MIC4607A datasheet(21/41 Pages) MICROCHIP

No de pièce	MIC4607A

Description	85V, Three-Phase MOSFET Driver with Adaptive Dead-Time, Anti-Shoot-Through and Overcurrent Protection

PDF	41 Pages

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Fabricant	MICROCHIP [Microchip Technology]

Site Internet	http://www.microchip.com

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DS-20006957A-page 21

MIC4607A

5.7.2

DLY

A capacitor connected to the DLY pin determines the

amount of time the gate drive outputs are latched off

before they can be restarted.

During normal operation, the DLY pin is held low by an

internal MOSFET. After an overcurrent condition is

detected, the MOSFET turns off and the external

capacitor is charged up by an internal current source.

The outputs remain latched off until the DLY pin voltage

reaches the VDLY+ threshold (typically 1.5V).

The delay time can be approximately calculated using

Equation 5-1.

EQUATION 5-1:

5.7.3

FLT/

This open-drain output is pulled low while the gate drive

outputs are latched off after an over-current condition.

It will de-assert once the DLY pin has reached the

VDLY+ threshold and a rising edge occurs on any LI pin

(for the MIC4607A-1) or a falling edge on any PWM pin

(MIC4607A-2).

During normal operation, the internal pull-down MOS-

FET is of the pin is high impedance. A pull-up resistor

must be connected to this pin.

tDLY

CDLY VDLY-



IDLY

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MIC4607A Fiches technique(PDF) 21 Page - Microchip Technology