InnoSwitch3－Pro系列电源参考设计

powerint公司的InnoSwitch3-Pro系列大大简化了全可编高效率电源的开发和制造，其通用的I2C接口能动态控制输出电压和电流以及许多可配置特性，非常适合于AC/DC电源应用如高效率USB PD 3.0+PPS/QC适配器，包括QuickCharge，AFC，FCP，SCP在内的多协议适配器，直接充电移动设备充电器，多种化学工具和通用电池充电器，以及可调CV和CC LED镇流器。本文介绍了InnoSwitch3-Pro系列产品亮点，框图，应用电路，以及采用InnoSwitchTM3-Pro INN3368C-H301和Weltrend WT6635P的45W USB PD 3.0 3.3V-16V PPS电源的参考设计DER-702主要指标，主板和子板电路图，材料清单和PCB设计图。

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

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系列应用：

• 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

图1.InnoSwitch3-Pro系列初级控制器框图

图2.InnoSwitch3-Pro系列次级控制器框图

图3.InnoSwitch3-Pro系列3V-8V，5A;8V-20V恒定功率40W可编电源

图4.InnoSwitch3-Pro系列5V/3A，9V/3A;3V-11V PPS USB PD 3.0兼容适配器

参考设计DER-702：

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

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.

参考设计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

图5.参考设计DER-702外形图

图6.参考设计DER-702 PCB顶视图

图7.参考设计DER-702 PCB底视图

图8.参考设计DER-702 PCB子板图：左：前视;右：后视

参考设计DER-702主要指标：

图9.参考设计DER-702 PCB主板电路图

图10.参考设计DER-702 PCB子板电路图

图11.参考设计DER-702变压器电路图

参考设计DER-702材料清单：

图12.参考设计DER-702主板PCB设计图（顶层）

图13.参考设计DER-702主板PCB设计图（底层）

图14.参考设计DER-702子板PCB设计图（顶层）

图15.参考设计DER-702子板PCB设计图（底层）

详情请见：

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