描述 Description

The MP6543C is a three-phase brushless DC (BLDC) motor driver with three integrated half-bridges, consisting of six N-channel power MOSFETs, as well as six pre-drivers, two gate driver power supplies, and three current-sense amplifiers. Each half-bridge includes an enable (EN) input and pulse-width modulation (PWM) input. The MP6543C can achieve up to 1.2A of continuous output current (IOUT) across a 3V to 22V input voltage (VIN) range.

The internal current-sense circuit does not require a low-ohmic shunt resistor. Each half-bridge has an independent ground pin (LSSA, LSSB, and LSSC) that allows current to be measured via an external shunt resistor. This allows the MP6543C to be used for different application requirements.

An internal charge pump generates the gate driver supply voltage for the high-side MOSFETs (HS-FETs). A trickle-charge circuit maintains a sufficient gate driver voltage for 100% duty cycle operation.

Full protection features include configurable over-current protection (OCP), under-voltage lockout protection (UVLO), and thermal shutdown. The MP6543C is available in a QFN-24 (3mmx4mm) package with an exposed thermal pad.

特性 Features

? 3V to 22V Operating Input Voltage (VIN) Range
? Three Integrated Half-Bridge Drivers
? 1.2A Continuous Output Current (IOUT)
? 110mΩ RDS(ON) per MOSFET
? Enable (EN) Input and Pulse-Width Modulation (PWM) Input
? 3.3V, 100mA Built-In Low-Dropout (LDO) Regulator
? Internal Charge Pump for 100% Duty Cycle
? Automatic Synchronous Rectification
? Integrated Bidirectional Current-Sense Amplifiers
? Configurable Over-Current Protection (OCP)
? Under-Voltage Lockout (UVLO) Protection
? Thermal Shutdown
? Available in a QFN-24 (3mmx4mm) Package