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STK740-470 데이터시트 PDF




Sanyo Semicon Device에서 제조한 전자 부품 STK740-470은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 STK740-470 기능
기능 5V/5A Single Output Separate Excitation Chopper Regulator
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STK740-470 데이터시트, 핀배열, 회로
Ordering number:EN*6107
Thick Film Hybrid IC
STK740-470
5V/5A Single Output Separate Excitation
Chopper Regulator
Preliminary
Overview
The STK740-470 is a separate-excitation step-down
chopper regulator hybrid IC for the secondstage circuit.
This IC incorporates in the package all the necessary
circuits for a chopper regulator including power switch,
error amplifier, soft start, shutdown type output short
protection, low-voltage malfunction prevention, on/off,
and snubber circuits. Therefore, external components
required are input and output capacitors and a choke coil
only and this allows this IC to be used to construct a
large-current (5A) chopper regulator as if a 3-pin regula-
tor were used. DC8V to 18V input voltage can be
handled and up to 5A of output current is supported.
Applications
• Local power supply for the equipment of which input
rating is DC9V to 15V.
Package Dimensions
unit:mm
4170-SIP28
[STK740-470]
46.6
41.2
3.6
(6.63)
1
2.54
12
0.5
11×2.54=27.94
Features
• Adoption of Sanyo IMST ; Insulated Metal Substrate
Technology, allows the circuit to be operated without
using a heat sink (see “No Fin Output Current Derat-
ing” chart in the page 6).
• Typical efficiency of 90% at DC 12V input, 2.5A
output.
• Fine adjustment of output voltage enable.
• 50 kHz operating frequency.
• Low-RON resistance power MOSFET adopted.
• Low-VF Schottky barrier diode adopted.
8.5
0.4
2.9
SANYO : SIP-28
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
63099RM (KT) No.6107–1/10




STK740-470 pdf, 반도체, 판매, 대치품
Test Circuit
STK740-470
12 11 10 9 8 7 6 5 4 3 2 1
DC
INPUT
C1
L1
FB C2
ON/OFF
Vo adjust
OUTPUT
(5V)
GND
C1 : 47µF/25V (OS capacitor)
C2 : 1000µF/16V×2
L1 : 30µH
FB : Ferrite-bead core
GND
Overvoltage Protection Circuit
In a constant-voltage power supply circuit output voltage may generally exceed the stipulated rating (equivalent to input
voltage) when the circuit is broken down or the IC and the printed circuit board is wrongly soldered. Therefore overvoltage
protection circuit is recommended to use to minimize the damages caused by the overvoltage.
Sample the overvoltage protection circuit
DC
INPUT
FUSE
Regulator
OUTPUT
SCR
GND
CR
GND
No.6107–4/10

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STK740-470 전자부품, 판매, 대치품
70
60
50
40
30
20
10
0
0
4.0
3.0
2.0
STK740-470
No Fin Tc vs.Output Current
VIN=15V
VIN=12V
VIN=9V
123 4 5
Output Current Io[A]
Power Dissipation vs Output Current
6
VIN=15V
VIN=12V
VIN=9V
1.0
0.0
01 2 3 4 5 6
Output Current Io[A]
No.6107–7/10

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관련 데이터시트

부품번호상세설명 및 기능제조사
STK740-470

5V/5A Single Output Separate Excitation Chopper Regulator

Sanyo Semicon Device
Sanyo Semicon Device

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