UPC1909

DATA SHEET Bipolar Analog Integrated Circuit µPC1909 SWITCHING REGULATOR CONTROL IC The µPC1909 is a switching regulator control IC ideal for primary side control of active-clamp type Note DC/DC converters. This IC has 2 outputs employing a totem-pole circuit with peak output current 1.2 A, and is capable of directly driving a power MOS-FET. As a result, it has been possible to realize primary side control of an active-clamp type converter on a single chip. Note It is necessary to obtain license from Vicor Corporation before using the µPC1909 in an active-clamp type circuit. FEATURES 2 on-chip outputs; for Q and Q Capable of directly driving a power MOS-FET Drive supply voltage range: 7 V to 24 V On-chip remote control circuit On-chip pulse-by-pulse overcurrent protection circuit On-chip overvoltage latch circuit ORDERING INFORMATION Part Number Package 16-pin plastic DIP (300 mils) 16-pin plastic SOP (300 mils) µPC1909CX µPC1909GS The information in this document is subject to change without notice. Before using this document, please confirm that this is the latest version. Not all devices/types available in every country. Please check with local NEC representative for availability and additional information. Document No. G14309EJ1V0DS00 (1st edition) Date Published July 1999 N CP(K) Printed in Japan © 1999 µPC1909 BLOCK DIAGRAM CT 16 RT 15 VREF 14 DTC1 13 FB 12 PWM comparator 1 – + + OUT1 11 EMI1 10 VCC 9 Oscillator Reference power supply OLS ...