STPIC44L02 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STPIC44L02

4 CHANNEL SERIAL AND PARALLEL LOW SIDE PRE-FET DRIVER

STMicroelectronics 

STPIC44L02

turned off. After the deglitch delay time, the drain

is checked to verify that it is greater than the fault

reference voltage. When it is less than the

reference voltage, a fault is flagged to the

microcontroller through FLAT that an open-load

fault condition exists. The microcontroller can then

read the serial port on the STPiC44L02 to isolate

the channel that reported the fault condition. Fault

bits 0-3 distinguish faults for each of the output

Figure 17 : Open Load Short Circuit test Circuitry

channels. Figures 18 and 19 illustrate the

operation of the open-load detection circuit. This

feature provides useful information to the

microcontroller to isolate system failures and warn

the operator that a problem exists. Examples of

such applications would be a warning that a light

bulb filament may be open, solenoid coils may be

open, etc.

Figure 18 : Normal Condition Driving Load

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