【方案介绍】
RT7786 : 一次测反驰式AC/DC PWM IC
RT7207 : 二次测高整合度USB-PD Controller IC

【方案特色】
立锜科技推出RT7786+RT7207为一高整合度PWM +USB-PD Controller, 它具备许多特征能提升低功率反驰式(Low-power Flyback)变压器的性能. 特别针对于USB-PD的应用方面, 已取得USB-PD 协会认证,能以最简化的回路设计完成,使用RT7786+RT7207将能够同时实现低成本、体积小、重量轻的产品设计.

为降低待机功耗, 专有的Green-Mode 设计模式,以线性降频方式低于Light-Load 状态. 使用专有的Green-Mode设计产品将能轻易的符合电源相关法规要求. 而RT7207为高整合度IC,同时内建CC/CV, LDO, TL431, OVP, OTP, SR, Cable Comp, Charge Pump, PMOS drive, Quick Discharge, Single Fault , PWM Off @ OVP不需在额外增加线路,灭少成本

【系统方块图】

 【规格说明】
RT7786 Features
• Designed for adaptive power 
• Wide Vdd Range ( 7V~38V) 
• Adaptive Vo OVP , UVP for < 3V 
• Feedback Loop Fault Protection 
• Adaptive Loop Gain for Loop Stability 
• Adoptive Current Limit to meet LPS
• High Efficiency: 
• CCM/QR Hybrid Control 
• Power Saving < 30mW @ 5V
• Other Protection: 
• Vdd OVP, OCP, OLP, OTP, Adjustable Constant Output Power , Brown in/out protection, Secondary Rectifier Short Protection , Adaptive Vo OVP

RT7207 Features
• USB PD 2.0 Type-C Compliant , Other protocol is optional 
• Highly Integration: 
• ARM M0 MCU embedded 
• Transceiver embedded for BMC. 
• Programmable Type C current mode setting. (default, 1.5A, 3A) 
• CV and CC Control 
• Synchronous rectifier driver and controller (Operate in both DCM and CCM for wide output voltage range (RT7207T)
• BLD pin for quick discharge 
• Shut regulator and Programmable cable compensation built in 
• Charge pump built in for wide VDD operation range ( 3V to 20V ). 
• USBP pin to directly drive external isolation P-MOSFETs . 
• Green mode in standby for power saving 
• Protection: 
• OTP, Adaptive OVP, Programmable UVP, SCP

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