Tamas adopts the CXW 20W PD chip scheme CX7527C+CX7538B for fast charging. This 20W PD fast charging scheme has been adopted by well-known brands and factories such as Belkin, Momis, Philips, Mosuo, Ohm Motor, Xinsbao, Jiayu, Yubo, Pifan, and First Guard, and has been unanimously recognized and highly praised by customers.

Today, we will disassemble and eva1uate the performance of this Tamas fast charger.

Tamas fast charging adopts Chengxin Micro 20W PD chip scheme

Shell LWH: 32.02mm * 28.03mm * 25.99mm

Tamas fast charging adopts a "small block" design, with built-in CX7527C+CX7538B highly integrated PD fast charging chip solution, which effectively simplifies the peripheral circuit as a whole and can assist FAE engineers in reference design, effectively reducing overall costs and improving product launch speed.

Model: AP130

Input: 100-240V~50/60HZ 0.5A

Output: 5V3A, 9V2.22A

Retailer: Tama Electronics Industry Co., Ltd

The product has passed PSE certification and is produced by Lixun Precision OEM.

Using ChargerLAB POWER-Z KT002, it was found that the USB-C port supports Samsung 5V2A, DCP protocols, as well as QC3.0, PE2.0, and PD3.0 fast charging protocols. At the same time, it also has two fixed voltage ranges of 5V3A and 9V2.22A.

Tamas fast charging adopts Chengxin Micro 20W PD chip solution

The main control of the Tamas 20W PD fast charging charger adopts the CX7527C, which is a high-performance multi-mode PWM flyback controller. This product facilitates users to design high-performance AC/DC conversion switching power supplies with fewer peripheral components and lower system costs. It provides extremely comprehensive and superior intelligent protection functions, including cycle by cycle overcurrent protection, overload protection, soft start, chip over temperature protection VDD undervoltage/overvoltage locking protection function.

The chip has the function of automatically identifying the size of the load and adjusting the working mode Under full or heavy load conditions, the chip operates at a fixed frequency of 65KHz. When the load is reduced the working frequency of the chip decreases, effectively reducing switch losses. When the load is under extremely light or empty load conditions, the chip is in interval mode.

CX7527C is equipped with intelligent frequency jitter technology to reduce electromagnetic interference and output ripple generated by the system in frequency reduction mode. Its unique working mode minimizes audio energy and eliminates audio noise. It adopts SOP-8 packaging, providing a good design platform for high cost performance flyback switching power supply systems that require ultra-low standby power consumption.

The secondary synchronous rectifier chip also comes from CX, model CX7538B. This is a high-performance switch power supply secondary side synchronous rectifier chip, which can easily meet level 6 energy efficiency in switch power supplies and is an ideal replacement for Schottky. The CX7538B supports a maximum switching frequency of 150KHz and is equipped with a 12m Ω low conductivity NMOS transistor, which generates much lower heat than Schottky diodes, significantly reducing temperature and improving conversion efficiency.

CX7538B supports the CCM/QR/DCM mode of switch mode power supply, which is very suitable for 3.3-12V fast charging synchronous rectification. It is equipped with a built-in 60V, 12m Ω synchronous rectification tube, which can provide 3A output, with a maximum improvement of 6% compared to Schottky efficiency. The working voltage range is wide, and the peripheral components are very simple. In wide voltage applications, only one capacitor is needed on the periphery.

The Tamas 20W PD fast charging charger adopts a "small block" design, thanks to the high integration and peripheral simplicity of the CX7527C+CX7538B fast charging solution. The charger supports QC and PD universal fast charging protocols, with a maximum output of 20W and a 1m long Lightning cable, which is very convenient for iPhone 12 users