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PDF U6081B Data sheet ( Hoja de datos )
| Número de pieza | U6081B | |
| Descripción | PWM Power Control with Low Duty Cycle Switch Off | |
| Fabricantes | TEMIC Semiconductors | |
| Logotipo |  |
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U6081B
PWM Power Control with Low Duty Cycle Switch Off
Description
U6081B 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 the use in the brightness
control (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 overvol-
tage and reverse VS
D Duty cycle 0 to 100%
D Output stage for power MOSFET
D Interference and damage protection according to
VDE 0839 and ISO/TR 7637/1.
D Ground wire breakage protection
D Charge pump noise suppressed
Ordering Information
Extended Type Number
U6081B
Package
DIP8
Remarks
Block Diagram
VS
1
RC oscillator
C1 4
47 kW
Control input
C2 3
Duty cycle
range
0/13 to 100 %
C5
5
Current monitoring
+ short circuit detection
6
PWM
Logic
Charge 7
pump
Output 8
Voltage
monitoring
2
95 9752
VBatt
Rsh
C3
47 nF
150 W R3
Ground
Figure 1. Block diagram with external circuit
TELEFUNKEN Semiconductors
Rev. A1, 14-Feb-97
1 (8)
1 page  
U6081B
Parameters
Test Conditions / Pins Symbol Min Typ Max Unit
Switch-off at small duty cycles VBatt = 12 V Pin 3
Output disabled
V3/VS 0.3 0.32 0.34
Output active
Hysteresis switch-on
V3/VS 0.32 0.34 0.36
DV3/VS 0.004
0.032
Gate output
Pin 8
Voltage
Low level
VBatt
Tamb
=
=
16.5 V,
110°C, R3
=
150
W
High level,
duty cycle 100%
V8
V8
0.35 0.70 0.95
V
1.5 *)
V7
Current
Oscillator
V8 = Low level
V8 = High level, I7 > | I8 |
I8
1.0
–1.0
mA
Frequency
Threshold cycle
Upper
Lower
Oscillator current
Frequency tolerance
Pin4 f
10
2000
Hz
+ +a aV8
High, 1
VT100
VS
1 0.68 0.7 0.72
+ +aV8
Low, 2
tVT 100
VS
a2
0.65 0.67 0.69
+a VTL
3 VS
VBatt = 12 V
a3
0.26 0.28
0.3
Iosc 34 45 54 mA
C4 open, C2 = 470 nF,
duty cycle = 50%
f 6.0 9.9 13.5 Hz
*) Reference point is battery ground
TELEFUNKEN Semiconductors
Rev. A1, 14-Feb-97
5 (8)
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet U6081B.PDF ] | |
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