TPIC44L01DBRG4 Datasheet, PDF (18/24 Pages) Texas Instruments – 4-CHAMMEL SERIAL AND PARALLEL LOW-SIDE PRE-FET DRIVER

TPIC44L01, TPIC44L02, TPIC44L03
4ĆCHANNEL SERIAL AND PARALLEL LOWĆSIDE PREĆFET DRIVER
SLIS062B – NOVEMBER 1996 – REVISED AUGUST 2001
PRINCIPLES OF OPERATION
external fault reference input
The TPIC44L01, TPIC44L02, and TPIC44L03 compare each channel drain voltage to a fault reference to detect
shorted-load and open-load conditions. The user has the option of using the internally generated 1.25-V fault
reference or providing an external reference voltage through VCOMP. The internal reference is selected by
connecting VCOMPEN to GND and VCOMP is selected by connecting VCOMPEN to V_CC (see Figure 19).
Proper layout techniques should be used in the grounding network for the VCOMP circuit on the TPIC44L01,
TPIC44L02, and TPIC44L03. The ground for the predriver and VCOMP network should be connected to a
Kelvin ground if available; otherwise, they should make single-point contact back to the power ground of the
FET array. Improper grounding techniques can result in inaccuracies in detecting faults.
External
TPIC44L01/L02/L03
DRAIN3
+
_
DRAIN0
U1
+
_
FLT
VCOMP
VCOMPEN
1.25 V
A
M
U
X
Deglitch
VCOMPEN
1.25 V
0
VCOMP
1
Figure 19
18
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