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[原创] Infineon IPA80R450P7 45W开关电源(SMPS)解决方案

关键词:电源管理 开关电源 SMPS LED驱动器 IPA80R450P7

时间:2017-04-05 10:16:20       作者:Infineon       来源:中电网

infineon公司的IPA80R450P7是800V CoolMOSTM P7功率MOSFET系列产品,采用800V超级结技术,具有最好的性能如FOM RDS(on),DPAK RDS(on)和容易使用特性,同时集成电路了齐纳二极管保护,主要用在硬和软开关反激拓扑如LED照明,低功率充电器和适配器,以及消费类电子和太阳能的PFC级.本文介绍了IPA80R450P7主要特性和优势,以及采用IPA80R450P7和ICE2QS03G的45W适配器演示板主要特性和指标,电路图,材料清单和PCB布局图.

800V CoolMOSTM P7 series is a perfect fit for low power SMPS applications by fully addressing market needs in performance, ease-of-use and price/performance ratio. It mainly focuses on flyback applications including adapter and charger, LED driver, audio SMPS, AUX and industrial power. 

The latest 800V CoolMOS™ P7 series sets a new benchmark in 800Vsuper junction technologies and combines best-in-class performance withstate of the art ease-of-use, resulting from Infineon’s over 18 yearspioneering super junction technology innovation.

IPA80R450P7主要特性:

• Best-in-class FOM RDS(on) * Eoss; reduced Qg, Ciss, and Coss

• Best-in-class DPAK RDS(on)

• Best-in-class V(GS)th of 3V and smallest V(GS)th variation of ±0.5V

• Integrated Zener Diode ESD protection

• Best-in-class CoolMOS™ quality and reliability; qualified for industrialgrade applications according to JEDEC (J-STD20 and JESD22)

• Fully optimized portfolio

IPA80R450P7优势:

• Best-in-class performance

• Enabling higher power density designs, BOM savings and lowerassembly costs

• Easy to drive and to parallel

• Better production yield by reducing ESD related failures

• Less production issues and reduced field returns

• Easy to select right parts for fine tuning of designs

IPA80R450P7应用:

Recommended for hard and soft switching flyback topologies for LEDLighting, low power Chargers and Adapters, Audio, AUX power andIndustrial power. Also suitable for PFC stage in Consumer applicationsand Solar.

采用IPA80R450P7和ICE2QS03G的45W适配器演示板

The demo board described in this application note provides a test platformfor the new 800 V CoolMOS™ P7series of high voltage MOSFETs. The adapter uses ICE2QS03G, a second generation currentmode control quasiresonantflyback controller and an IPA80R450P7 800 V CoolMOS™ P7 series power MOSFET. This applicationnote is intended for those that have experience with flyback converter designs and will not go in depth about theoverall design process for flyback converters, but will cover specific design aspects for this controller and 800 VCoolMOS™ P7 in charger and adapter applications. It will also look at the overall benefits that the 800 VCoolMOS™ P7 presents for switchmode power supplies.

This 45 Wadapter demo board is intended to be a form, fit and function test platformfor charger and adapterapplications to show the operation of the 800 V CoolMOS™ P7 as well as the overall controller design. Thedemo board is designed around a quasi-resonant flyback topology for improved switching losses which allowshigher power density designs and lower radiated and conducted emissions. A 45 Wuniversal input isolatedflyback demo board with a 19 V output based on the ICE2QS03G controller and the P7 MOSFET is described inthis application note and test results are presented.

图1.45W适配器演示板外形图

45W适配器演示板主要指标:

45W适配器演示板主要特性:

• Fold back point protection - For a quasi-resonant flyback converter, themaximumpossible output power isincreased when a constant current limit value is used across the entiremains input voltage range. This isusually not desired as this will increase the cost of the transformer and output diode in the case of outputover power conditions. The internal fold back protection is implemented to adjust the VCS voltage limit

according to the bus voltage. Here, the input line voltage is sensed using the current flowing out of the ZC pin,during the MOSFET on-time. As the result, themaximum current limit adjusts with the AC line voltage.

• VCC over voltage and under voltage protection - During normal operation, the Vcc voltage is continuouslymonitored.When the Vcc voltage increases to VVCC OVP or Vcc voltage falls below the under voltage lock outlevel VVCC off, the IC will enter into auto restartmode.

• Over load/open loop protection - In the case of an open control loop, the feedback voltage is pulled up withan internal block. After a fixed blanking time, the IC enters into auto restartmode. In case of a secondaryshort-circuit or overload, the regulation voltage VFB will also be pulled up, the same protection is applied andthe IC will auto restart.

• Adjustable output overvoltage protection - During the off-time of the power switch, the voltage at the zerocrossingpin, ZC, ismonitored for output overvoltage detection. If the voltage is higher than the presetthreshold 3.7 V for a preset period of 100 μs, the IC is latched off.

• Auto restart for over temperature protection - The IC has a built-in over temperature protection function.

When the controller’s temperature reaches 140 °C, the IC will shut down the switch and enters into autorestart. This can protect the power MOSFET fromoverheating.

• Short winding protection - The source current of the MOSFET is sensed via external resistors, R15 and R16. Ifthe voltage at the current sensing pin is higher than the preset threshold VCSSWof 1.68 V during the on-timeof the power switch, the IC is latched off. This constitutes a short winding protection. To avoid an accidentallatch off, a spike blanking time of 190 ns is integrated in the output of internal comparator.

图2.45W适配器演示板电路图

45W适配器演示板材料清单:

图3.45W适配器演示板PCB布局图(顶层)

详情请见:

http://www.infineon.com/dgdl/Infineon-IPA80R450P7-DS-v02_00-EN.pdf?fileId=5546d46255a50e820155d9701ca552be

http://www.infineon.com/dgdl/Infineon-ApplicationNote_EvaluationBoard_45W_adapter_Reference_Design-AN-v02_00-EN.pdf?fileId=5546d46256fb43b30157052a505a5f0e

Infineon-ApplicationNote_EvaluationBoard_45W_adapter_Reference_Design-AN-v02_00-EN.pdf

Infineon-IPA80R450P7-DS-v02_00-EN.pdf

 

 

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