Shenzhen CXW Technology., Co Ltd
15 years of experience
Solutions of PD Charger
GPE 20W PD fast charging charger disassembly: CX7527C+CX7538B
June 06, 2022

The GPE 20W fast charging can achieve such MiNi, high efficiency, and precise simplification thanks to the support of a full set of highly integrated 20W PD fast charging solutions CX7527C+CX7538B. Provide 20W PD solution, 22.5W, 25W, 27W, 30W, 33W PD fast charging solution development, fully assisting IPHONE13 in achieving ultra long range, efficient fast charging!


Regarding the iPhone series, users still tend to use a 20W PD fast charging charger to solve their phone charging problems. 20W PD is still the mainstream and the trend.


Recently, I received a GPE 20W charger that supports pure PD fast charging and can meet the daily fast charging needs of iPhone 13. From the disassembly of the GPE 20W PD fast charging charger, it can be seen that the entire set of fast charging solutions uses high cost performance CX7527C+CX7538B


Appearance information of GPE 20W fast charging charger:

  • Model: GPE020D-1

  • Input: 100-240V~50/60HZ 0.8A

  • Output: 5V3A, 9V2.22A, 12V1.67A

  • The charger has passed ETL certification and VI level energy efficiency certification.

  • Using ChargerLAB POWER-Z KT002, it was found that the USB-C port only supports the PD3.0 fast charging protocol.

  • In addition, the PDO message shows that the C port also has three fixed voltage ranges: 5V3A, 9V2.22A, and 12V1.67A.

将充电器拆开,可以清楚地看到该款充电器开关电源主控芯片采用CX7527C,这是一颗高性能多模式PWM反激式控制器。该产品方便用户以较少的外围元器、较低的系统成本设计出高性能的交直流转换开关电源。其提供了极为全面和性能优异的智能化保护功能,包括逐周期过流保护、过载保护、软启动、芯片过温保护、VDD欠压/过压锁定保护功能。

芯片具有自动识别负载大小,自动调整工作模式的功能。在满载或重载条件下,芯片工作在固定65KHz频率。当负载减轻,芯片工作频率降低,有效降低开关损耗。当负载处于极轻载或空载条件时,芯片处于间隔模式。

CX7527C内置智能抖频技术,降低系统在降频模式所产生的电磁干扰和输出纹波。独特的工作模式使得音频能量最小化,无音频噪声。采用SOP-8封装,为需要超低待机功耗的高性价比反激式开关电源系统提供了一个很好的设计平台。

CX7527C+CX7538B快充方案的还有欧姆电机20W PD快充、佳域20W迷你PD快充充电器、羽博20W 1A1C快充充电器、飞利浦迷你20W快充充电器、第一卫20W快充小冰粒充电器等产品,此外该套20W PD快充方案已被多家知名品牌采用。

而,次级同步整流芯片采用CX7538B。这是一颗高性能的开关电源次级侧同步整流器芯片,在开关电源中轻松满足6级能效,是肖特基的理想替换方案。CX7538B支持最高150KHz开关频率,内置12mΩ低导阻NMOS管,发热远低于肖特基二极管,大幅度降低温度,提高转换效率。

CX7538B 支持开关电源的CCM/QR/DCM模式,非常适合3.3~12V快充同步整流使用,内置耐压60V,12mΩ的同步整流管,可提供3A输出。比肖特基效率最高提升6%,工作电压范围宽,外围元件非常简单,在宽电压应用时,外围只需一颗电容。

USB PD协议芯片可以使用CX2919C,支持QC2.0、QC3.0、AFC、FCP、SCP、HVSCP、PD和PPS等多种快充协议,内部集成 10mΩ VBUS 通路功率开关管,并且集成10mΩ电流检测电阻,支持完善的保护功能,节省外围元件数量,简化电路,降低成本。采用ESOP8封装。

GPE快充能够做到如此MiNi、高效、精简化,得益于全套高集成20W PD快充方案CX7527C+CX7538B的加持。提供20W、22.5W、25W、27W、30W、33W PD快充方案开发,全面助力IPHONE13实现超长续航、高效快充!




HOME

PRODUCT

ABOUT

CONTACT