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CS3845GDWR16 PDF预览

CS3845GDWR16

更新时间: 2024-01-14 20:27:20
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 159K
描述
Current Mode PWM Control Circuit with 50% Max Duty Cycle

CS3845GDWR16 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:SOIC包装说明:SO-16
针数:16Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.65Is Samacsys:N
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:CURRENT-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:25 V
最小输入电压:8.2 V标称输入电压:15 V
JESD-30 代码:R-PDSO-G16JESD-609代码:e0
长度:10.3 mm功能数量:1
端子数量:16最高工作温度:70 °C
最低工作温度:最大输出电流:1 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峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified座面最大高度:2.65 mm
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:SINGLE技术:BIPOLAR
温度等级:COMMERCIAL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:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:7.5 mmBase Number Matches:1

CS3845GDWR16 数据手册

 浏览型号CS3845GDWR16的Datasheet PDF文件第2页浏览型号CS3845GDWR16的Datasheet PDF文件第3页浏览型号CS3845GDWR16的Datasheet PDF文件第4页浏览型号CS3845GDWR16的Datasheet PDF文件第5页浏览型号CS3845GDWR16的Datasheet PDF文件第6页 
CS2844/CS3844  
CS2845/CS3845  
Current Mode PWM  
Control Circuit  
with 50% Max Duty Cycle  
Description  
Features  
The CS3844/45 provides all the neces-  
before the output stage is enabled. In  
the CS2844/CS3844 turn on occurs at  
16V and turn off at 10V. In the  
CS2845/CS3845 turn on is at 8.4V and  
turn off at 7.6V.  
Optimized for Offline  
sary features to implement off-line  
fixed frequency current-mode control  
with a minimum number of external  
components.  
Control  
Temp. Compensated  
Oscillator  
50% Max Duty-cycle Clamp  
The CS3844 family incorporates a new  
precision temperature-controlled oscil-  
lator to minimize variations in fre-  
quency. An internal toggle flip-flop,  
which blanks the output every other  
clock cycle, limits the duty-cycle range  
to less than 50%. An undervoltage  
lockout ensures that VREF is stabilized  
Other features include low start-up  
current, pulse-by-pulse current limit-  
ing, and a high-current totem pole out-  
put for driving capacitive loads, such  
as gate of a power MOSFET. The out-  
put is low in the off state, consistent  
with N-channel devices.  
V  
Stabilized before  
REF  
Output Stage is Enabled  
Low Start-up Current  
Pulse-by-pulse Current  
Limiting  
Improved Undervoltage  
Lockout  
Absolute Maximum Ratings  
Double Pulse Suppression  
1% Trimmed Bandgap Ref.  
Supply Voltage (ICC<30mA).........................................................................Self Limiting  
Supply Voltage (Low Impedance Source) .................................................................30V  
Output Current..............................................................................................................±1A  
Output Energy (Capacitive Load)................................................................................5µJ  
Analog Inputs (VFB, VSENSE) .........................................................................-0.3V to 5.5V  
Error Amp Output Sink Current.............................................................................10mA  
Lead Temperature Soldering  
High Current Totem Pole  
Output  
Package Options  
8 Lead PDIP & SO Narrow  
1
2
3
4
8
7
6
5
COMP  
VFB  
VREF  
VCC  
Wave Solder (through hole styles only) ...................10 sec. max, 260°C peak  
Reflow (SMD styles only) ....................60 sec. max above 183°C, 230°C peak  
Sense  
OSC  
VOUT  
Gnd  
Block Diagram  
14 Lead SO Narrow  
1
2
3
4
5
6
7
14  
13  
12  
COMP  
VREF  
VCC Undervoltage Lock-out  
VCC  
VCC Pwr  
NC  
NC  
VFB  
VCC  
34V  
Set/  
5.0 Volt  
VREF  
11 VCC Pwr  
NC  
Reset Reference  
Gnd  
VFB  
10  
Sense  
NC  
VOUT  
16V/10V  
(8.4V/7.6V)  
Internal  
Bias  
9
Gnd  
8
OSC  
Pwr Gnd  
Error  
Amplifier  
VREF  
R
R
Undervoltage  
Lockout  
-
16 Lead SO Wide  
COMP  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
NC  
NC  
+
2.50V  
NC  
VREF  
VCC  
VCCPwr  
VO  
Toggle  
Flip-Flop  
NOR  
VOUT  
OSC  
Oscillator  
COMP  
VFB  
S
R
SENSE  
OSC  
NC  
2 R  
Pwr Gnd  
Gnd  
R
1V  
Pwr Gnd  
NC  
PWM  
Latch  
Current  
Sensing  
Comparator  
NC  
(
) indicates CS-2845/3845  
Sense  
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. 3/17/99  
A
®
Company  
1

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