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.

Feature(s)

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

Specifications & Technical Documents

Product Parameters

Operating Voltage (V)	2.5 to 15 V
SupplyCurrent (mA)	3.5 mA
Average OutputDrive Current (mA)	200 mA
Peak Output Current (mA)	400 mA
Typical Total R_DS(ON)(NMOS and PMOS Combined)	5.5 @ 5V Ω
Operating Point Bop Gauss (Min)	10
Operating Point Bop Gauss (Typ)	30
Operating Point Bop Gauss (Max)	50
Release Point Brp Gauss (Min)	-50
Release Point Brp Gauss (Typ)	-30
Release Point Brp Gauss (Max)	-10
Soft-Switch	-
Speed Control	VDD
Lock Detect, Shut-Down and Auto Start	Yes
Frequency Generator (FG) and Rotation Detect	- RD
Operating Ambient Temperature (°C)	-40 to 100 °C

Technical Documents

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

RoHSFile

Purchase & Availability

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products

AH5771 (Obsolete)