A4WP Compliant High-Frequency Wireless Charging Receiver Frontend

NXXA4WP アーカイブス
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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.

製品詳細

Features

Key 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
  • 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

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