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PowerInt TOP266VG 30W电源参考设计

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发表于 2017-6-28 13:19:31 | 显示全部楼层 |阅读模式
powerint 公司的TOPSwitch-JX系列产品具有高性价比,集成了725V 功率MOSFET,高压开关电流源,多模式PWM控制,振荡器,热关断电路,故障保护以及其它控制电路。在265VAC时无负载的功耗小于100mW,工作频率132kHz,降低变压器和电源尺寸。本文介绍了TOPSwitch-JX系列产品主要特性,功能方框图,以及高效19V 65W电路图和无负载功耗非常低的高效12V 30W电路图,采用TOPSwitch®-JX TOP266VG的30W电源参考设计主要特性,电路图和所用材料清单(BOM)。

TOPSwitch-JX cost effectively incorporates a 725 V power MOSFET, high voltage switched current source, multi-mode PWM control, oscillator, thermal shutdown circuit, fault protection and other control circuitry onto a monolithic device.

TOPSwitch-JX系列产品主要特性:

EcoSmart® - Energy Efficient

• Energy efficient over entire load range

• No-load consumption below 100 mW at 265 VAC

• Up to 750 mW standby output power for 1 W input at 230 VAC

High Design Flexibility for Low System Cost

• Multi-mode PWM control maximizes efficiency at all loads

• 132 kHz operation reduces transformer and power supply size

• 66 kHz option for highest efficiency requirements

• Accurate programmable current limit

• Optimized line feed-forward for line ripple rejection

• Frequency jittering reduces EMI filter cost

• Fully integrated soft-start for minimum startup stress

• 725 V rated MOSFET

• Simplifies meeting design derating requirements

Extensive Protection Features

• Auto-restart limits power delivery to <3% during overload faults

• Output short-circuit protection (SCP)

• Output overcurrent protection (OCP)

• Output overload protection (OPP)

• Output overvoltage protection (OVP)

• User programmable for hysteretic/latching shutdown

• Simple fast AC reset

• Primary or secondary sensed

• Line undervoltage (UV) detection prevents turn-off glitches

• Line overvoltage (OV) shutdown extends line surge withstand

• Accurate thermal shutdown with large hysteresis (OTP)

Advanced Package Options

• eDIP™-12 package:

• Low profile horizontal orientation for ultra-slim designs

• Heat transfer to both PCB and heat sink

• Optional external heat sink provides thermal impedance equivalent to a TO-220

• eSIP®-7C package:

• Vertical orientation for minimum PCB footprint

• Simple heat sink mounting using clip provides thermal impedance equivalent to a TO-220

• Extended creepage to DRAIN pin

• Heat sink is connected to SOURCE for low EMI

91.gif
图1。TOPSwitch-JX系列功能方框图(E和V 封装).
92.gif
图2。高效19V 65W电路图:通用输入反激电源,无负载功耗低
93.gif

图3。高效12V 30W电路图:通用输入反激电源,无负载功耗非常低采用TOPSwitch®-JX TOP266VG的30W电源参考设计指标:85VAC–264 VAC Input; 12V, 2.5A Output

30W电源参考设计主要特性:

• Highly energy efficient
• Very low no-load input power: < 80 mW at 230 VAC
• Full load efficiency >84% at 115 VAC / 47 Hz
• Efficiency >80% above 8% load
• Average efficiency >84% (25%, 50%, 75%, 100% load points)
• 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
• Low cost, low component count and small PCB footprint solution
• 132 kHz operation optimizes core size and efficiency performance
• Low-profile eDIP package with no external heatsink
• Integrated Protection and Reliability Features
• Line under-voltage lock out (UVLO) and line overvoltage shutdown prevents output glitching and improves reliability
• Primary sensed output overvoltage shutdown (OVP) eliminates second optocoupler
• Auto recovery output over current (OCP) and short circuit protection
• Flat overload power with line voltage
• Meets limited power source (LPS) <100 VA requirement with a single point of failure
• Accurate thermal shutdown with large hysteresis

94.gif
图4。30W电源参考设计外形图
95.gif
图5。30W电源参考设计电路图

30W电源参考设计材料清单(BOM):
96.gif
97.gif

98.gif
图6。采用光耦合达林顿配置降低反馈电流和无负载输入功率

详情请见:
RDR-242 - 30 W Supply
topjx_family_datasheet.pdf (2.4 MB, 下载次数: 0)
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