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U2352 Datasheet

PWM Power Control for DC Loads

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PWM Power Control for DC Loads
U2352B
Description
The U2352B bipolar circuit is a PWM device for control-
ling logic level Power MOSFETs and IGBTs. It allows
simple power control for dc loads. Integrated load current
monitoring with adjustable switch-off threshold also
gives the option of measuring the load current via the
MOS transistor’s on-state resistance, RDS(on), or via a
shunt resistor.
Special Features
D Pulse width control up to 50 kHz clock frequency
D Load current monitoring via the on-state resistance,
RDS(on), of the FET or via shunt resistor (optional)
D 100 mA push-pull output stage
D Voltage monitoring
D Temperature-compensated supply voltage limitation
D Chip temperature monitoring
Applications
D Battery-operated screwdrivers
D Battery-operated machine tools
D Halogen lamp controllers
D Dimmers
D Electronic fuses
D High-performance clock generators
Package: DIP8, SO8
VS
2xI
S1
1
I
Oscillator
Chip
temperature
monitoring
140°C
Reference
voltage
Voltage
limitation 6.8 V
8
VS
2
K1
+
Output stage
logic
Time window
current measurement
QQ
SR
3–
K2
+
Load current
monitoring
4
POR
S2
7
Push-pull
output stage
6
GND
5
TELEFUNKEN Semiconductors
Rev. A1, 29-May-96
Figure 1. Block diagram
95 9670
1 (8)
TEMIC Semiconductors
TEMIC Semiconductors



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