U6083B

TELEFUNKEN Semiconductors

Rev. A1, 14-Feb-97

1 (8)

PWM Power Control with Interference Suppression

Description

The U6083B is a PWM IC in bipolar technology for the

control of an N-channel power MOSFET used as a high

side switch. The IC is ideal for use in the brightness con-

trol (dimming) of lamps e.g., in dashboard applications.

Features

D Pulse-width modulation up to 2 kHz clock frequency

D Protection against short circuit, load dump

D Duty cycle 18 to 100% continuously

D Internally reduced pulse slope of lamp’s voltage

D Interference and damage protection according to

VDE 0839 and ISO/TR 7637/1.

D Charge pump noise suppressed

D Ground wire breakage protection

Ordering Information

Extended Type Number

Package

Remarks

U6083B

DIP8

Block Diagram

Current monitoring

+ short circuit detection

Output

Charge

pump

RC oscillator

Duty cycle

range

18 ... 100%

Duty cycle

reduction

Control input

Voltage

monitoring

Slew rate

control

5

1

4

3

PWM

Logic

6

7

8

47 k

W

47 nF

2

95 9753

150

W

GND

Ground

Figure 1. Block diagram with external circuit