Data Sheet

4

Rev. 1.0, 2009-03-31

High Current PN Half Bridge

BTN7975B

Block Diagram

2

Block Diagram

The BTN7975B is part of the NovalithIC™ family containing three separate chips in one package: One p-channel

highside MOSFET and one n-channel lowside MOSFET together with a driver IC, forming an integrated high

current half-bridge. All three chips are mounted on one common lead frame, using the chip on chip and chip by

chip technology. The power switches utilize vertical MOS technologies to ensure optimum on state resistance.

Due to the p-channel highside switch the need for a charge pump is eliminated thus minimizing EMI. Interfacing

to a microcontroller is made easy by the integrated driver IC which features logic level inputs, diagnosis with status

flag, slew rate adjustment, dead time generation and protection against overtemperature, overvoltage,

undervoltage, overcurrent and short circuit. The BTN7975B can be combined with other BTN7975B to form H-

bridge and 3-phase drive configurations.

2.1

Block Diagram

Figure 1

Block Diagram

2.2

Terms

Following figure shows the terms used in this data sheet.

Figure 2

Terms

ST

SR

INH

IN

GND

OUT

VS

Gate Driver

HS

Slewrate

Adjustment

Digital Logic

Overvolt.

detection

Overtemp.

detection

Overcurr.

Detection

LS

Undervolt.

detection

Gate Driver

LS

LS off

HS off

Overcurr.

Detection

HS

I

IN

V

IN

OUT

I

IN H

V

IN H

V

SR

I

SR

V

ST

I

ST

V

I

V

OU T

V

DS(H S)

GND

I

I

IN

INH

SR

ST

VS

V

SD (LS)