish / RoHS Compliant (Note 1)

AH5771 is the integrated Hall sensor with output drivers designed

for electrical commutation of brush-less DC motor application.

The device is as follows: one-chip Hall voltage generator for

magnetic sensing; the error amplifier that amplifies the Hall

voltage; a comparator is to provide switching hysteresis for noise

rejection; the full bridge driver for sinking and driving current load.

Internal band gap regulator is used to provide temperature

compensated bias for internal circuits and allows a wide

operating supply voltage range. The device includes features

such as Rotor Lock Protection with rotor lock detection and

automatic self-restart to avoid damage to the coil when the rotor

is blocked. AH5771 is rated for operation over-temperature range

from -40℃ to 100℃ and voltage range from 2.5V to 15V. The

device is available in low profile package SIP-4L.

Typical Application Circuit

POWER

D1

V dd

AH5771

O1

O2

D2

C

V SS

Note: D2 (Zenor Diode) and Capacitor C are for power stabilization, D2 is recommended to be 18Vz (option),

C is recommended to 0.1uF ~1uF (E-Cap). D1 (reverse Diode) is for reverse voltage protection.

AH5771 Rev. 3

DS31656

1 of 6

www.diodes.com

JUNE 2009

© Diodes Incorporated

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