NXP Semiconductors MWCT1101CLH

Overview

MWCT1101CLH from NXP Semiconductors (formerly Freescale) is a WPC Qi-compliant wireless power transmitter controller IC designed for low-power consumer charging systems. It integrates digital demodulation, foreign object detection (FOD), over-voltage/current/temperature protection, and supports frequency/duty-cycle/rail-voltage/phase-shift control modes. It operates from 4.2 V to 19 V DC input and delivers up to 5 W output in Qi A/B-type transmitter designs.

For engineers reviewing the MWCT1101CLH datasheet, MWCT1101CLH pinout, MWCT1101CLH application, or MWCT1101CLH equivalent, this device is selected for its integrated FOD logic, ultra-low standby power via touch-sensing wake-up, multi-interface support (CAN/I²C/SCI/SPI), and software-configurable control architecture enabling rapid differentiation in compact wireless charging transmitters.

Technical Context

The MWCT1101CLH implements a mixed-signal SoC architecture with an ARM Cortex-M0+ core, integrated 12-bit cyclic ADC, dual DACs (12-bit + six 6-bit), eFlexPWM, QSPI, and analog comparators. Its digital demodulation engine processes receiver communication packets without external demodulator ICs, reducing BOM count and PCB area.

It supports three low-power modes-LPRUN, LPWAIT, and VLPRUN-with typical active current as low as 2.8 mA at 2 MHz and sub-1 mA in VLPRUN mode (200 kHz). FOD is implemented via real-time impedance monitoring using ADC sampling and proprietary algorithm execution on-chip.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level MSL-3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MWCT1101CLH, STWLC38 offers higher integration but less control flexibility, while MP-A21 reduces software complexity at the expense of added external components and lower configurability - MWCT1101CLH uniquely balances programmability, peripheral richness, and system-level optimization for differentiated Qi transmitter designs.

Availability

MWCT1101CLH is available at Aetrix Electronics and suitable for smartphone charging pads, wireless earbud cases, smartwatch chargers, USB-C multi-device docks, and compact Qi-compliant transmitter modules requiring stable component supply and long-term lifecycle support.

Supply support for MWCT1101CLH 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 markets.

The MWCT1101CLH belongs to NXP's Wireless Charging portfolio, engineered specifically for WPC Qi-compliant low-power transmitter applications demanding high integration, ultra-low standby consumption, and software-defined control flexibility.

FAQ

What is the primary function of the MWCT1101CLH in a wireless charging system?

The MWCT1101CLH serves as the central controller for WPC Qi-compliant low-power wireless power transmitters. It manages power stage modulation (via frequency, duty cycle, rail voltage, or phase shift), performs real-time digital demodulation of receiver communication, executes Foreign Object Detection using ADC-based impedance analysis, and enforces over-voltage/current/temperature protections. The MWCT1101CLH integrates all essential functions to replace discrete control logic and external demodulators in 5 W transmitter designs.

Does the MWCT1101CLH require an external crystal oscillator?

Yes, the MWCT1101CLH requires an external crystal (4–16 MHz) connected to XTAL/EXTAL pins for precise timing of demodulation, FOD sampling, and PWM generation. While it includes internal relaxation oscillators (8 MHz and 200 kHz), these are not accurate enough for Qi-compliant packet timing or high-fidelity impedance measurement - the external crystal ensures ±50 ppm stability required by WPC specifications. The MWCT1101CLH datasheet specifies crystal load capacitance and drive level requirements to guarantee reliable startup and jitter performance.

How does the MWCT1101CLH achieve ultra-low standby power?

The MWCT1101CLH achieves ultra-low standby power (<100 µW system-level) through Freescale Touch technology: it periodically wakes its integrated capacitive sensing circuitry (not the full CPU) to detect mobile device placement, then transitions fully to RUN mode only upon valid presence detection. In VLPRUN mode, core clock drops to 200 kHz, regulators enter standby, and only COP and essential clocks remain active - drawing just 0.7 mA. This architecture avoids continuous RF polling or always-on analog comparators. The MWCT1101CLH implements this behavior in firmware with configurable wake interval and sensitivity thresholds.

Which communication interfaces does the MWCT1101CLH support for host MCU interaction?

The MWCT1101CLH supports CAN, I²C, SCI (UART), and SPI interfaces for host MCU communication. I²C is typically used for configuration and status readback; SCI provides human-readable debug logs and firmware updates; SPI enables high-speed telemetry streaming; CAN supports integration into automotive or industrial systems with existing CAN bus infrastructure. All interfaces operate concurrently - for example, I²C can configure parameters while SCI streams real-time FOD metrics. The MWCT1101CLH includes dedicated register maps and interrupt flags for each peripheral, allowing deterministic response timing in time-critical transmitter control loops.

Can the MWCT1101CLH be used in Qi v1.3 or newer transmitter designs?

The MWCT1101CLH was validated and documented for WPC Qi v1.2 compliance per its official datasheet (Rev. 1.0, 02/2014). While its digital demodulation engine and FOD algorithm meet foundational Qi requirements, it does not implement v1.3-specific features such as Extended Power Profile (EPP) negotiation, authentication certificate handling, or 15 W power control logic. Therefore, the MWCT1101CLH is suitable for legacy Qi Baseline Power Profile (BPP) 5 W applications but not certified for v1.3 EPP or newer versions. For new designs targeting Qi v1.3+, NXP recommends the newer MWCT1200 series. The MWCT1101CLH remains fully functional and supported for BPP-compliant products.