U6083B

U6083B PWM Power Control with Interference Suppression Description The U6083B 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 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 over–voltage and reverse VS D Interference and damage protection according to VDE 0839 and ISO/TR 7637/1. D Duty cycle 18 to 100% continuously D Internally reduced pulse slope of lamp’s voltage D Charge pump noise suppressed D Ground wire breakage protection Ordering Information Extended Type Number U6083B Package DIP8 Remarks Block Diagram VS 1 5 Current monitoring + short circuit detection 6 C5 Rsh VBatt C1 47 kW C2 4 RC oscillator PWM Logic Control input Charge pump 7 C3 47 nF 8 3 Output Duty cycle range 18 ... 100% Duty cycle reduction GND 2 Voltage monitoring Slew rate control 95 9753 150 W R3 Ground Figure 1. Block diagram with external circuit TELEFUNKEN Semiconductors Rev. A1, 14-Feb-97 1 (8) U6083B Pin Description VS GND VI Osc 1 2 3 4 95 9944 8 7 6 5 Output 2 VS Sense Delay Pin 1 2 3 4 5 6 7 8 Symbol VS GND VI Osc Delay Sense 2 VS Output Function Supply voltage VS IC ground Control input (duty cycle) Oscillator Short circuit protection delay Current sensing Voltage doubler Output Functional Description Pin 1, Supply Voltage, Vs or VBatt Overvoltage ...