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UPC1934 Dataheets PDF



Part Number UPC1934
Manufacturers NEC
Logo NEC
Description DC-DC CONVERTER CONTROL IC
Datasheet UPC1934 DatasheetUPC1934 Datasheet (PDF)

DATA SHEET BiCMOS INTEGRATED CIRCUIT µ PC1934 DC-DC CONVERTER CONTROL IC DESCRIPTION The µ PC1934 is an IC that controls a low-voltage input DC-DC converter. This IC is suitable for an operation with 3-V, 3.3-V input or a lithium ion secondary battery input, because the minimum operation supply voltage is 2.5 V. Because of its wide operating voltage range, it can also be used to control DC-DC converters that use an AC adapter for input. FEATURES • Low supply voltage: 2.5 V (MIN.) • Operatin.

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DATA SHEET BiCMOS INTEGRATED CIRCUIT µ PC1934 DC-DC CONVERTER CONTROL IC DESCRIPTION The µ PC1934 is an IC that controls a low-voltage input DC-DC converter. This IC is suitable for an operation with 3-V, 3.3-V input or a lithium ion secondary battery input, because the minimum operation supply voltage is 2.5 V. Because of its wide operating voltage range, it can also be used to control DC-DC converters that use 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) • Timer latch circuit for short-circuit protection. • Ceramic capacitor with low capacitance (0.1 µ F) can be used for short-circuit protection. • Open drain outputs (Each of the outputs can be used to control a step-down converter, a step-up converter and an inverted converter.) • Can control two output channels. ORDERING INFORMATION Part Number Package 16-pin plastic SSOP (5.72 mm (225)) 16-pin plastic TSSOP (5.72 mm (225)) µ PC1934GR-1JG µ PC1934GR-PJG 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. G13567EJ3V0DS00 (3rd edition) Date Published April 2000 NS CP (K) Printed in Japan The mark 5 shows major revised points. 1998 µ PC1934 BLOCK DIAGRAM Channel 2 VREF 16 DLY 15 IN2 14 II2 13 FB2 12 DTC2 11 MOS output Reference voltage section Timer latch for short-circuit protection section MOS input – + E/A2 – – + PWM2 OUT2 10 VCC 9 MOS output + Oscillation section – E/A1 + – – PWM1 MOS input 1 CT 2 RT 3 IN1 4 II1 5 FB1 6 DTC1 7 OUT1 8 GND Channel 1 2 Data Sheet G13567EJ3V0DS00 µ PC1934 PIN CONFIGURATION (Top View) 16-pin plastic SSOP (5.72 mm (225)) • µ PC1934GR-1JG 16-pin plastic TSSOP (5.72 mm (225)) • µ PC1934GR-PJG CT RT IN1 II1 FB1 DTC1 OUT1 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VREF DLY IN2 II2 FB2 DTC2 OUT2 VCC PIN FUNCTIONS Pin No. 1 2 3 Symbol CT RT IN1 Function Frequency setting capacitor connection Frequency setting resistor connection Channel 1 error amplifier non-inverted input 4 5 6 II1 FB1 DTC1 Channel 1 error amplifier inverted input Channel 1 error amplifier output Channel 1 dead time setting 12 13 14 FB2 II2 IN2 Channel 2 error amplifier output Channel 2 error amplifier inverted input Channel 2 error amplifier non-inverted input 7 OUT1 Channel 1 open drain output 15 DLY Delay capacitor connection of shortcircuit protection 8 GND Ground 16 VREF Reference voltage output Pin No. 9 10 11 Symbol VCC OUT2 DTC2 Power supply Channel 2 open drain output Channel 2 dead time setting Function Data Sheet G13567EJ3V0DS00 3 µ PC1934 CONTENTS 1. ELECTRICAL SPECIFICATIONS ................................................................................................................ 5 2. CONFIGURATION AND OPERATION OF EACH B.


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