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CS3972YDW16 PDF预览

CS3972YDW16

更新时间: 2024-01-14 11:29:50
品牌 Logo 应用领域
樱桃 - CHERRY 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
6页 188K
描述
1.25A High Efficiency Switching Regulator

CS3972YDW16 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:SO-16Reach Compliance Code:unknown
风险等级:5.8Is Samacsys:N
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:CURRENT-MODE
最大输入电压:60 V最小输入电压:3 V
JESD-30 代码:R-PDSO-G16JESD-609代码:e0
功能数量:1端子数量:16
最高工作温度:125 °C最低工作温度:-40 °C
最大输出电流:3 A封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP16,.4
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
认证状态:Not Qualified子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:BUCK-BOOST
最大切换频率:47 kHz技术:BIPOLAR
温度等级:AUTOMOTIVE端子面层:Tin/Lead (Sn/Pb)
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUALBase Number Matches:1

CS3972YDW16 数据手册

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CS3972  
1.25A High Efficiency Switching Regulator  
Features  
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 precision reference is internally  
75VMAX, 2APEAK Internal  
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.  
Switch  
3V to 60V Input Voltage  
Range  
6mA Input Supply  
Current  
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.  
1.24V Precision Reference  
40kHz Switching  
Frequency  
Variable Current Limit  
with External Voltage  
Clamp  
Under-Voltage Protection  
Over-Temperature  
Protection circuitry includes a vari-  
able current limit with external  
voltage clamp, under-voltage and  
over-temperature protection.  
Protection  
External Synchronization  
Package Options  
Block Diagram  
16L SO Wide  
1
NC  
Gnd  
NC  
V
C
V
E
2
FB  
V
SW  
V
NC  
NC  
NC  
NC  
NC  
SW  
Output  
Protection  
2.3V  
Reg  
V
IN  
NC  
E
1
NC  
1.25A,  
75V  
Switch  
40kHz  
OSC  
Logic  
Driver  
V
IN  
8L PDIP  
5L TO-220  
COMP  
+
Tab (Gnd)  
-
V
C
1
Gnd  
E
2
V
C
VSW  
-
V
FB  
Error  
Amp  
+
V
E
V
FB  
1
0.22  
1 VC  
Current  
Amp  
-
0.22Ω  
NC  
IN  
+
E *  
2
2 VFB  
E *  
1
1.24V  
Ref  
3 Gnd  
4 VSW  
Gnd  
5 VIN  
*Always connect E1 to Ground Pin on DIP package. Both emitters are tied to ground on TO-220 Package.  
1
Cherry Semiconductor Corporation  
2000 South County Trail, East Greenwich, RI 02818  
Tel: (401)885-3600 Fax: (401)885-5786  
Email: info@cherry-semi.com  
Web Site: www.cherry-semi.com  
Rev. 6/23/99  
A
Company  
®
1

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