Preface
Wireless charging technology, also known as wireless energy transfer, is a technology that transmits energy through electromagnetic fields to charge electronic devices. It provides a convenient way to charge without a physical connection, and has been widely used in smartphones, watches, headphones, and some medical devices, among others.
Wireless charging is generally based on two main principles: electromagnetic induction and magnetic resonance. Electromagnetic induction uses electromagnetic mutual inductance between two coils to achieve energy transfer. When a changing magnetic field is generated by a charged coil (transmitter end), this magnetic field can induce a current in the other coil (receiver end) to transfer energy. Whereas, magnetic resonance relies on the resonant frequency between the transmitter and receiver, allowing for more efficient transmission of energy over a certain distance.
A complete wireless charging system mainly consists of a transmitter and a receiver, where the transmitter (Tx) contains a coil and control circuitry for generating a magnetic field. Whereas, the receiver (Rx) consists of a receiver coil and a receiver chip. The receiving coil is responsible for capturing the energy in the magnetic field, while the receiving chip manages and converts this energy to make it suitable for use in the device.
Core gravity wireless charging transmitter chip
The charging head network has obtained the three wireless charging transmitter chips launched by Core Gravity, and now summarizes the main models and related packaging characteristics into the following table.
The gravity of the Earth's core GWW6133
Core Gravity GWW6133 is a highly integrated wireless charging transmitter chip, which supports USB PD3.0, QC 2.0/3.0 fast charging protocol, conforms to WPC1.3 standard, can flexibly configure coils, supports operation in the input voltage range of 4.5V-20V, supports 5W/7.5W/10W/15W/20W five-level wireless power transmission, and has a typical efficiency of 85% at 10W output.
GWW6133 integrates a step-down switching regulator, a linear regulator, two half-bridge drivers, four power MOSFETs, and a 32-bit MCU processor that is highly programmable and consumes very little power, with less than 10uA of standby power. It also has an auto-wake function, which calculates the Q-factor in real time while the battery is on power. Thanks to its efficient drive and embedded low on-resistance MOSFETs, GWW6133 has excellent thermal performance.
GWW6133 allows the user to customize the LED lighting mode, adjust the buzzer, and set the FOD (Foreign Object Detection) threshold. Through the SWD or I²C serial communication interface, users can easily read critical information including voltage, current, frequency, and fault status. GWW6133 also includes built-in undervoltage lockout and temperature management circuitry to protect the device in the event of an anomaly.
Housed in a QFN34-5x5x0.75mm package and with an operating temperature range of -40ºC to +85ºC, the GWW6133 provides a comprehensive wireless power system solution when used with GWW1121A/B.
The gravity of the Earth's core GWW6117
GWW6117 is an efficient, Qi-compliant wireless charging transmitter chip, which supports WPC 1.3 EPP specification, can provide 15W wireless charging power, and supports QC2.0 / PD3.1 / SCP / AFC / UFCS and other fast charging protocols, which can be used for fast wireless charging for Apple, Samsung and other mobile phones to achieve a fast and efficient wireless charging experience.
GWW6117 supports operation over an input voltage range of 3.3V-14V, supports secure communication with wireless power receivers (ASKs), and features two I²C/UART ports that allow users to easily read critical information including voltage, current, frequency, and fault conditions and communicate with the rest of the device.
GWW6117 integrates voltage regulators, full-bridge drivers, ASK demodulators, foreign object detection (FOD), PWM modules, multi-channel analog-to-digital converters and other components, embedded digital processing cores, random access memory (RAM), multi-programmable memory (MTP) and read-only memory (ROM), supports dead time demodulation, supports sleep mode and standby mode, has overvoltage/overcurrent/overtemperature protection, is RoHS compliant, halogen-free, lead-free, and adopts QFN24 The 3x4mm package can be used over the -40°C to 105°C operating temperature range.
The gravity of the Earth's core GWW6025
GWW6025 is a highly integrated wireless power transmitter SoC that includes a 32-bit MCU microcontroller and asymmetric cryptographic core.
GWW6025 built-in 15mQ full-bridge controller and power MOSFET, it has the advantages of low heat generation and high energy efficiency. The built-in chip integrates complete voltage, current, temperature and other monitoring modules, FSK modulation, ASK decoders, self-protection devices and other wireless power transmitter special components. Support program hardware encryption and online upgrade.
GWW6025 FC-QFN25 4x4mm package is suitable for wireless chargers for watches and Bluetooth headsets.
Summary of the charging head network
Core Gravity's three wireless charging transmitter ICs GWW6133, GWW6117 and GWW6025 are highly efficient integrated solutions that support multiple fast charging protocols and comply with industry standards. GWW6133 provides up to 20W output, integrates buck regulator, MCU processor, and has high programmability and low standby power consumption. GWW6117 offers a 15W output, supports multiple communication ports and protection functions, and GWW6025 a built-in microcontroller and cryptographic algorithm core, making it suitable for wireless charging applications in small devices. These chips are housed in a compact package with a wide operating temperature range, making them suitable for wireless charging needs in a wide range of consumer electronics.