NX2A4WP_SDS Datasheet, PDF (1/44 Pages) NXP Semiconductors – A4WP compliant high frequency wireless charging receiver A4WP compliant high frequency wireless charging receiver

NX2A4WP
A4WP compliant high frequency wireless charging receiver
front end
Rev. 3 — 4 August 2015
Product short data sheet
1. General description
The NX2A4WP is an A4WP (Alliance for Wireless Power) compliant wireless power
receiver front end. It contains a high-voltage, highly efficient rectifier, integrated LDOs, a
D3C-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 compatible 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 communication applications
 2 digital General Purpose Input and Output ports (GPIOs) with open-drain outputs and
25 V tolerance for control and communication applications
 Protection circuitry
 Automatic over-power protection
 Automatic AC short to ground for OVP option
 Automatic DC-to-DC over-voltage protection lock out option
 Over-temperature protection
 Over-voltage protection
 Under-voltage protection