آر اف (فرکانس رادیویی) و بی‌سیم فرستندهٔ آر ‌اف

Product Attributes

Introduction

The NXQ1TXH5 is a controller and driver IC for a 5 V Qi-certified/compliant low-power wireless charger. It offers a fully integrated solution that includes a 5 V full-bridge power stage, as defined in Wireless Power Consortium (WPC) 5 V Qi standards A5, A11, A12 and A16. The NXQ1TXH5 uses a dedicated analog ping circuitry to detect devices. With the analog pin circuitry, an extremely low standby (wait state) power consumption is achieved. When a Qi-compliant receiver is placed, the NXQ1TXH5 starts to communicate with it. After the receiver is recognized, it safely initiates wireless power transfer from the transmitter to the receiver, while monitoring for fault conditions such as overheating or interference from metal objects. The device is optimized to operate from a 5 V USB power supply and uses Smart Power Limiting (SPL) to adjust the output power automatically to compensate for power-limited supplies. The device supports Foreign Object Detection (FOD). LED outputs and a buzzer output are available for the user interface. The LED outputs feature a number of blinking modes. Static Power Reduction (SPR) allows multiple NXQ1TXH5-based transmitters to operate from a single USB power supply by limiting power consumption per device. The NXQ1TXH5 is available in a 5 mm×5 mm, 32-pin HVQFN package.

Features

• Single-chip WPC 1.2 transmitter
• Operates from 5 V supply
• Low EMI radiation meeting EN55022 radiated and conducted emission limits
• Very few external components needed, minimizing cost and board space
• Extremely low-power receiver detection circuitry by integrating an analog ping circuit; standby (wait state) power 10 mW (typical)
• Power stage protected against overcurrents and overtemperature
• Dual-channel Amplitude Shift Keying (ASK) demodulation
• Demodulates communication packets from Qi-compliant receivers
• PID regulation for power drive and control
• Internal 1.8 V digital supply generation
• LED (×2) and buzzer outputs
• NTC input for external temperature check and protection
• On-chip thermal protection
• Small HVQFN 32-pin package (5 mm×5 mm) with 0.5 mm pitch
• FOD with WPC receiver versions 1.2 and 1.1 and for legacy receiver support (Qi version 1.0)
• Peak efficiency >75 %
• Excellent low power (<2 W) transfer efficiency. Ideal for charging wearables

Applications

• Wireless Power Consortium (WPC) Qi certified/compliant wireless power transmitters
• Wireless charger for (smart)phones, toys, shavers, pads, and other handheld devices
• High-efficiency low-power wireless charger for smartwatches and other wearables