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NXP Semiconductors - A4WP compliant high frequency wireless charging receiver front end

Numéro de référence NX1A4WP
Description A4WP compliant high frequency wireless charging receiver front end
Fabricant NXP Semiconductors 
Logo NXP Semiconductors 





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NX1A4WP fiche technique
NX1A4WP
A4WP compliant 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) compliant 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 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

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