MP6538

100V, Three-Phase, BLDC Motor

Pre-Driver with Hall Signal Interface

MP6538 Rev. 1.01

www.MonolithicPower.com

1

4/20/2018

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© 2018 MPS. All Rights Reserved.

DESCRIPTION

The MP6538 is a gate driver IC designed for

three-phase,

brushless

DC

motor

driver

applications. The MP6538 is capable of driving

three half-bridges consisting of six N-channel

power MOSFETs up to 100V.

The MP6538

uses

bootstrap capacitor to

generate a supply voltage for the high-side

MOSFET driver. An internal charge pump

maintains the high-side gate driver if the output

is held high for an extended period of time.

Full protection features include programmable

over-current protection (OCP), adjustable dead-

time control, under-voltage lockout (UVLO), and

thermal shutdown.

The MP6538 has three hall-sensor inputs.

Commutation logic is determined by three Hall

element inputs spaced at 120°. The PWM, DIR,

and nBRAKE inputs are used to control motor

speed, position, and torque.

The

MP6538

is

available

in

a

QFN-28

(4mmx5mm) package with an exposed thermal

pad.

FEATURES

 Supports 100V Operation

 Hall Sensor Inputs

 120V V

 Internal LDO Supports External NPN for

High-Current Drive Requirements

 Integrated Current-Sense Amplifier

 Low-Power Sleep Mode

 Programmable Over-Current Protection

(OCP) of External MOSFETs

 Adjustable Dead-Time Control to Prevent

Shoot-Through

 Thermal Shutdown and Under-Voltage

Lockout (UVLO) Protection

 Fault Indication Output

 Available in a Thermally Enhanced Surface-

Mounted QFN-28 (4mmx5mm) Package

APPLICATIONS

 Three-Phase Brushless DC Motors and

Permanent Magnet Synchronous Motors

 Power Drills

 E-Bikes

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

LSS

HA

HB

HC

OCREF

nFAULT

VIN

MP6538

Exposed GND

PAD

PWM

DIR

nBRAKE

GLA

GHA

SHA

Phase A

(repeat for B and C)

To Phase B

To Phase C

GND

BSTA

VREG

nSLEEP

VIN

LDO

DT

CSO