MP6543

12V, 2A, Three-Phase Power Stage

MP6543 Rev. 1.01

www.MonolithicPower.com

1

1/15/2020

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DESCRIPTION

The MP6543 family of products are all three-

phase brushless DC motor drivers. They

integrate three half-bridges, consisting of six N-

channel power MOSFETs, along with pre-

drivers, gate drive power supplies, and current-

sense amplifiers.

The MP6543 has ENABLE and PWM inputs for

each ½-H-bridge. The MP6543A has separate

high-side and low-side inputs, while the

MP6543B has Hall-element inputs. Otherwise,

they are similar. References to the MP6543 in

this document apply to the other parts, unless

otherwise noted.

The MP6543 is able to deliver up 2A

continuously (depending on thermal and PCB

conditions), with the adjustable over-current

protection threshold. It uses an internal charge

pump to generate the gate drive supply voltage

for the high-side MOSFETs, and a trickle-

charge circuit to maintain sufficient gate drive

voltage to operate at 100% duty cycle.

Internal

safety

features

include

thermal

shutdown, under-voltage lockout (UVLO), and

over-current protection (OCP).

The MP6543, MP6543A, and MP6543B are

available in a 24-pin, 3mmx4mm QFN package

with an exposed thermal pad.

FEATURES

 3V to 12V Operating Supply Voltage

 Three Integrated Half-Bridge Drivers

 2A Continuous Output Current

 MOSFET On Resistance: 110mΩ per FET

 MP6543: ENBL & PWM Inputs

MP6543A: LS & HS Inputs

MP6543B: Hall-Signal Inputs

 Built-In 3.3V, 100mA LDO Regulator

 Internal Charge Pump Supports 100% Duty

Cycle Operation

 Automatic Synchronous Rectification

 Under-Voltage Lockout (UVLO) and

Thermal Shutdown Protection

 Over-Current Protection (OCP) with

Adjustable Threshold

 Integrated Bidirectional Current-Sense

Amplifiers

 Available in a QFN-24 (3mmx4mm)

Package

APPLICATIONS

 Three-Phase BLDC Motor Drivers

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

directive. For MPS green status, visit the MPS website under Quality

Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are

registered trademarks of Monolithic Power Systems, Inc. or its subsidiaries.

TYPICAL APPLICATION

MP6543/6543A/6543B Typical Application Circuit (QFN-24 3mmx4mm)