MP6545

45V, 2.5A, Simple

Three-Phase Power Stage

MP6545 Rev. 1.1

MonolithicPower.com

1

5/12/2023

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© 2023 MPS. All Rights Reserved.

DESCRIPTION

The MP6545 is a three-phase power stage IC

designed to drive brushless DC (BLDC) motors

or other loads.

The MP6545 operates across a 4.5V to 45V

input voltage (VIN) range. It can deliver an

output current (IOUT) up to 2.5A per phase,

depending on the ambient temperature (TA) and

PCB layout.

Internal safety and diagnostic features include

over-current

protection

(OCP),

input

over-

voltage protection (OVP), input under-voltage

lockout (UVLO), and thermal shutdown.

The MP6545 has separate high-side (HS) and

low-side (LS) input pins for each output pin. The

MP6545 is available in QFN-28 (4mmx5mm)

and TSSOP-28EP packages.

FEATURES

• 4.5V to 45V Operating Input Voltage (V

IN)

Range

• 2.5A Maximum Output Current (I

OUT_MAX)

• Three-Channel Half-Bridge (HB) Driver

• Low 150mΩ On Resistance (R

DS(ON)) per

MOSFET

• Protection Functions Include:

o

Over-Current Protection (OCP)

o

Over-Voltage Protection (OVP)

o

Under-Voltage Lockout (UVLO)

o

Over-Temperature (OT) Shutdown

o

Fault Indication Output

• Available in QFN-28 (4mmx5mm) and

TSSOP-28EP Packages

APPLICATIONS

• Brushless DC (BLDC) Motors

• Laser Printers and Copiers

• Textile Machines

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

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

TYPICAL APPLICATION

CPA

CPB

VIN

VCP

OUT1

OUT2

OUT3

HS1

nFAULT

µC

VIN

MP6545

PGND

LS1

GND

HS3

LS3

GND

HS2

LS2

nSLEEP

nRESET

VREG