器件名称: U2352B
功能描述: PWM Power Control for DC Loads
文件大小: 110.28KB 共8页
简 介:U2352B
PWM Power Control for DC Loads
Description
The U2352B bipolar circuit is a PWM device for controlling 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)
Applications
D D D D D D
Battery-operated screwdrivers Battery-operated machine tools Halogen lamp controllers Dimmers Electronic fuses High-performance clock generators
D 100 mA push-pull output stage D Voltage monitoring D Temperature-compensated supply voltage limitation D Chip temperature monitoring
Package: DIP8, SO8
VS 2xI Chip temperature monitoring 140°C Reference voltage 8 VS
S1 1
Oscillator
Voltage limitation 6.8 V
I
– 2 K1 +
Output stage logic Push-pull output stage
7
Time window current measurement 3 – K2 + Load current monitoring 4 S2
Q S
Q R
6 GND
POR 5
95 9670
Figure 1. Block diagram
TELEFUNKEN Semiconductors Rev. A1, 29-May-96
1 (8)
U2352B
2 (8)
VB R1 VS 2xI Reference voltage D1 M Load S1 Oscillator Voltage limitation 6.8 V VS D2 D3 2 – K1 + Output stage logic Push-pull output stage 6 GND – K2 + Load current monitoring POR 5 *) R D 7 RG C2 3 Time window current measurement Q R……
