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UC2843BN

更新时间： 2024-11-24 04:48:19
品牌 Logo 应用领域
安森美 - ONSEMI 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
21页 370K
描述
High Performance Current Mode Controllers

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UC2843BN 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：DIP包装说明：PLASTIC, DIP-8
针数：8Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
Factory Lead Time：1 week风险等级：5.05
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：25 V最小输入电压：12 V
标称输入电压：15 VJESD-30 代码：R-PDIP-T8
JESD-609代码：e0长度：9.78 mm
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-25 °C
最大输出电流：1 A封装主体材料：PLASTIC/EPOXY
封装代码：DIP封装等效代码：DIP8,.3
封装形状：RECTANGULAR封装形式：IN-LINE
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：4.45 mm子类别：Switching Regulator or Controllers
表面贴装：NO切换器配置：SINGLE
最大切换频率：500 kHz技术：BIPOLAR
温度等级：OTHER端子面层：Tin/Lead (Sn/Pb)
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：7.62 mmBase Number Matches：1

UC2843BN 数据手册

 浏览型号UC2843BN的Datasheet PDF文件第2页浏览型号UC2843BN的Datasheet PDF文件第3页浏览型号UC2843BN的Datasheet PDF文件第4页浏览型号UC2843BN的Datasheet PDF文件第5页浏览型号UC2843BN的Datasheet PDF文件第6页浏览型号UC2843BN的Datasheet PDF文件第7页 
UC3842B, UC3843B,  
UC2842B, UC2843B,  
NCV3843BV  
High Performance Current  
Mode Controllers  
The UC3842B, UC3843B series are high performance fixed  
frequency current mode controllers. They are specifically designed for  
Off−Line and DC−DC converter applications offering the designer a  
cost−effective solution with minimal external components. These  
integrated circuits feature a trimmed oscillator for precise duty cycle  
control, a temperature compensated reference, high gain error  
amplifier, current sensing comparator, and a high current totem pole  
output ideally suited for driving a power MOSFET.  
http://onsemi.com  
PDIP−8  
N SUFFIX  
CASE 626  
8
1
Also included are protective features consisting of input and  
reference undervoltage lockouts each with hysteresis, cycle−by−cycle  
current limiting, programmable output deadtime, and a latch for single  
pulse metering.  
These devices are available in an 8−pin dual−in−line and surface  
mount (SOIC−8) plastic package as well as the 14−pin plastic surface  
mount (SOIC−14). The SOIC−14 package has separate power and  
ground pins for the totem pole output stage.  
SOIC−14  
D SUFFIX  
CASE 751A  
14  
1
SOIC−8  
D1 SUFFIX  
8
The UCX842B has UVLO thresholds of 16 V (on) and 10 V (off),  
ideally suited for off−line converters. The UCX843B is tailored for  
lower voltage applications having UVLO thresholds of 8.5 V (on) and  
7.6 V (off).  
CASE 751  
1
PIN CONNECTIONS  
Features  
• Trimmed Oscillator for Precise Frequency Control  
• Oscillator Frequency Guaranteed at 250 kHz  
• Current Mode Operation to 500 kHz  
• Automatic Feed Forward Compensation  
• Latching PWM for Cycle−By−Cycle Current Limiting  
• Internally Trimmed Reference with Undervoltage Lockout  
• High Current Totem Pole Output  
1
2
3
4
8
7
6
5
Compensation  
Voltage Feedback  
Current Sense  
V
V
ref  
CC  
Output  
GND  
R /C  
T
T
(Top View)  
Compensation  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
V
ref  
NC  
Voltage Feedback  
NC  
NC  
• Undervoltage Lockout with Hysteresis  
• Low Startup and Operating Current  
• Pb−Free Packages are Available  
V
V
CC  
C
Current Sense  
NC  
Output  
GND  
V
7(12)  
CC  
8
R /C  
T
Power Ground  
T
V
V
CC  
ref  
5.0V  
Reference  
(Top View)  
Undervoltage  
Lockout  
8(14)  
R
R
V
ref  
V
C
ORDERING INFORMATION  
See detailed ordering and shipping information in the package  
dimensions section on page 17 of this data sheet.  
Undervoltage  
Lockout  
7(11)  
R /C  
T
Output  
T
Oscillator  
6(10)  
4(7)  
Latching  
PWM  
DEVICE MARKING INFORMATION  
See general marking information in the device marking  
section on page 19 of this data sheet.  
Power  
Ground  
5(8)  
Voltage  
Feedback  
Input  
+
−
2(3)  
Output  
Compensation  
Error  
Amplifier  
Current  
Sense  
Input  
3(5)  
1(1)  
GND 5(9)  
Pin numbers in parenthesis are for the D suffix SOIC−14 package.  
Figure 1. Simplified Block Diagram  
©
Semiconductor Components Industries, LLC, 2007  
1
Publication Order Number:  
February, 2007 − Rev. 9  
UC3842B/D  
1234567...21

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UC2843BN 替代型号

型号 品牌 替代类型 描述 数据表
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