NX1WP10Z

NX1WP10Z 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 AC input to DC-to-DC output efficiency exceeding 86 % at 6 to 9 W output Integrated LDOs (1.8 V and 3.3 V up to 50 mA) with auto enable and discharge path Integrated DC-to-DC buck regulator with 4.2 V to 10 V, 1.1 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 andup to 60 V tolerance for control and communication applications

NX1WP10Z 1. General description

The NX1WP10 is an A4WP (Alliance for Wireless Power) compliant wireless powerreceiver front end. It contains a high-voltage, highly efficient active rectifier, integratedLDOs, a DC-to-DC converter, a multi-channel 12-bit ADC, four GPIOs and a Fast-ModeI2C-bus interface. The integrated rectifier supports voltages of up to 20 V and is protectedby an integrated automatic clamping function and an automatic detuning function. TheDC-to-DC regulator delivers an adjustable output voltage between 4.2 V and 10 V with amaximum DC current of up to 1.1 A. It is used to charge portable devices through a PMUor a charging controller. The integrated LDOs are directly linked to the rectifier output.They are automatically enabled once a sufficient voltage level at the output of the rectifieris reached. These voltages are used to supply the corresponding wireless power receivercontroller and BT-LE transceiver. The host microcontroller configures the on-chipcontroller for automatic interrupt-driven system control.The microcontroller can measure the rectifier output voltage, current level information,junction temperature and external temperature sensor information with the ADC. Itcontrols the DC-to-DC converter as well as the GPIOs. Key safety functions areimplemented with low power analog comparators. For example, one of the selectablesafety functions prevents the junction temperature from exceeding its limits byautomatically detuning the antenna. The overall system efficiency from the antenna inputto the DC-to-DC output reaches 86 %.