General Description

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.

Features

• 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)