MP6543
12V, 2A, Three-Phase Power Stage
DESCRIPTION
FEATURES
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.
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
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.
APPLICATIONS
Three-Phase BLDC Motor Drivers
Internal safety features include thermal
shutdown, under-voltage lockout (UVLO), and
over-current protection (OCP).
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.
The MP6543, MP6543A, and MP6543B are
available in a 24-pin, 3mmx4mm QFN package
with an exposed thermal pad.
TYPICAL APPLICATION
MP6543/6543A/6543B Typical Application Circuit (QFN-24 3mmx4mm)
MP6543 Rev. 1.01
1/15/2020
www.MonolithicPower.com
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