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

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。

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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