powerint公司的InnoSwitch3-Pro系列大大簡化了全可編高效率電源的開發和制造，其通用的I2C接口能動態控制輸出電壓和電流以及許多可配置特性，非常適合于AC/DC電源應用如高效率USB PD 3.0+PPS/QC適配器，包括QuickCharge，AFC，FCP，SCP在內的多協議適配器，直接充電移動設備充電器，多種化學工具和通用電池充電器，以及可調CV和CC LED鎮流器。本文介紹了InnoSwitch3-Pro系列產品亮點，框圖，應用電路，以及采用InnoSwitchTM3-Pro INN3368C-H301和Weltrend WT6635P的45W USB PD 3.0 3.3V-16V PPS電源的參考設計DER-702主要指標，主板和子板電路圖，材料清單和PCB設計圖。

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系列產品亮點：

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

Highly Integrated， Compact Footprint

? Multi-mode Quasi-Resonant （QR） / DCM / CCM flyback controller，650 V or 725 V MOSFET， 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 MOSFET 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 dissipation

Advanced Protection / Safety Features

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

? Output OV/UV fault detection with independently configuredresponses

? Secondary FET / diode short protection

? Open SR FET gate detection

? Hysteretic thermal shutdown

? Programmable watchdog timer for system faults

Full Safety and Regulatory Compliance

? Reinforced insulation

? Isolation voltage 》4000 VAC

? 100% production HIPOT compliance testing

? UL1577 and TUV （EN60950） safety approved

Green Package

? Halogen free and RoHS compliant

InnoSwitch3-Pro系列應用：

? High efficiency USB PD 3.0 + PPS/QC adapters

? Multiprotocol 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

圖1.InnoSwitch3-Pro系列初級控制器框圖

圖2.InnoSwitch3-Pro系列次級控制器框圖

圖3.InnoSwitch3-Pro系列3V-8V，5A;8V-20V恒定功率40W可編電源

圖4.InnoSwitch3-Pro系列5V/3A，9V/3A;3V-11V PPS USB PD 3.0兼容適配器

參考設計DER-702：

采用InnoSwitchTM3-Pro INN3368C-H301和Weltrend WT6635P的45W USB PD 3.0 3.3V-16V PPS電源

This document is an engineering report describing a 5 V / 3 A， 9 V / 3 A， 15 V / 3 A， 20 V 2.25 A USB PD PPS power supply. This power supply uses InnoSwitch3-Pro INN3368C IC and Weltrend WT6635P USB PD controller. This design shows the high power density and efficiency that is possible due to the high level of integration of the InnoSwitch3-Pro controller providing exceptional performance.

參考設計DER-702主要特性：

? InnoSwitch3-Pro - digitally controllable CV/CC QR flyback switcher IC with integrated high-voltage MOSFET， synchronous rectification and FluxLinkTM feedback

? I2C interface enables low pin count USB PD controller （10 pin）

? Sophisticated telemetry and comprehensive protection features

? USB PD 3.0 with PPS highly optimized low pin count USB PD controller WT6635P

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

? Insensitive to transformer variation

? Meets DOE6 and CoC V5 2016 efficiency requirement （》1% efficiency margin）

? Micro stepping of voltages and CC thresholds in compliance with PPS protocol

? Output overvoltage and overcurrent protection

? 《30 mW no-load input power

? Integrated thermal protection

? 20 mV voltage step / 50 mA current step in PPS mode

圖5.參考設計DER-702外形圖

圖6.參考設計DER-702 PCB頂視圖

圖7.參考設計DER-702 PCB底視圖

圖8.參考設計DER-702 PCB子板圖：左：前視;右：后視

參考設計DER-702主要指標：

圖9.參考設計DER-702 PCB主板電路圖

圖10.參考設計DER-702 PCB子板電路圖

圖11.參考設計DER-702變壓器電路圖

參考設計DER-702材料清單：

圖12.參考設計DER-702主板PCB設計圖（頂層）

圖13.參考設計DER-702主板PCB設計圖（底層）

圖14.參考設計DER-702子板PCB設計圖（頂層）

圖15.參考設計DER-702子板PCB設計圖（底層）

詳情請見：

ac-dc.powerint.cn/design-support/product-documents/data-sheets/innoswitch3-pro-data-sheet/“》https://ac-dc.powerint.cn/design-support/product-documents/data-sheets/innoswitch3-pro-data-sheet/

innoswitch3-pro_family_datasheet.pdf

der-702_45watt_usb_pd_3_and_pps_power_supply_using_innoswitch3-pro_and_weltrend_controller.rar