1/6

MA284

Major Power Technology Co., Ltd.

Rev.1.3

28

th, Aug., 2019

Complementary Output Hall Effect Fan Driver



GENERAL DESCRIPTION

MA284 is integrated Hall sensors with output drivers, mainly designed for electronic

commutation of brush-less DC Fan. This IC is using HV BCD process internally includes the

regulator, protecting diode, Hall plate, amplifier, comparator, and a pair of complementary

open-Drain outputs (DO, DOB).

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

-

Built-in protecting diode only for chip reverse power connecting

-

Wide operating voltage range: 3.5V~18V

-

Output sink current up to 0.6A

-

On-Chip High sensitivity Hall-effect Sensor

-

Thermal Shutdown Protection

-

-40°C to 105°C Operating Temperature

-

Rotor-locked shutdown and automatically restart function

-

For 5V and 12V DC motor / FAN systems

-

Low Profile SIP-4L Package



PIN ASSIGNMENT

The package of MA284 is SIP-4L; the pin assignment is given by:

1.10mm

1.9mm

1

VDD

2

DO

3

DOB

(Top View)

SIP-4L

4

GND

(Sensor Location)

Name

Description

VDD

Supply Voltage

DO

Output 1

DOB Output 2

GND Ground.