Datasheet.kr   

CS403 데이터시트 PDF




Cherry Semiconductor Corporation에서 제조한 전자 부품 CS403은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 CS403 자료 제공

부품번호 CS403 기능
기능 5V/ 750mA Linear Regulator with RESET
제조업체 Cherry Semiconductor Corporation
로고 Cherry Semiconductor Corporation 로고


CS403 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




전체 6 페이지수

미리보기를 사용할 수 없습니다

CS403 데이터시트, 핀배열, 회로
CS3972
1.25A High Efficiency Switching Regulator
Description
The CS3972 is a 1.25A, 60V, current
mode, high efficiency, switching
regulator circuit. It can be config-
ured in buck, boost, forward, iso-
lated and non-isolated topologies,
using a single-ended switch.
The IC contains a 1.25A high effi-
ciency output switch, precision
bandgap reference, voltage regula-
tor, error amplifier, oscillator, con-
trol, and protection circuitry.
Output transistor efficiency is
achieved by keeping the switch in
quasi-saturation when it is on. This
minimizes the switch turn-off
delay time and power dissipation,
an important consideration for
applications with wide ranging
loads.
The precision reference is internally
trimmed to 1.24V, while the oscilla-
tor frequency is internally trimmed
to 40kHz. The on board 2.3V regu-
lator powers the internal circuitry.
By keeping the voltage regulator at
2.3V, the IC is able to operate down
to 3V and maintain a constant input
supply current of 6mA(typ).
Synchronization mode is achieved
by applying a pulsating VC voltage
of less than 0.2V with a duration of
about 0.5µs to VC pin. The switch-
ing frequency can be adjusted from
50kHz to 70kHz. The IC's synchro-
nization mode is set externally.
Protection circuitry includes a vari-
able current limit with external
voltage clamp, under-voltage and
over-temperature protection.
Block Diagram
VIN
2.3V
Reg
40kHz
OSC
Logic
Output
Protection
Driver
VSW
1.25A,
75V
Switch
Features
s S75wViMtcAhX, 2APEAK Internal
s 3V to 60V Input Voltage
Range
s 6mA Input Supply
Current
s 1.24V Precision Reference
s 40kHz Switching
Frequency
s Variable Current Limit
with External Voltage
Clamp
s Under-Voltage Protection
s Over-Temperature
Protection
s External Synchronization
Package Options
16L SO Wide
NC 1
VC
VFB
NC
NC
NC
NC
NC
Gnd
NC
E2
VSW
NC
E1
NC
VIN
COMP
+-
VC
VFB -
Error
Amp
+
1.24V
Ref
+
Current
Amp
-
0.22
0.22
*Always connect E1 to Ground Pin on DIP package. Both emitters are tied to ground on TO-220 Package.
Rev. 6/23/99
1
8L PDIP
5L TO-220
Tab (Gnd)
E2*
E1*
Gnd
Gnd 1
VC
VFB
NC
E2
VSW
E1
VIN
1
1 VC
2 VFB
3 Gnd
4 VSW
5 VIN
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Web Site: www.cherry-semi.com
A Company
®




CS403 pdf, 반도체, 판매, 대치품
Circuit Description
The CS3972 has an on board, high current NPN transistor
in its output stage. The output transistor is switched on
every 25µs by the on board 40 kHz oscillator. The output
is switched off as soon as the output current reaches a
dynamically controlled level. That level is determined by
three factors: the current drawn by the load, the input
voltage, and the output voltage. This control scheme has
several benefits. The IC reacts quickly to overvoltage and
short circuit conditions and it is less sensitive to input
voltage fluctuation.
Current drawn by the load influences when the output
stage turns off. The voltage across the internal high preci-
sion resistor (0.11) in the emitter of the output transistor
generating the input to the current sensing amplifier. The
output of the current sensing amplifier provides one of the
inputs to the comparator.
The other input to the comparator connected to the out-
put of the error amplifier whose inverting input is con-
nected to the output voltage through the feedback circuit-
ry while its noninverting input is set to an internal refer-
ence voltage of 1.24V. When the current sensing amplifier
output exceeds the error amplifier output, the comparator
switches off, triggering the logic which turns off the out-
put stage.
All on board amplifier, logic and protection circuitry uses
the internal 2.3V reference to minimize quiescent current
drain (6mA) and permits IC operation down to 3V.
The anti-saturation circuitry minimizes output switch
turn off time and power dissipation, by keeping the
power NPN at the edge of saturation.
VIN L1
Application Diagrams
D1
VOUT
VIN
Q1
L1 VOUT
R2 R1
R3
VSW
VIN
CS3972
VFB
+
C1
VC
R1
Gnd
C2
(1.24V)
+
C3
R3
+
C1
VSW
VIN
CS3972
VFB
VC Gnd
R2
C2
D1
(1.24V)
+
C3
R4
Figure 1: Boost Regulator
Figure 2: Buck Regulator with the External Switch
VIN TR1
C4
R1
C1
VSW
VIN
VFB
CS3972
+
C2
VC
R2
Gnd
C3
VOUT1
+
C5
VOUT2
+
C6
R4
(1.24V)
R5
+VIN
D1
TR1
L1
D2
VOUT
+
C3
D3
+
C2
–VIN
VSW
VIN
CS3972
R1
VC Gnd
VFB
R2
C3
1/2
OC1
D1 R3
1/2 R4
OC1
R5
C5
R6
C4
U1
R7
Figure 3: Flyback Multiple Output Regulator
Figure 4: Isolated Forward Regulator
4

4페이지












구       성 총 6 페이지수
다운로드[ CS403.PDF 데이터시트 ]

당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는

포괄적인 데이터시트를 제공합니다.


구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한
광범위한 전력 반도체를 판매합니다.

전력 반도체 전문업체

상호 : 아이지 인터내셔날

사이트 방문 :     [ 홈페이지 ]     [ 블로그 1 ]     [ 블로그 2 ]



관련 데이터시트

부품번호상세설명 및 기능제조사
CS400

High Voltage Bridge Rectifiers

High Voltage Power Solutions
High Voltage Power Solutions
CS403

5V/ 750mA Linear Regulator with RESET

Cherry Semiconductor Corporation
Cherry Semiconductor Corporation

DataSheet.kr       |      2020   |     연락처      |     링크모음      |      검색     |      사이트맵