TPIC44L01, TPIC44L02, TPIC44L03

4CHANNEL SERIAL AND PARALLEL LOW SIDE PREFET DRIVER

18

POST OFFICE BOX 655303

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

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.

_

+

_

+

U1

A

M

U

X

1.25 V

DRAIN3

DRAIN0

VCOMP

VCOMPEN

Deglitch

FLT

External

TPIC44L01/L02/L03

VCOMPEN

1.25 V

VCOMP

0

1

Figure 19