MP6604C

– 4.5V TO 45V, 2.5A, SIMPLE DUAL H-BRIDGE DRIVER (HS/LS)

MP6604C Rev. 1.1

MonolithicPower.com

13

5/12/2023

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Over-C

urrent Protection (OCP)

OCP circuitry limits the current through the HS-

FET and LS-FET by disabling the gate driver. If

the over-current (OC) limit threshold is reached

and lasts for longer than the OC deglitch time

(tOCP), then all the MOSFETs in the H-bridge

are disabled and nFAULT is pulled low. The

driver remains disabled until the device is reset

by pulling nRESET low or by cycling the power

on the MP6604C.

OC conditions on the HS and LS devices (e.g.

an OC condition to ground, supply, or across a

motor winding) all result in an OC shutdown.

Over-Voltage Protection (OVP)

If VIN exceeds the OVP threshold (VOVP), then

the H-bridge output is disabled and nFAULT is

pulled low. The driver remains disabled until the

device is reset by pulling nRESET low or

cycling the power on the MP6604C.

Input

Under-Voltage

Lockout

(UVLO)

Protection

If VIN falls below the under-voltage lockout

(UVLO) threshold (VIN_UVLO), then all circuitry in

the device is disabled and the internal logic

resets. Once VIN exceeds VIN_UVLO, the device

starts up again and resumes normal operation.

Thermal Shutdown

If the die temperature exceeds safe limits, all

the MOSFETs in the H-bridge are disabled and

nFAULT

is

pulled

low.

Once

the

die

temperature

returns

to

a

safe

level,

the

MP6604C automatically starts up again and

resumes normal operation.