MP6546

– 22V, 3A PEAK, 3-PHASE BLDC DRIVER WITH 1MHZ I2C INTERFACE

MP6546 Rev. 1.0

MonolithicPower.com

14

3/20/2023

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disabled by default. Set OVP_EN in register 00h

to 1 to enable OVP.

Under-Voltage Lockout (UVLO)

When the voltage on the VIN pin (VIN) falls below

the under-voltage lockout (UVLO) threshold, all

circuitry in the device is disabled and the internal

logic is reset. Operation resumes when VIN

exceeds the UVLO threshold.

Fault Output Indication

The MP6546 provides an nFT output pin that is

driven active low in the event of a fault condition,

such as SCP, thermal shutdown, or OVP. This

pin is an open-drain output that must be pulled

up by an external resistor. If an error is detected,

the related register bit(s) is set to 1.

3.3V LDO Output

An internal LDO regulator generates a 3.3V

voltage with a 100mA capacity, which could be

used to power a small, low-power MCU.

A bypass capacitor between

4.7μF and 10μF

must be connected from the 3.3V pin to the

ground (see C4 in the Typical Application

Circuits section on page 21).

Charge Pump

A charge pump generates the gate drive for the

HS-FETs. The charge pump requires one

external capacitor placed between VIN and VCP.

A ceramic

capacitor of 1μF rated at least 10V is

recommended (see C3 in Typical Application

Circuits on page 21).