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MA7151F/R

Major Power Technology Co., Ltd.

Rev.1.0 Sep.18, 2017

Low Noise & Low voltage

Single-Coil Fan/Motor Driver



GENERAL DESCRIPTION

The MA7151 is an integrated Hall sensor with H-Bridged output driver designed for

brushless DC motor applications. The device includes an on-chip Hall sensor for magnetic

sensing, an amplifier that amplifies the Hall voltage, a comparator to provide switching

hysteresis for noise rejection, a bi-directional drivers for sinking and driving large current load.

To avoid coil burning, rotor-lock shutdown detection circuit shut down the output driver if

the rotor is blocked and then the automatic recovery circuit will try to restart the motor. This

function repeats while rotor is blocked. Until the blocking is removed, the motor recovers

running normally.



FEATURES

- On-Chip High sensitivity Hall-effect Sensor

- Operating Voltage: 1.8V to 5.5V

- H-Bridge Output Drivers for Single Coil

- Thermal Shutdown and Reverse voltage Protection

- Low Output Switching Current Noise

- -40°C to 125°C Operating Temperature

- Rotor-locked shutdown and automatically restart function

- For 3V and 5V DC Motor / FAN systems

- Low Profile SOT23-6L ,TSOT23-6L , SOT23-6F and TDFN 2X2-6L Package



BLOCK DIAGRAM

Hall

Plate

Control

Logic

Regulator

H-bridge

MOS

Driver

PWM

OUT2

OUT1

Amp.

GND

Thermal

shutdown

Rotor-locked

shutdown and

automatically restart

PWM

Control

VDD

FG/RD