PowerInt公司的InnoSwitch™3-Pro系列产品是数字可控制离线CV/CC QR反激开关集成电路,集成了高压MOSFET,同步整流和FluxLink反馈,极大地简化了全编程高效率电源的开发和制造,通用I2C接口能够动态控制输出电压和电流以及许多可配置特性.主要用在高效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,多化学和通用电池充电器以及可调节CV和CC LED镇流器.本文介绍了InnoSwitch3-Pro (INN3377C)产品亮点和框图,应用电路以及采用InnoSwitchTM3-Pro系列INN3377C–H301和PIC16F18325 MCU的40W电源参考设计RDR-641主要特性和指标,电路图,材料清单和PCB设计图.

RDR-641 - 40 W Variable Output (3 V to 8 V, 5 A; 8 V – 20 V Constant Power) Supply Using InnoSwitch3-Pro (INN3377C) and Microchip’s PIC16F18325 Microcontroller 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 (INN3377C)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

　　InnoSwitch™3-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.初级控制器框图

　　图2.次级控制器框图

　　图3. 3V-8V,5A;8V-20V恒定功率40W可编程电源

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

采用InnoSwitchTM3-ProINN3377C–H301和PIC16F18325 MCU的40W电源参考设计RDR-641

This document is an engineering report describing a 3 V to 8 V, 5A, 8 V to 20 V constant　power charger using the InnoSwitch3-Pro and Microchip’s PIC16F18325 Microcontroller.　PIC16F18325 controls the InnoSwitch3-Pro through I2C by programming its COMMAND　and telemetry registers. 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. It contains the power supply specification, schematic, bill of　materials, transformer documentation, printed circuit layout, and performance data.

40W电源参考设计RDR-641主要特性:

 InnoSwitch3-Pro is industry’s first AC/DC IC with isolated, safety rated integrated feedback and I2C interface

　　 Completely programmable and configurable power supply

　　 Telemetry (read-back) feature with fully configurable protection features

　　 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 V5 2016

　　 <30 mW no-load input power

　　 Integrated thermal protection

　　 Primary sensed overvoltage protection

　　图5.40W电源参考设计RDR-641外形图(正面)

　　图6.40W电源参考设计RDR-641外形图(背面)

　　40W电源参考设计RDR-641主要指标:

　　图7.40W电源参考设计RDR-641电路图

　　40W电源参考设计RDR-641材料清单:

图8.变压器电路图

图9.40W电源参考设计RDR-641 PCB设计图(正面)

图10.40W电源参考设计RDR-641 PCB设计图(背面)