VB408FI

® VB408 / VB408B / VB408FI HIGH VOLTAGE LINEAR REGULATOR POWER I.C. PRELIMINARY DATA TYPE VB408 VB408FI VB408B ∆VIN,OUT 400 V ILIM 40 mA V OUT 1.25 to VIN-30 V 2 3 3 INPUT VOLTAGE UP TO 400 V DC OR 285 V RMS RECTIFIED s OUTPUT VOLTAGE ADJUSTABLE FROM 1.25 TO VIN-30V s OUTPUT CURRENT LIMITED TO 40 mA s THERMAL SHUT-DOWN PROTECTION s SHORT CIRCUIT PROTECTION s 1 TO-220 ISOWATT220 1 2 3 1 DESCRIPTION The VB408, VB408B, VB408FI are fully protected positive adjustable voltage regulators made using a proprietary High Voltage VIPower™ technology. The device can be connected to a D.C. source (up to 400V) or in off-line application directly to the rectified main (110V/ 230V). It is particularly suitable to be used in the manufacture of DC/DC converters, AC/DC converters, D2PAK ORDER CODES : VB408 TO-220 ISOWATT220 VB408FI D2PAK VB408B start-up circuits, pneumatic valve drivers and current sources. The device is able to drive resistive or inductive loads with an output voltage from 1.25V to VIN-30V providing an internally limited output current; it has built in short circuit and thermal shutdown protections. The device does not provide galvanic insulation from main. BLOCK DIAGRAM V IN Power Stage BIAS CIRCUIT CURRENT SENSE V OUT Current Limitation + _ Thermal RE F 3 REF 2 + _ Protection C ontrol Signal + _ RE F 1 AD J FC00410 September 1999 1/8 1 VB408 / VB408B / VB408FI ABSOLUTE MAXIMUM RATING Symbol Parameter Input to Output Voltage at 20 mA Output cur...