20W PD fast charging charger from ANKER is equipped with 1A1C dual fast charging interface, supports QC and PD universal fast charging protocols, and has three groups of fixed voltage gears, namely 5V3A, 9V2.22A and 12V1.67A, which can meet the daily charging needs of iPhone models and Android phones and devices.

Anke 20W fast charging charger appearance

It is measured that USB-C port supports QC3.0/4+, FCP, SCP, AFC, PD3.0, PPS, DCP and Apple 2.4A charging protocols.

PDO message shows that USB-C port also has three groups of fixed voltage gears: 5V3A, 9V2.22A and 12V1.67A, and two groups of PPS voltage gears: 3.3-5.9V3A and 3.3-11V1.8A.

It is measured that USB-A port supports QC3.0, FCP, SCP, AFC, DCP and Apple 2.4A charging protocols.

PCBA module is 46.65mm in length, 37.29mm in width and 20.19mm in height.

The USB-C module is welded on a separate board.

The back of the main board is provided with a rectifier bridge, a switching power supply primary chip, an optical coupler and a protocol chip.

The main control chip of ANKER 20W charger switching power supply adopts CXW CX7528, which is a current-mode PWM control chip with built-in high-voltage power MOSFET, and is applied to the power supply scheme with power below 25W.

CX7528 works at a fixed switching frequency in PWM mode, which is precisely set internally. When there is no load or light load, the working frequency is adjusted by the chip. The chip can work in green mode, so as to reduce the loss during light load and improve the working efficiency of the whole machine. Only a small current is needed during starting and working, and a large resistor can be used in the starting circuit to further reduce the power consumption during standby.

The chip has a built-in slope compensation circuit, which can avoid subharmonic oscillation and improve the stability of the system when the circuit works at a large duty cycle. A Leading-edge blanking time is built in to eliminate the influence of diode reverse recovery current in the buffer network on the circuit.

The secondary synchronous rectifier chip adopts CXW CX7538B, which is a high-performance synchronous rectifier chip on the secondary side of switching power supply. It can easily meet the six-level energy efficiency in switching power supply and is an ideal alternative to Schottky. CX7538B supports switching frequency up to 150KHz,built-in 11mΩ NMOS transistor with low conductance. The heating is much lower than Schottky diode, which greatly reduces the temperature and improves the conversion efficiency.

CXW CX7538B supports CCM/QR/DCM mode of switching power supply, which is very suitable for 3.3~12V fast charging synchronous rectification,built-in 60V withstand voltage and 11 mω Synchronous rectifier transistor,and can provide 3A output. Compared with Schottky, the efficiency is improved by up to 6%, the working voltage range is wide, and the peripheral components are very simple. In wide voltage applications, only need one capacitor.

CXW fast charging solution has been adopted by many products of well-known brands such as Moto, AT&T, hoco., Belkin, Baseus, Pisen, GPE, tamas, Ohm,aigo, Xinspower,Yoobao, Philips,DIVI and so on.

ANKER 20W charger supports QC and PD fast charging protocols in performance, and is well compatible with Android and iPhone devices. This charger adopts the complete set of CX7528+CX7538B power supply solution.because of the high integration solution, it can effectively simplify the peripheral circuits and reduce the design difficulty. It is the best choice for the 20W fast charging solution in the market.