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UC2845ADM PDF预览

UC2845ADM

更新时间: 2024-11-04 04:48:15
品牌 Logo 应用领域
美高森美 - MICROSEMI 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
8页 229K
描述
CURRENT MODE PWM CONTROLLER

UC2845ADM 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active包装说明:ROHS COMPLIANT, PLASTIC, SOIC-8
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:2.23
Is 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:30 V最小输入电压:8.2 V
标称输入电压:15 VJESD-30 代码:R-PDSO-G8
JESD-609代码:e3长度:4.915 mm
湿度敏感等级:1功能数量:1
端子数量:8最高工作温度:85 °C
最低工作温度:-40 °C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:SOP8,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:1.75 mm
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:SINGLE最大切换频率:500 kHz
技术:BIPOLAR温度等级:INDUSTRIAL
端子面层:Matte Tin (Sn)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:40宽度:3.875 mm
Base Number Matches:1

UC2845ADM 数据手册

 浏览型号UC2845ADM的Datasheet PDF文件第2页浏览型号UC2845ADM的Datasheet PDF文件第3页浏览型号UC2845ADM的Datasheet PDF文件第4页浏览型号UC2845ADM的Datasheet PDF文件第5页浏览型号UC2845ADM的Datasheet PDF文件第6页浏览型号UC2845ADM的Datasheet PDF文件第7页 
LIN DOC #: 1840  
UC184xA/284xA/384xA  
C U R R E N T M O D E P W M C O N T R O L L E R  
P R O D U C T I O N D A T A S H E E T  
T H E I N F I N I T E P O W E R O F I N N O V A T I O N  
DESCRIPTION  
KEY FEATURES  
LOW START-UP CURRENT. (0.5mA max.)  
TRIMMED OSCILLATOR DISCHARGE  
The UC184xA family of control ICs  
provides all the necessary features to  
implement off-line fixed-frequency,  
current-mode switching power supplies  
with a minimum of external compo-  
nents. The current mode architecture  
demonstrates improved load regulation,  
pulse-by-pulse current limiting and  
inherent protection of the power supply  
output switch. The IC includes: A  
bandgap reference trimmed to ±1%  
accuracy, an error amplifier, a current  
sense comparator with internal clamp to  
1V, a high current totem pole output  
stage for fast switching of power  
MOSFET's, and an externally program-  
mable oscillator to set frequency and  
CURRENT. (See Product Highlight)  
maximum duty cycle. The under-  
voltage lock-out is designed to operate  
with 250µA typ. start-up current,  
allowing an efficient bootstrap supply  
voltage design. Available options for  
this family of products, such as start-up  
voltage hysteresis and duty cycle, are  
summarized below in the Available  
Options section. The UC184xA family  
of control ICs is also available in 14-pin  
SOIC package which makes the Power  
Output Stage Collector and Ground pins  
available.  
p OPTIMIZED FOR OFF-LINE AND DC-TO-DC  
CONVERTERS.  
p AUTOMATIC FEED FORWARD  
COMPENSATION.  
p PULSE-BY-PULSE CURRENT LIMITING.  
p ENHANCED LOAD RESPONSE  
CHARACTERISTICS.  
p UNDER-VOLTAGE LOCKOUT WITH  
HYSTERESIS.  
p DOUBLE PULSE SUPPRESSION.  
p HIGH-CURRENT TOTEM POLE OUTPUT.  
p INTERNALLY TRIMMED BANDGAP  
REFERENCE.  
p 500KHz OPERATION.  
PRODUCT HIGHLIGHT  
p LOW RO ERROR AMPLIFIER.  
COMPARISON OF UC384XA VS. SG384X DISCHARGE CURRENT  
APPLICATIONS  
UC384xA  
ECONOMICAL OFF-LINE FLYBACK OR  
SG384x  
SG384x  
Min. Limit  
Max. Limit  
FORWARD CONVERTERS.  
TA=25°C  
DC-DC BUCK OR BOOST CONVERTERS.  
LOW COST DC MOTOR CONTROL.  
A V A  
I
L
A
B
L
E
O P  
T I O N S  
Part #  
Start-Up Hysteresis Max. Duty  
Voltage  
16V  
Cycle  
<100%  
<100%  
<50%  
<50%  
UCx842A  
6V  
0.8V  
6V  
UCx843A 8.4V  
UCx844A 16V  
UCx845A 8.4V  
7.5  
7.8  
−3σ  
8.3  
Mean  
8.8  
+3σ  
9.3  
0.8V  
Discharge Current Distribution - mA  
PACKAGE ORDER INFORMATION  
Plastic DIP  
8-pin  
Plastic SOIC  
8-pin  
Plastic SOIC  
14-pin  
Ceramic DIP  
8-pin  
TA (°C)  
M
DM  
D
Y
0 to 70  
-40 to 85  
-55 to 125  
UC384xAM  
UC284xAM  
UC384xADM  
UC284xADM  
UC384xAD  
UC284xAD  
UC284xAY  
UC184xAY  
Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. UC3842ADMT)  
F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1  
Copyright © 1995  
Rev. 1.2 12/95  
1
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841  

UC2845ADM 替代型号

型号 品牌 替代类型 描述 数据表
UC2843ADM MICROSEMI

完全替代

CURRENT MODE PWM CONTROLLER
UC3845ADM MICROSEMI

完全替代

CURRENT MODE PWM CONTROLLER
UC3843ADM MICROSEMI

完全替代

CURRENT MODE PWM CONTROLLER

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