Diodes AH5771 User Manual

AH5771

SINGLE PHASE HALL EFFECT LATCH SMART FAN

MOTOR CONTROLLE R

Features

• Support single-phase full wave min fan driver

• Built-in Hall sensor input amplifier

• Low voltage startu p ( 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)

Typical Application Circuit

POWER

General Description

AH5771 is the integrated Hall sensor with output driv ers 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 driv ing 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.

AH5771

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 1 of 6 JUNE 2009

DS31656

www.diodes.com © Diodes Incorporated

Ordering Information

AH5771

SINGLE PHASE HALL EFFECT LATCH SMART FAN

MOTOR CONTROLLE R

A H 5 771 - P G - B

Package

P : SIP-4L

Device

AH5771-PG-B P SIP-4L 1000 -B

Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at

http://www.diodes.com/datasheets/ap02001.pdf.

http://www.diodes.com/products/lead_free.html

2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

Package Code

Green

G : Green

Packaging

(Note 2)

Quantity Part Number Suffix

Packing

B : Bulk

Bulk

Pin Assignment

( Top View )

5771

1 : Vdd 2 : O1

3 : O2 4 : Vss

12 43

SIP-4L

Pin Description

Pin Name

Vdd 1 Power supply pin

O1 2 Output driving & sinking pin O2 3 Output driving & sinking Pin

VSS 4 Ground pin

AH5771 Rev. 3 2 of 6 JUNE 2009

DS31656

Pin No.

Description

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