图2.TOPSwitch-JX系列通用输入高效19V 65W反激电源电路图

采用TOPSwitch-JX系列TOP265EG的12V 30W高效待机电源设计案例

12V 30W设计案例主要特性:

Highly energy efficient

Full load efficiency >90%
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Efficiency >87% above 10% load

Average efficiency >90% (25%, 50%, 75%, 100% load points)
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No-load input power <100 mW
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Simplifies meeting ENERGY STAR 2.0, 80 Plus and EuP requirements

725 V MOSFET rating allowed high turns ratio (VOR) and use of 60 V Schottky output diode
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Low cost, low component count and small PCB footprint solution

Performance met without synchronous output rectification
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132 kHz operation optimized core size and efficiency performance

Low-profile eSIP package

Integrated Protection and Reliability Features
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Line under-voltage lock out (UVLO)
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Primary sensed latching output overvoltage shutdown (OVP) with fast AC reset
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Auto recovery output over current (OCP)

Meets limited power source (LPS) <100 VA requirement with a single point of failure

Accurate thermal shutdown with large hysteresis


图3.设计案例PCB外形图(2.97 x 2.14 吋).

设计电源指标:


图4. 12V 30W设计案例电路图

设计案例材料清单:


图5. 12V 30W设计案例变压器电框图

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