U6084B
PWM Power Control with Automatic Duty Cycle Reduction
Description
The U6084B is a bipolar technology PWM-IC designed applications. For a constant brightness the preselected
for the control of an N-channel power MOSFET used as duty cycle can be reduced automatically as a function of
a high-side switch. The IC is ideal for use in the brightness the supply voltage.
control (dimming) of lamps such as, in dashboard
Features
Pulse width modulation up to 2 kHz clock frequency
Interference and damage protection according to
VDE 0839 and ISO/TR 7637/1.
Protection against short circuit, load-dump
overvoltage and reverse V
S
Charge pump noise suppressed
Ground wire breakage protection
Duty cycle 0 to 100 % continuously
Output stage for power MOSFET
Ordering Information
Extended Type Number
U6084B–FP
Package
SO16
Remarks
Block Diagram
V
Batt
C
5
V
S
R
sh
16
11
9
12
13
14
Short circuit
Current monitoring
latch monitoring
+ short circuit detection
5
6
Charge
pump
RC oscillator
C
47 nF
PWM
Logic
C
1
3
47 k
Control input
Output
3
C
2
Duty cycle
range
0–100%
Voltage
monitoring
Enable/
disable
Duty cycle
reduction
2
4
1
95 9751
C
6
R
3
150
Ground
Figure 1. Block diagram with external circuit
TELEFUNKEN Semiconductors
1 (8)
Rev. A1, 14-Feb-97
TEMIC [ TEMIC SEMICONDUCTORS ]
