U2352B Datasheet, PDF (1/8 Pages) TEMIC Semiconductors – PWM Power Control for DC Loads

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, R_DS(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,
R_DS(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
V_S
2xI
S₁
1
I
Reference
Chip
voltage
Oscillator
temperature
monitoring
140°C
Voltage
8
limitation 6.8 V
V_S
2
–
K1
+
Output stage
logic
Time window
current measurement
QQ
SR
3
–
K2
+
Load current
POR
monitoring
4
S₂
7
Push-pull
output stage
6
GND
5
TELEFUNKEN Semiconductors
Rev. A1, 29-May-96
Figure 1. Block diagram
95 9670
1 (8)