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[原创] Powerint InnoSwitch3-EP 10W双输出电源参考设计DER-745

关键词:电源管理 AC/DC转换器 开关电源

时间:2019-05-23 10:50:21       来源:中电网

Power Integrations公司的InnoSwitch™3-EP系列产品是离线CV/CC QR反激开关集成电路,集成了725 V/900 V MOSFET,同步整流和FluxLink反馈,从而简化反馈电源转换器的设计和制造,特别是需要高效率和/或紧凑尺寸的转换器.InnoSwitch™3-EP系列集成了多种保护特性包括线过压和欠压保护,输出过压和过流限制以及超温关断.满足EcoSmart™能量效率要求,无负载功耗小于15mW,低热损耗,隔离电压大于4000VAC,100%产品进行HIPOT测试,得到UL1577和TUV(EN60950)安全认证,应用电源高达45W,主要用在家用电器,计算机和消费类电子,以及公用表,智能电网和工业电源.本文介绍了InnoSwitch™3-EP系列产品亮点,主和次控制器框图,应用电路,以及采用InnoSwitch3-EP 900 V 的10 W双输出电源的参考设计DER-745主要特性和电指标,电路图,材料清单和变压器电路图与PCB设计图.

The InnoSwitch™3-EP family of ICs dramatically simplifies the designand manufacture of flyback power converters, particularly thoserequiring high efficiency and/or compact size. The InnoSwitch3-EPfamily combines primary and secondary controllers and safety-rated feedback into a single IC.

InnoSwitch3-EP family devices incorporate multiple protection featuresincluding line over and undervoltage protection, output overvoltageand over-current limiting, and over-temperature shutdown. Devices areavailable with standard and peak power delivery options, andcommonly used auto-restart protection behaviors.

InnoSwitch™3-EP系列产品亮点:

Highly Integrated, Compact Footprint
• Very high efficiency across full load range
• Incorporates a multi-mode Quasi-Resonant(QR)/CCM flybackcontroller, 725 V/900 V MOSFET, secondary-side sensing andsynchronous rectification driver
• Excellent multi-output cross regulation with weighted secondary-sideregulation (SSR) feedback and synch FETs
• Integrated FluxLink™, HIPOT-isolated, feedback link
• Exceptional CV/CC accuracy, independent of external components
• Adjustable accurate output current sense using external output senseresistor
EcoSmart™ – Energy Efficient
• Less than 15 mW no-load including line sense
• Easily meets all global energy efficiency regulations
• Low heat dissipation
Advanced Protection / Safety Features
• Open SR FET-gate detection
• Fast input line UV/OV protection
• Auto-restart fault response for output OVP
Optional Features
• Auto-restart output UV protection with option for peak power delivery
Full Safety and Regulatory Compliance
• Reinforced isolation
• Isolation voltage >4000 VAC
• 100% production HIPOT testing
• UL1577 and TUV (EN60950) safety approved
• Excellent noise immunity enables designs that achieve class “A”performance criteria for EN61000-4 suite; EN61000-4-2, 4-3(30 V/m), 4-4, 4-5, 4-6, 4-8 (100 A/m) and 4-9 (1000 A/m)
Green Package
• Halogen free and RoHS compliant

InnoSwitch™3-EP系列应用:

• Auxiliary, standby and bias power supplies for appliances, computersand consumer products
• Utility meter, smart grid and industrial power supplies

图1.InnoSwitch™3-EP系列应用电路

图2.InnoSwitch™3-EP系列主控制器框图

图3.InnoSwitch™3-EP系列次控制器框图

图3.InnoSwitch™3-EP系列HVAC应用电路:DER-611;5V/0.3A和12V/0.7A

采用InnoSwitch3-EP 900 V的10 W双输出电源的参考设计DER-745

参考设计DER-745主要特性:

 InnoSwitch3-EP 900 V - industry first AC/DC ICs with isolated, safety rated integrated feedback, 900 V MOSFET
 Built in synchronous rectification for >85% efficiency at nominal AC input  All the benefits of secondary side control with the simplicity of primary side regulation
 Insensitive to transformer variation
 Extremely fast transient response independent of load timing
 Meets output cross regulation requirements without linear regulators
 Primary sensed output overvoltage protection (OVP) eliminates optocoupler for fault protection
 Accurate thermal protection with hysteretic shutdown
 Input voltage monitor with accurate brown-in / brown-out and overvoltage protection
This document is an engineering report describing a 0.3 A, 5 V and 0.7 A, 12 V dual output embedded power supply utilizing INN3692C-H606 from the InnoSwitch3-EP family of ICs.
This design shows the high power density and efficiency that is possible due to the high level of integration while still providing exceptional performance.
The document contains the power supply specification, schematic, bill of materials, transformer documentation, printed circuit layout, and performance data.

图4.参考设计DER-745外形图(正面)

图5.参考设计DER-745外形图(背面)
参考设计DER-745主要指标:


图6.参考设计DER-745电路图
参考设计DER-745材料清单:


图7.参考设计DER-745变压器电路图

图8.参考设计DER-745 PCB设计图(正面)

图9.参考设计DER-745 PCB设计图(背面)
详情请见:
ac-dc.powerint.cn/sites/default/files/product_document/data_sheet/innoswitch3-ep_family_datasheet.pdf">https://ac-dc.powerint.cn/sites/default/files/product_document/data_sheet/innoswitch3-ep_family_datasheet.pdf
https://ac-dc.powerint.cn/design-support/reference-designs/design-examples/der-745-10watt-dual-output-power-supply-using-innoswitch3-ep-900v/
innoswitch3-ep_family_datasheet.pdf
der-745_10watt_dual_output_power_supply_using_innoswitch3-ep.pdf

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