UPC1934 datasheet, PDF - EEWORLD Datasheet

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UPC1934: Description0.021 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16; CategoryPower/power management; File Size122KB，20 Pages; ManufacturerNEC ( Renesas ); Websitehttps://www2.renesas.cn/zh-cn/

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0.021 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16

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DATA SHEET

BiCMOS INTEGRATED CIRCUIT

PC1934

DC-DC CONVERTER CONTROL IC

DESCRIPTION

The

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

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))

PC1934GR-1JG

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

shows major revised points.

1998

PC1934

CONTENTS

1. ELECTRICAL SPECIFICATIONS ................................................................................................................ 5

2. CONFIGURATION AND OPERATION OF EACH BLOCK.................................................................... 10

2.1 Reference Voltage Generator ...........................................................................................................................10

2.2 Oscillator ...........................................................................................................................................................10

2.3 Under Voltage Lock-out Circuit ........................................................................................................................11

2.4 Error Amplifiers.................................................................................................................................................11

2.5 PWM Comparators............................................................................................................................................11

2.6 Timer Latch-Method Short Circuit Protection Circuit ....................................................................................11

2.7 Output Circuit....................................................................................................................................................11

3. NOTES ON USE........................................................................................................................................ 12

3.1 Setting the Output Voltage ...............................................................................................................................12

3.2 Setting the Oscillation Frequency ...................................................................................................................13

3.3 Preventing Malfunction of the Timer Latch-Method Short Circuit Protection Circuit..................................13

3.4 Connecting Unused Error Amplifiers ..............................................................................................................13

3.5 ON/OFF Control.................................................................................................................................................14

3.6 Notes on Actual Pattern Wiring........................................................................................................................14

4. APPLICATION EXAMPLE ......................................................................................................................... 15

4.1 Application Example.........................................................................................................................................15

4.2 List of External Parts ........................................................................................................................................15

5. PACKAGE DRAWINGS.............................................................................................................................. 16

6. RECOMMENDED SOLDERING CONDITIONS ....................................................................................... 18

Data Sheet G13567EJ3V0DS00

UPC1934 Related Products

	UPC1934	UPC1934GR-1JG	UPC1934GR-PJG
Description	0.021 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16	0.021 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16	0.021 A DUAL SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16

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