大联大品佳集团推出Richtek高整合度USB充电电源适配器解决方案

致力于亚太地区市场的领先半导体元器件分销商---大联大控股宣布，其旗下品佳推出基于Richtek(立锜科技) RT7786和RT7207的高整合USB充电电源适配器解决方案。

大联大品佳代理的Richtek(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充电的应用方面，已取得USB-PD 协会认证。该方案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，Richtek(立锜科技)采用专有的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，且不需在额外增加线路。

图示1-大联大品佳代理的Richtek(立锜科技)RT7786+RT7207USB充电电源适配器解决方案框架图

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