与LM317相关的参考设计
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具有 85-265 VAC 输入、高输出储能的初级侧稳压反激,适用于长时输出
PMP8930参考设计采用UCC28710初级侧稳压反激式控制20V输出,从一个万能交流输入。一个大容量电容器与慢电荷快速放电电路被放置在回扫输出,以提供长保持时间为以下降压型DC-DC阶段。TPS54335用作控制器和功率级用于主4V或12V输出。该UCC28710的谷底导通使这种低成本的设计,实现了83%的最大负荷效率;空载损耗低于70mW。
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Primary-Side Regulated Flyback with 85-265VAC Input, high output energy storage for long hold up out - PMP8930.4 - TI Tool Folder
The PMP8930 reference design uses the UCC28710 primary-side regulated flyback controller to generate a 20V output from a univeral AC input. a bulk capacitor with slow-charge-fast-discharge circuit is placed at flyback output to provide long hold up time for the following step-down DC-DC stages. TPS54335 is used as the controller and power stage for the main 4V or 12V output. The valley switching of the UCC28710 allows this low-cost design to achieve a maximum load efficiency of 83%; no load losses are less than 70mW.
更多参考设计
LM317功能数量 |
1
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LM317端子数量 |
3
|
LM317最大输出电流 |
1 A
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LM317最大输出电压 |
37 V
|
LM317最小输出电压 |
1.2 V
|
LM317加工封装描述 |
SOT-223, 4 PIN
|
LM317状态 |
ACTIVE
|
LM317工艺 |
BIPOLAR
|
LM317包装形状 |
矩形的
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LM317包装尺寸 |
SMALL OUTLINE
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LM317表面贴装 |
Yes
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LM317端子形式 |
GULL WING
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LM317端子间距 |
2.3 mm
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LM317端子涂层 |
锡 铅
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LM317端子位置 |
双
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LM317包装材料 |
塑料/环氧树脂
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LM317调节类型 |
可调正电压稳压器
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