MP6619

– 5.4V TO 28V, 5A, H-BRIDGE MOTOR DRIVER

MP6619 Rev. 1.0

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9

1/21/2021

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The driver remains disabled for tOCP and is re-

enabled automatically.

Input Over-Voltage Protection (OVP)

During operation, the energy stored in the load

current is delivered to the input side during the

freewheeling time. If VIN and the output current

(IOUT) are high enough, the energy sent back to

the input side causes VIN to rise up. To avoid IC

damage due to a high voltage spike, the IC

employs input voltage protection.

If voltage applied to the VIN pin is above the

OVP threshold, the H-bridge output is disabled

and nFAULT is driven low. This protection is

released when VIN drops to a safe level.

Junction Over-Temperature Protection (OTP)

If the die temperature exceeds safe limits, all H-

bridge MOSFETs are disabled and nFAULT is

driven low. Once the die temperature has fallen

to a safe level, normal operation resumes

automatically.

Fault Indication Output (nFAULT)

The MP6619 provides an nFAULT pin that is

driven active low if any of the protection circuits

are activated. These fault conditions include

over-current (OC), over-temperature (OT), and

over-voltage (OV). nFAULT is also driven low

when a current-limit trip occurs. nFAULT is an

open-drain output, and requires an external

pull-up resistor. Once any fault conditions are

removed, nFAULT is pulled inactive high by the

pull-up resistor.

Enable/Disable (EN)

To enable the MP6619, apply a logic high

signal to EN, and the high-level signal time

needs to be above about 10µs. Pull EN to logic

low, and set the low-level signal above 100ns to

shut down the IC.