STPIC44L02 STMicroelectronics, STPIC44L02 Datasheet - Page 12

• Manufacturer Part Number: STPIC44L02
• Description: 4 CHANNEL SERIAL AND PARALLEL LOW SIDE PRE-FET DRIVER
• Manufacturer: STMicroelectronics

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STPIC44L02
Figure 12 : 8-Bit Serial Programming Example (two predrivers cascated)
Figure 13 : Fault Reading Example
PARALLEL INPUT DATA OPERATION
In addition to the serial interface the STPIC44L02
also
microcontroller. The output turns on when either
the parallel or the serial interface make it turn on.
The parallel data terminals are real time control
inputs for the outputs drivers. SCLK and CS are
not required to transfer parallel input data to the
output buffer. Fault data must be read over the
serial data bus as described in the serial data
operation section of this datasheet (see figure 13).
The parallel input must be transitated low and then
high to clear and reenable a gate output after it
has been disabled due to a shorted load fault
condition.
CHIPSET
CONDITIONS
The STPIC44L02 and power FET arrays are
designed for normal operation over a battery
12/21
provides
PERFORMANCE
a
parallel
interface
UNDER
to
FAULT
the
voltage range of 8V to 24V with load fault
detection from 4.8V to 34V. It offers onboard fault
detection to handle a variety of faults that may
occur within a system. The circuits primary
function is to prevent damage to the load and the
power FETs in the event that a fault occurs.
Note that unused DRAIN0-DRAIN3 inputs must
be connected to V
prevent false reporting of open load fault
conditions. The circuitry detects the fault, shuts off
the output to the FET and reports the fault to the
microcontroller.
consideration are:
1) Shorted Load
2) Open Load
3) over battery voltage shutdown
4) Under battery voltage shutdown.
SHORTED LOAD FAULT CONDITION
BAT
The
through a pull-up resistor to
primary
faults
under