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UC3825AN 参数 Datasheet PDF下载

UC3825AN图片预览
型号: UC3825AN
PDF下载: 下载PDF文件 查看货源
内容描述: 高速PWM控制器 [High Speed PWM Controller]
分类和应用: 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信息通信管理PC
文件页数/大小: 15 页 / 302 K
品牌: TI [ TEXAS INSTRUMENTS ]
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ꢀꢁꢂ ꢃ ꢄ ꢅ ꢆꢇ ꢀꢁꢄ ꢃ ꢄ ꢅ ꢆꢇ ꢀ ꢁꢄ ꢃꢄ ꢅꢈ ꢇ  
ꢀꢁꢅ ꢃ ꢄ ꢅ ꢆꢇ ꢀꢁꢅ ꢃ ꢄ ꢅ ꢈꢇ ꢀ ꢁꢂ ꢃꢄ ꢉꢆ ꢇ  
www.ti.com  
ꢀꢁꢄ ꢃ ꢄ ꢉ ꢆꢇ ꢀꢁꢄ ꢃ ꢄ ꢉ ꢈꢇ ꢀꢁꢅ ꢃ ꢄ ꢉ ꢆꢇ ꢀ ꢁꢅ ꢃꢄ ꢉꢈ  
SLUS334C − AUGUST 1995 − REVISED AUGUST 2004  
CONTROL METHODS  
Current Mode  
Voltage Mode  
UDG−95110  
UDG−95109  
.
Figure 8. Control Methods  
SYNCHRONIZATION  
The oscillator can be synchronized by an external pulse inserted in series with the timing capacitor. Program the free  
running frequency of the oscillator to be 10% to 15% slower than the desired synchronous frequency. The pulse width  
should be greater than 10 ns and less than half the discharge time of the oscillator. The rising edge of the CLK/LEB pin  
can be used to generate a synchronizing pulse for other chips. Note that the CLK/LEB pin no longer accepts an incoming  
synchronizing signal.  
UDG−95111  
UDG−95113  
Figure 9. General Oscillator Synchronization  
Figure 10. Two Unit Interface  
UDG−95112  
Figure 11. Operational Waveforms  
9