STPIC44L02 datasheet(14/21 Pages) STMICROELECTRONICS

Part #	STPIC44L02

Description	4 CHANNEL SERIAL AND PARALLEL LOW SIDE PRE-FET DRIVER

PDF	21 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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14 / 21 page

STPIC44L02

14/21

Figure 15 : Normal Operation

Figure 16 : Shorted Load Condition (Deglitch Time)

OPEN LOAD

The STPiC44L02 monitors the drain of each

power FET for open circuit conditions that may

exist. The 60

µA current source is provided to

monitor open load fault conditions. Open-load

faults are only detected when the power FET is

turned off. When load impedance is open or

substantially high, the 60µA current source has

adequate drive to pull the drain of T1 below the

fault reference threshold on the detection circuit.

Unused

DRAIN0-DRAIN3

inputs

must

connectedtoVBAT through a pull-up resistor to

prevent

false

reporting

open-load

fault

conditions. The on-board deglitch timer starts

running when the STPiC44L02, gate output to the

power FET transitates to the off state. The timer

provides a 60ms deglitch time, T(STBFM),to allow

the drain voltage to stabilize after the powerFET

has been turned off. The deglitch time is only

enabled for the first 60ms after the FET has been

STPIC44L02 Datasheet(PDF) 14 Page - STMicroelectronics