Hardware
2 hardware offerings
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Complementary Silicon or Component5W A11 wireless charger
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Complementary Silicon or Component18W Wireless Charger Power Bank
A4WP Compliant High-Frequency Wireless Charging Receiver Frontend
NXXA4WP Receive alerts
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 D1C-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.
Product Details
Features
- 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 target 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
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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
- Under-voltage lockout (for LDOs and DC-to-DC controller)
- Specified from -40 °C to +85 °C ambient temperature
- 3.56 mm x 3.41 mm WLCSP with 0.5 mm pitch
Target Applications
- Portable electronic devices with integrated wireless charging / wireless power RX capabilities according to the A4WP standard
Design Resources
Engineering Services
To get further assistance directly from NXP, please see our Engineering Services.
4 engineering services
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Independent Design House (IDH)
Embedded Software Design
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Independent Design House (IDH)
Hardware Design Services
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Independent Design House (IDH)
Wireless charger and Power management
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Independent Design House (IDH)
Wireless Charging Design
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