原标题：PowerInt InnoSwitch3－Pro100W USB PD3.0电源参考设计DER－805

　　Power Integrations公司的InnoSwitch3-Pro系列是集成高压MOSFET,同步整流和FluxLink反馈功能的数控恒压/恒流离线反激式准谐振开关集成块,外接单片机或专用微处理器,通过I2C接口实现数控,动态调整电源电压及电流,通过处理器中断实现遥测状态回读,可实现对各种功能的设定,具有多模式准谐振(QR)/CCM反激式控制器,高压开关,次级侧检测和同步整流驱动器,可在所有输入电压及负载下实现效率的优化,反馈方式采用内部集成的FluxLink™技术,且满足HIPOT(高压绝缘)要求,即时快速的动态响应,集成了3.6 V电源,用于为外部微控制器(MCU)供电.系列产品距有先进的保护/安全特性,包括对输入电压进行监测,以便进行精确的电压缓升/跌落保护和过压保护,可单独设定输出过压/欠压故障的响应方式,SR FET栅极驱动开路检测,迟滞热关断保护,可对用于系统故障情况下的“看门狗”电路响应时间进行设定,提供电源状态和故障监测的遥测技术.主要用在高效率USB PD 3.0 + PPS/QC适配器,多协议适配器包括QuickCharge, AFC, FCP, SCP以及直充移动设备充电器,多化学类型工具充电器和通用电池充电器和可调恒压及恒流LED镇流器设计. 中电网为您整理如下详细资料，本文介绍了InnoSwitch3-Pro系列产品亮点,初边和次级控制器框图,几种应用电路,以及100WUSB PD3.0电源参考设计DER-805主要特性和指标,电路图,材料清单和PCB设计图.

　　100W USB PD3.0Power SupplyWith 3.3 V –21V PPS Output Using InnoSwitchTM3-Pro GaN-based INN3370C-H302and VIA Labs VP302

　　The InnoSwitch™3-Pro series family of ICs dramatically simplifies thedevelopment and manufacturing of fully programmable, highly efficientpower supplies, particularly those in compact enclosures. The universalI2C interface enables dynamic control of output voltage and currentalong with many configurable features. Telemetry provides reporting　of programmed features and fault modes.

　　InnoSwitch3-Pro devices are ideal for AC/DC power supply applicationswhere fine (10 mV, 50 mA) output voltage and current adjustment arenecessary. Typical implementations comprise a system microprocessoror dedicated microcontroller with an I2C port that is used to configure,control and supervise operation of the power sub-system. The uVCC pinprovides a bias supply for the microprocessor in stand-alone implementationssuch as USB PD adapters and chargers.

　　InnoSwitch3-Pro系列产品亮点:

　　Digitally Controlled via I2C Interface

　　• Dynamic adjustment of power supply voltage and current

　　• Telemetry for power supply status and fault monitoring

　　• Comprehensive set of configurable protection features

　　• PowiGaN™ technology – up to 100 W without heatsinks (INN3378C,INN3379C and INN3370C)

　　Highly Integrated, Compact Footprint

　　• Multi-mode Quasi-Resonant (QR) / DCM / CCM flyback controller,high-voltage switch, secondary-side sensing and synchronousrectifier driver

　　• Optimized efficiency across line and load range

　　• Integrated FluxLink™, HIPOT-isolated, feedback link

　　• Instantaneous transient response

　　• Drives low-cost N-channel FET series load switch

　　• Integrated 3.6 V supply for external MCU

　　EcoSmart™ – Energy Efficient

　　• Less than 30 mW no-load including line sense and MCU

　　• Enables power supply designs that easily comply with all globalenergy efficiency regulations

　　• Low heat dissipationAdvanced Protection / Safety Features

　　• Input voltage monitoring with accurate brown-in/brown-out andovervoltage protection

　　• Output OV/UV fault detection with independently configuredresponses

　　• Open SR FET gate detection

　　• Hysteretic thermal shutdown

　　• Programmable watchdog timer for system faultsFull Safety and Regulatory Compliance

　　• Reinforced insulation

　　• Isolation voltage >4000 VAC

　　• 100% production HIPOT compliance testing

　　• UL1577 and TUV (EN60950) safety approvedGreen Package

　　• Halogen free and RoHS compliant

　　InnoSwitch3-Pro系列应用:

　　• High efficiency USB PD 3.0 + PPS/QC adapters

　　• Multi protocol adapters including QuickCharge, AFC, FCP, SCP

　　• Direct-charge mobile device chargers

　　• Multi-chemistry tool and general purpose battery chargers

　　• Adjustable CV and CC LED ballast

图1.InnoSwitch3-Pro系列典型应用

图2.InnoSwitch3-Pro系列初边控制器框图

图3.InnoSwitch3-Pro系列次级边控制器框图

　　图4.InnoSwitch3-Pro系列3V-8V/5A;8V-20V恒定功率40W可编电源电路图

　　图5.InnoSwitch3-Pro系列5V/3A;9V/3A;3.3V-11V PPS USB PD3.0兼容适配器电路图

　　图6.InnoSwitch3-Pro系列5V/3A;9V/3A;15V/3A;20V/3A;3.3V-21V PPS USB PD3.0兼容适配器电路图

　　参考设计DER-805

　　This document is an engineering report describing a 3.3 V – 21 V / 5 A PPS output USB Type-C and USB PD charger using the HiperPFS-4 PFS7628C PFC controller, InnoSwitch3- Pro flyback controller and VIA Labs VP302 USB Type-C USB PD controller. This design shows the high power density and efficiency that is possible due to the high level of integration of the HiperPFS-4 and InnoSwitch3-Pro controllers.

　　参考设计DER-805主要特性:

　　 InnoSwitch3-Pro is industry first AC/DC IC with isolated, safety rated integrated feedback controller

　　 All the benefits of secondary-side control with the simplicity of primary-side regulation

　　 Insensitive to transformer variation

　　 Built in synchronous rectification for high efficiency

　　 Meets DOE6 and CoC Tier 2 V5 2016

　　<50 mW no-load input power at 230 VAC

　　 Primary sensed overvoltage protection

　　 Very high power density using GaN switch

　　 14.5 W / inch3 without enclosure

　　 Very low component count

　　 EMI filter and PFC stage – 44 components

　　 Flyback stage - 52 components

　　 USB PD controller stage - 14 components

　　 Very high average efficiency

　　 3.3 V Output – 89.33% at 115 VAC and 87.14% at 230 VAC

　　 5 V Output – 91.53% at 115 VAC and 91.49% at 230 VAC

　　 9 V Output – 91.96% at 115 VAC and 92.59% at 230 VAC

　　 15 V Output – 90.80% at 115 VAC and 90.48% at 230 VAC

　　 20 V Output – 91.09% at 115 VAC and 91.17% at 230 VAC

图7.参考设计DER-805外形图(正面)

图8.参考设计DER-805外形图(背面)

　　参考设计DER-805主要指标:

图9.输入保护和EMI滤波器级电路图

图10.PFC级电路图

图11.反激级电路图

图12.USBD PD控制器级电路图