致力于亞太地區(qū)市場的領(lǐng)先半導(dǎo)體元器件分銷商---大聯(lián)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充電電源適配器解決方案。

大聯(lián)大品佳代理的Richtek(立锜科技)推出RT7786+RT7207為一高整合度PWM +USB-PD Controller，它具備許多特征能提升低功率反馳式(Low-power Flyback)變壓器的性能，特別針對(duì)于USB充電的應(yīng)用方面，已取得USB-PD 協(xié)會(huì)認(rèn)證。該方案能以最簡化的回路設(shè)計(jì)完成。使用RT7786+RT7207將能夠同時(shí)實(shí)現(xiàn)低成本、體積小、重量輕的產(chǎn)品設(shè)計(jì)。

為降低待機(jī)功耗，Richtek(立锜科技)采用專有的Green-Mode 設(shè)計(jì)模式，以線性降頻方式低于Light-Load 狀態(tài)。使用專有的Green-Mode設(shè)計(jì)產(chǎn)品將能輕易的符合電源相關(guān)法規(guī)要求。而RT7207為高整合度IC，同時(shí)內(nèi)建CC/CV、LDO、TL431、OVP、OTP、SR、Cable Comp、Charge Pump、PMOS drive、Quick Discharge、Single Fault、PWM Off @ OVP，且不需在額外增加線路。

圖示1-大聯(lián)大品佳代理的Richtek(立锜科技)RT7786+RT7207USB充電電源適配器解決方案框架圖

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