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20V Wireless Charging Transmitter Full-bridge Power Chip CH275

Overview

CH275 is a full-bridge power chip with four built-in power switching tubes and current sampling module and wireless charging feedback signal amplifier module. The chip integrates over-current protection, over-temperature protection, over-voltage protection, under-voltage lockout and other modules, supports FOD foreign object detection, and has a built-in LDO regulator to provide 5V or 3.3V power supply for the MCU, with streamlined peripheral devices, which can be used for the transmitter side of the wireless charging or motor drive.

The following is the internal block diagram of CH275 for reference only. Block diagram

Features

  • Built-in 4 N-MOSFET power switching tubes, typical 20mΩ on-resistance.
  • Rated 2A continuous on-state current, supports 5A peak current.
  • Built-in low dropout bootstrap diode, peripheral only need capacitor.
  • Built-in Current-Sense current sampling and amplification circuit, supports FOD foreign object detection.
  • Built-in wireless charging feedback signal amplifier module ROP, supports MCU signal demodulation.
  • Built-in power tube over-current protection module OCP.
  • Built-in chip over-temperature protection module OTP.
  • Built-in power supply over-voltage protection module OVP and power supply under-voltage lockout module UVL.
  • Built-in LDO low dropout regulator, generates 5V and 3.3V for MCU simple power supply.
  • PWM input control signal level compatible with 5V, 3.3V and 2.5V voltage MCU or FPGA.
  • Integrated dead-time control, supports PWM up to 500KHz switching frequency.
  • Support 5V, 9V, 12V, 15V, 20V and other power supply voltages, high energy conversion efficiency.
  • Available in QFN14F and other packages.

Package

package

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relation files

file name file content
CH275DS1.PDF 20V wireless charging transmitter full-bridge power chip CH275 datasheet. CH275 has 4 built-in power switching tubes and current sampling module and signal amplification module, integrated with over-current protection OCP, over-temperature protection OTP, over-voltage protection OVP, etc., supports FOD foreign object detection, and has a built-in LDO voltage regulator to provide power for the MCU, which is used for wireless charging or motor drive.
CH211DS1.PDF Type-C/PD high-voltage interface chip CH211 datasheet, built-in 4-channel high-voltage switch and high-voltage LDO and boost module, integrated VBUS monitoring, over-voltage and over-temperature monitoring, support for N-type MOSFET power tube control, to provide SCL/SDA 2-wire interface for the PD signal high-voltage expansion of the MCU and docking high-voltage Type-C.
CH641DS0.PDF PD wireless charging MCU datasheet, CH641 is based on QingKe RISC-V core, 1-wire SDI, built-in PD PHY, BC interface, differential current sampling, motor PWM, single chip built-in 12V high-voltage IO driver MOS, supports typeC fast charging, provides overvoltage and overtemperature protection.
CH252DS1.PDF CH252 datasheet, CH252 is a USB Type-C cable E-Marker that supports USB Type-C 2.1 standard and USB PD 3.1 standard and can be used for various Type-C cable related applications.CH252 is shipped with a default configuration burned in and supports updating the configuration data of the finished cable via the Type-C interface. Each CH252 supports up to 5 updates of the configuration data in addition to the default configuration and has a data lock function.