UPC1935 Datasheet | NEC

DATA SHEET Bi CMOS INTEGRATED CIRCUIT µ PC1935 DC-DC CONVERTER CONTROL IC DESCRIPTION The µ PC1935 is a low-voltage input DC-DC converter control IC that can configure a three-output (step-up × 2, inverted output × 1) DC-DC converter at an input voltage of 3, 3.3, or 5 V. Because of its wide operating voltage range, this IC can also be used to control DC-DC converters using an AC adapter for input. Features - Low supply voltage: 2.5 V (MIN.) - Operating voltage range: 2.5 to 20 V (breakdown voltage: 30 V) - Can control three output channels. - Timer latch circuit for short-circuit protection. - Ceramic capacitor with low capacitance (0.1 µ F) can be used for short-circuit protection. - Dead times of channels 2 (step-up) and 3 (inverted output) can be set from external resistors. Dead time of channel 1 (step-up) is internally fixed to 85 %. - Soft start of each channel can be set independently. - Each channel can be turned ON/OFF independently. ORDERING INFORMATION Part Number Package 16-pin plastic TSSOP (5.72 mm (225)) µ PC1935GR 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. G13418EJ3V0DS00 (3rd edition) Date Published March 2000 NS CP (K) Printed in Japan The mark 5 shows major revised points. 1998 µ PC1935 BLOCK DIAGRAM Channel 3: for inversion DTC3 16 Il3 15 FB3 14 OUT3 13 DTC2 12 Il2 11 Channel 2: for step-up FB2 10 OUT2 9 - + - - + - + + + - Internal fixed voltage Internal fixed...