NX1A4WP Datasheet Text
NX1A4WP
A4WP pliant high frequency wireless charging receiver front end
Rev. 2
- 4 August 2015
Product short data sheet
1. General description
The NX1A4WP is an A4WP (Alliance for Wireless Power) pliant wireless power receiver front end. It contains a high-voltage, highly efficient rectifier, integrated LDOs, a D2C-to-DC converter, a multi-channel 12-bit ADC, four GPIOs and a Fast-Mode I2C-bus interface. The integrated rectifier supports voltages of up to 20 V and is protected by an integrated automatic clamping function and an automatic over-power protection function. The DC-to-DC regulator delivers a nominal voltage of 5 V. The host microcontroller configures the on-chip controller for automatic interrupt-driven system control. The controller reads the rectifier output voltage, current level information, junction temperature and external temperature sensor information from the ADC. It controls the DC-to-DC converter as well as the GPIOs.
2. Features and benefits
- 25 V tolerant antenna input pins
- Automatic over-voltage protection of the antenna inputs
- 6.78 MHz patible integrated rectifier
- High efficiency with an active rectifier and a DC-to-DC converter
- Integrated LDOs (1.8 V and 3.3 V up to 100 mA) with auto enable and discharge path
- Integrated DC-to-DC buck regulator with 5 V, 1.2 A output
- Multi-channel 12-bit ADC subsystem
- Temperature sensor (NTC) analog interface
- USB bus power supply detection
- 400 kHz I2C-bus slave interface
- Software and power-on reset of the on-chip digital controller
- Programmable rectifier modes: active, half-active and passive
- 2 digital General Purpose Input and Output ports (GPIOs) with open-drain outputs and up to 60 V tolerance for control and munication applications
- 2 digital General Purpose Input...