KRECO Qi2.0 MPP standard magnetic wireless charging module is a wireless charging product that meets the Qi2.0 certification standard.
It uses a panel composed of USB-C input line, circular PCB board, wireless charging coil, and magnet ring, which has magnetic connection, faster charging speed, higher efficiency, and greater convenience.
Appearance Analysis:
The magnetic wireless charging module consists of USB-C input line, circular PCB board, wireless charging coil, and magnet ring. It uses a USB-C line for power supply, which can be well adapted to various brands of fast chargers on the market, with a full PIN design of the USB-C male head. The measured cable length is about 109cm. The measured diameter of the PCB board is 44.3mm, and the maximum thickness is 5.09mm. The magnetic wireless charging coil has a magnetic circle diameter of 55mm and a thickness of 4.9mm. The overall weight of the module is about 48g. Using the EESON RX full-function test module 3 generation for testing, the results show that the power is 15W and the frequency is 360kHz, and the MPP function is normal.
Functional Analysis:
Looking at the front of the MPP wireless charging module PCBA, the power supply lead and wireless charging coil are soldered on the front of the PCB. The PCB is a single-sided layout, with no components soldered on the back, making it easy to assemble into module products. On the left side of the front of the PCB are the boost circuit and encryption IC; in the middle is the wireless charging main control; on the right side are the resonant capacitor, switching MOSFET, and wireless charging power bridge. The wireless charging main control is KRECO's customized Meixinsheng chip MT5815, which has a wide input voltage range of 3.8V to 30V that meets the WPC Qi specification V2.0 standard, and supports an embedded 32-bit ARM M0® processor with proprietary protocol. It has a QEC-100 certified 64KB e-Flash and 4KB SRAM, supports QC2.0/QC3.0, FCP/SCP, and USB PD fast charge power adapters. At the same time, it integrates three pairs of N-MOSFET drivers, precise low-side current sensing function for FOD and current mode demodulation, two high-performance PWM generation modules, each with six channels of PWM output, all with programmable dead-time control integrated 32kHz oscillator integrated for standby power monitoring and wake-up Watchdog support for 8MHz ~ 24MHz XTAL built-in 10-bit ADC for voltage, current, and temperature measurement.
On the left side of the silk screen is AP15P03Q reserved as P_MOPS for boost circuit enable control. To the right is an integrally formed power inductor marked as 4R7; next to it are two N_MOS marked as 20N03 that work with the MCU main control to drive the boost circuit. Next to it is an integrally formed dual N_MOS m
Marked as 6254 that is mainly used for switching resonant capacitors. Below them are respectively 1206 resonant capacitors. The security chip comes from Shanghai Fudan Microelectronics, model number FM1230, supporting DES/TDES, AES, SM4 symmetric algorithms, RSA, ECC, SM2 asymmetric algorithms and SHA1, SHA224, SHA256, SM3 hashing algorithms and other security algorithms, with multiple protection capabilities, supporting symmetric and asymmetric encryption and decryption operations, secure storage, identity authentication and other applications, can be used for contact ESAM/PSAM modules, SE security module and other application fields.
Fudan Microelectronics FM123x provides SOP8、DFN12、DFN8、WLCSP8 packaging to meet different system applications. Silk screen YXC 16.000 is the main control chip crystal oscillator, providing accurate clock frequency for the main control MCU. Silk screen 8721 uses one operational amplifier for signal processing of demodulation circuits. Silk screen 8051 uses one operational amplifier for signal processing of demodulation circuits. Silk screen 3622DE uses two models of identical dual N_MOSFET wireless charging switches. The wireless charging coil uses a potted ferrite core. Magnetic adsorption magnet special effect