TPIC44L01 datasheet(17/24 Pages) TI

tên linh kiện	TPIC44L01

Giải thích chi tiết về linh kiện	4-CHAMMEL SERIAL AND PARALLEL LOW-SIDE PRE-FET DRIVER

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TPIC44L01, TPIC44L02, TPIC44L03

4CHANNEL SERIAL AND PARALLEL LOW SIDE PREFET DRIVER

SLIS062B – NOVEMBER 1996 – REVISED AUGUST 2001

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

PRINCIPLES OF OPERATION

inductive voltage transients

A typical application for the predriver/power FET circuit is to switch inductive loads. When an inductive load is

switched off, a large voltage spike can occur. These spikes can exceed the maximum VDS rating for the external

FET and damage the device when the proper protection is not in place. The FET can be protected from these

transients through a variety of methods using external components. The TPIC44L01, TPIC44L02, and

TPIC44L03 offer that protection in the form of a Zener diode stack connected between the DRAIN input and

GATE output (see Figure 18). Zener diode Z1 turns the FET on to dissipate the transient energy. GATE diode

Z2 is provided to prevent the gate voltage from exceeding 13 V during normal operation and transient protection.

DRAIN

GATE

LOAD

55 V

13 V

Power FET

VBAT

TPIC44L01/L02/L03

External

Figure 18

TPIC44L01 bảng dữ liệu(PDF) 17 Page - Texas Instruments