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UCC3890J PDF预览

UCC3890J

更新时间： 2024-01-18 09:43:03
品牌 Logo 应用领域
德州仪器 - TI 信息通信管理
页数 文件大小 规格书
9页 233K
描述
BATTERY CHARGE CONTROLLER, CDIP8, DIP-8

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中文翻译

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UCC3890J 技术参数

生命周期：Obsolete零件包装代码：DIP
包装说明：DIP,针数：8
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.84
模拟集成电路 - 其他类型：BATTERY CHARGE CONTROLLER控制模式：VOLTAGE-MODE
最大输入电压：8.3 V最小输入电压：6.9 V
JESD-30 代码：R-CDIP-T8功能数量：1
端子数量：8最高工作温度：70 °C
最低工作温度：封装主体材料：CERAMIC, METAL-SEALED COFIRED
封装代码：DIP封装形状：RECTANGULAR
封装形式：IN-LINE认证状态：Not Qualified
座面最大高度：5.08 mm表面贴装：NO
切换器配置：SINGLE技术：BICMOS
温度等级：COMMERCIAL端子形式：THROUGH-HOLE
端子节距：2.54 mm端子位置：DUAL
宽度：7.62 mmBase Number Matches：1

UCC3890J 数据手册

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UCC1890  
UCC2890  
UCC3890  
Off-Line Battery Charger Circuit  
FEATURES  
DESCRIPTION  
•
Transformerless Off-Line  
The UCC3890 controller is optimized for use as an off-line, low power, low  
voltage, regulated current supply, ideally suited for battery trickle charger  
applications. The unique circuit topology used in this device can be visual-  
ized as two cascaded flyback converters; each operating in the discon-  
tinuous mode, and both driven from a single external power switch. The  
significant benefit of this approach is the ability to charge low voltage bat-  
teries in off-line applications with no transformer, and low internal losses.  
Operation  
•
•
Low Voltage Operation to 0.8V  
Ideal for Battery Trickle Charger  
Applications  
•
•
Current Mode Operation With  
100mV Shunt  
The control algorithm used by the UCC3890 forces a switch on time in-  
versely proportional to the input line voltage, while the switch off time is  
inversely proportional to the output voltage. This action is automatically  
controlled by an internal feedback loop and reference. The cascaded con-  
figuration allows a large voltage conversion ratio with reasonable switch  
duty cycle.  
Voltage Mode Operation With  
Fixed 1.25V Output or Resistor  
Adjustable Output  
•
•
Efficient BiCMOS Design  
Inherent Short Circuit Protection  
While the UCC3890 is ideally suited for control of constant current battery  
chargers, provision is also made to operate as a fixed 1.25V regulated  
supply, or to use a resistor voltage divider to obtain output voltages higher  
than 1.25V.  
BLOCK DIAGRAM  
Note: This device incorporates patented technology used under license from  
Lambda Electronics, Inc.  
UDG-96052  
3/97  
1234567...9

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