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AH5771

Diodes Incorporated
Part Number AH5771
Manufacturer Diodes Incorporated
Description SINGLE PHASE HALL EFFECT LATCH SMART FAN
Published Feb 1, 2011
Detailed Description Features AH5771 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER General Description • Support single-phase f...
Datasheet PDF File AH5771 PDF File

AH5771
AH5771

Overview
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 Ordering Information AH5771 SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER A H 5 771 - P G - B Package P : SIP-4L Green G : Green Packing B : Bulk Device AH5771-PG-B Package Code P Packaging (Note 2) SIP-4L Quantity 1000 Bulk Part Number Suffix -B Notes: 1.
EU Direc...


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