NXP Semiconductors NX1WP10Z

Overview

NX1WP10Z from NXP Semiconductors is an A4WP-compliant high-frequency wireless power receiver front end IC integrating a 6.78 MHz active rectifier (20 V max input), dual LDOs (1.8 V/3.3 V, 50 mA), a programmable buck DC-DC converter (4.2–10 V, 1.1 A), a 12-bit multi-channel ADC, four GPIOs, and a 400 kHz Fast-Mode I²C interface - designed for compact, efficient charging of portable devices via PMU or charging controllers.

For engineers reviewing the NX1WP10Z datasheet, NX1WP10Z pinout, NX1WP10Z application, or NX1WP10Z equivalent, key selection considerations include its 86% AC-to-DC efficiency at 6–9 W, automatic antenna detuning for thermal safety, 25 V-tolerant antenna inputs, and WLCSP-25 package compatibility with space-constrained wireless charging receivers.

Technical Context

The NX1WP10Z implements a fully integrated analog front end for 6.78 MHz magnetic resonance wireless power reception. Its active rectifier operates up to 20 V with automatic clamping and detuning, while the buck regulator delivers adjustable output from 4.2 V to 10 V at up to 1.1 A DC current. The on-chip 12-bit ADC monitors rectifier voltage, current, junction temperature, and external NTC sensors.

Control is handled via a dedicated digital controller configured over I²C, supporting software/power-on reset and programmable rectifier modes (active/half-active/passive). Safety functions-including over-temperature, over-voltage, under-voltage lockout, and automatic AC short-to-ground-are implemented using low-power analog comparators.

Key Specifications

Pinout & Package

Package: 25-ball Wafer-Level Chip-Scale Package (WLCSP), 0.5 mm pitch, 3.56 × 3.41 mm footprint, bottom-side solder balls.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar wireless power receiver applications.

Compared with MP-A21 and BQ51222, the NX1WP10Z uniquely combines A4WP compliance, on-die 12-bit ADC with NTC support, auto-enable LDOs, and 25 V antenna tolerance - making it the only option for compact, thermally aware 6.78 MHz receivers requiring minimal external components.

Availability

NX1WP10Z is available at Aetrix Electronics and suitable for smart earbuds charging cases, wireless charging pad receiver modules, and portable medical sensor hubs requiring stable component supply, full lifecycle traceability, and industrial temperature range support.

Supply support for NX1WP10Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The NX1WP10Z belongs to NXP's high-frequency wireless power product line, engineered specifically for A4WP-compliant 6.78 MHz magnetic resonance charging systems in space- and efficiency-constrained portable electronics.

FAQ

What wireless charging standard does the NX1WP10Z support?

The NX1WP10Z supports the A4WP (Alliance for Wireless Power) standard operating at 6.78 MHz. It is explicitly designed for magnetic resonance-based wireless power transfer and is not compatible with Qi (110–205 kHz) or PMA standards. The NX1WP10Z integrates all necessary analog and digital functions - including active rectification, regulation, and safety monitoring - to serve as a complete front-end solution in A4WP-certified receivers.

Does the NX1WP10Z include built-in protection features?

Yes, the NX1WP10Z includes multiple hardware-level protection features: automatic antenna detuning for over-temperature, automatic AC short-to-ground for over-voltage protection, DC-to-DC over-voltage lockout, over-temperature protection, over-voltage protection, under-voltage protection, and under-voltage lockout for both LDOs and the DC-DC controller. These functions are implemented using low-power analog comparators - ensuring response without firmware dependency - and are confirmed in the official NXP short data sheet NX1WP10_SDS.

What is the maximum output current and voltage range of the integrated DC-DC converter in the NX1WP10Z?

The integrated buck DC-DC converter in the NX1WP10Z delivers an adjustable output voltage from 4.2 V to 10 V with a maximum continuous DC output current of 1.1 A. This range supports direct charging of single-cell and dual-cell Li-ion/Li-poly batteries, as well as interfacing with external PMUs. The output is programmable via I²C registers, and regulation stability is maintained across the full −40 °C to +85 °C operating temperature range.

Can the NX1WP10Z measure external temperature using an NTC thermistor?

Yes, the NX1WP10Z provides a dedicated analog interface for external NTC thermistors, supported by its integrated 12-bit multi-channel ADC. The ADC includes internal biasing circuitry, allowing direct connection of an NTC without external resistors or op-amps. Temperature measurements are accessible via I²C, enabling real-time thermal management in applications such as earbud charging cases where enclosure temperature must remain within safe limits.

What package type and dimensions does the NX1WP10Z use?

The NX1WP10Z uses a 25-ball Wafer-Level Chip-Scale Package (WLCSP) with a 0.5 mm ball pitch and overall dimensions of 3.56 mm × 3.41 mm. This ultra-compact package is optimized for space-constrained designs like TWS earbud charging cases and wearable medical sensors. The WLCSP construction supports fine-pitch routing and minimal PCB area usage, and the device is rated for reflow soldering per JEDEC J-STD-020.