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UCC2581L PDF预览

UCC2581L

更新时间： 2024-12-01 21:11:19
品牌 Logo 应用领域
德州仪器 - TI 信息通信管理开关
页数 文件大小 规格书
16页 929K
描述
1A SWITCHING CONTROLLER, 100kHz SWITCHING FREQ-MAX, CQCC20

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中文翻译

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UCC2581L 技术参数

生命周期：Obsolete包装说明：QCCN,
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.75
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：VOLTAGE-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：6.8 V
标称输入电压：10 VJESD-30 代码：S-CQCC-N20
长度：8.89 mm功能数量：1
端子数量：20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：CERAMIC, METAL-SEALED COFIRED封装代码：QCCN
封装形状：SQUARE封装形式：CHIP CARRIER
认证状态：Not Qualified座面最大高度：2.54 mm
表面贴装：YES切换器配置：SINGLE
最大切换频率：100 kHz技术：BICMOS
温度等级：INDUSTRIAL端子形式：NO LEAD
端子节距：1.27 mm端子位置：QUAD
宽度：8.89 mmBase Number Matches：1

UCC2581L 数据手册

 浏览型号UCC2581L的Datasheet PDF文件第2页浏览型号UCC2581L的Datasheet PDF文件第3页浏览型号UCC2581L的Datasheet PDF文件第4页浏览型号UCC2581L的Datasheet PDF文件第5页浏览型号UCC2581L的Datasheet PDF文件第6页浏览型号UCC2581L的Datasheet PDF文件第7页 
application  
INFO  
UCC1581  
UCC2581  
UCC3581  
available  
Micropower Voltage Mode PWM  
BLOCK DIAGRAM  
FEATURES  
• Low 85µA Startup Current  
• Low 300µA Operating Current  
• Automatically Disabled  
Startup Preregulator  
• Programmable Minimum Duty  
Cycle with Cycle Skipping  
• Programmable Maximum  
Duty Cycle  
• Output Current 1A Peak  
Source and Sink  
• Programmable Soft Start  
• Programmable Oscillator  
Frequency  
• External Oscillator  
Synchronization Capability  
UDG-95011-1  
Note: Pin Connection shown for 14-pin Package  
DESCRIPTION  
The UCC3581 voltage mode pulse width modulator is de- A linear preregulator driver in conjunction with an exter-  
signed to control low power isolated DC - DC converters nal depletion mode N-MOSFET provides initial controller  
in applications such as Subscriber Line Power (ISDN power. Once the bootstrap supply is functional, the  
I.430). Primarily used for single switch forward and preregulator is shut down to conserve power. During light  
flyback converters, the UCC3581 features BiCMOS cir- load, power is saved by providing a programmable mini-  
cuitry for low startup and operating current, while main- mum duty cycle clamp. When a duty cycle below the  
taining the ability to drive power MOSFETs at minimum is called for, the modulator skips cycles to pro-  
frequencies up to 100kHz. The UCC3581 oscillator al- vide the correct average duty cycle required for output  
lows the flexibility to program both the frequency and the regulation. This effectively reduces the switching fre-  
maximum duty cycle with two resistors and a capacitor. A quency, saving significant gate drive and power stage  
TTL level input is also provided to allow synchronization losses.  
to an external frequency source.  
The UCC3581 is available in 14-pin plastic and ceramic  
The UCC3581 includes programmable soft start circuitry, dual-in-line packages and in a 14-pin narrow body small  
overcurrent detection, a 7.5V linear preregulator to con- outline IC package (SOIC). The UCC1581 is specified for  
trol chip VDD during startup, and an on-board 4.0V logic  
supply.  
operation from −55°C to +125°C, the UCC2581 is speci-  
fied for operation from −40°C to +85°C, and the  
UCC3581 is specified for operation from 0°C to +70°C.  
The UCC3581 provides functions to maximize light load  
efficiency that are not normally found in PWM controllers.  
MARCH 1999 - REVISED MARCH 2003 - SLUS295B  
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