MP9518

Single-Phase, BLDC, Motor Driver

with Integrated Hall Sensor

MP9518 Rev.1.0

www.MonolithicPower.com

1

7/24/2017

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2017 MPS. All Rights Reserved.

DESCRIPTION

The MP9518 is a single-phase, brushless, DC

motor driver with integrated power MOSFETs

and a hall-effect sensor. The MP9518 drives

single-phase, brushless, DC fan motors with up

to 1.2A of output current limit. The IC has a

3.3V to 18V input voltage range and input line

reverse-voltage protection to save the external

diode on the supply line.

The MP9518 controls the rotational speed

through the PWM signal on the PWM pin. The

MP9518 has a rotational speed detector feature

and rotor lock fault indication on FG/RD with an

open-drain collector output. The output speed

versus the input duty curve can be programmed

easily for flexible use. To reduce fan driver

audible noise and power loss, the MP9518

features a soft on/off phase transition and

automatic phase-lock function of the motor

winding BEMF and current.

Full protection features include input over-

voltage protection (OVP), under-voltage lockout

(UVLO), rotor deadlocked protection, thermal

shutdown, and input reverse protection.

The MP9518 requires a minimal number of

external components to save solution cost. The

MP9518 is available in a TSOT23-6 package.

FEATURES

 Embedded Hall Sensor with High Sensitivity

 Wide 3.3V to 18V Operating Input Range

 Up to 1.2A Programmable Current Limit

 Integrated Power MOSFETs: Total 850mΩ

(HS + LS)

 Automatic Phase Lock Detection of Winding

BEMF and Current Zero-Crossing

 Soft On/Off Phase Transition

 Rotational Speed Indicator FG Signal

 12kHz to 48kHz PWM Input Frequency

Range

 Fixed 26kHz Output Switching Frequency

 Input Line Reverse-Voltage Protection (RVP)

 Rotor Deadlocked Protection and Automatic

Recovery

 Thermal Protection and Automatic Recovery

 Built-In Input OVP, UVLO, and Automatic

Recovery

 Available in a TSOT23-6 Package

APPLICATIONS

 CPU Fan for Personal Computers or

Servers

 Brushless DC Motors

All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For

MPS

green

status,

please

visit

the

MPS

website

under

Quality

Assurance.

“MPS” and “The Future of Analog IC Technology” are registered

trademarks of Monolithic Power Systems, Inc.

TYPICAL APPLICATION

OUT2

GND

1

2

3

6

5

4

VCC

PWM

FG/RD

OUT1

Motor

C1

R1