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UPC1934GR-PJG 데이터시트 PDF




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부품번호 UPC1934GR-PJG 기능
기능 DC-DC CONVERTER CONTROL IC
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UPC1934GR-PJG 데이터시트, 핀배열, 회로
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
µ PC1934GR-1JG 16-pin plastic SSOP (5.72 mm (225))
µ PC1934GR-PJG 16-pin plastic TSSOP (5.72 mm (225))
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




UPC1934GR-PJG pdf, 반도체, 판매, 대치품
µ 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
4 Data Sheet G13567EJ3V0DS00

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UPC1934GR-PJG 전자부품, 판매, 대치품
Timing Charts
Channel 1 soft start
DTC1
Channel 1
OUT1
Channel 2
OUT2
CT
FB1
DTC2
CT
FB2
DLY
Normal operation
ON OFF
ON OFF
Short-load
Stop output
VTH
VUV
Remark These timings are an example when the channel 1 output has been a short- load. The outputs of channel 1 and 2 are also stopped when a short-
circuit protection circuit starts operation by detecting a short- load of channel 2.

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관련 데이터시트

부품번호상세설명 및 기능제조사
UPC1934GR-PJG

DC-DC CONVERTER CONTROL IC

NEC
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