| Title of Reference Design | 5-Watt Wireless Charger | 15-Watt Wireless Charging Receiver | Wireless Battery Charger | Wireless Charging Transmitter | Wireless Charger for Wearable Applications |
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| Key Attractions | This reference design for a Wireless 5W Charging Transmitter offers a 70% efficiency rating. The design runs on 5V and is compatible with 2A phone chargers. The design includes foreign object detection (FOD) mechanisms for safe operation. The operating frequency ranges from 110kHz to 205kHz. | This reference design for a 15-Watt Buck Wireless Charging Receiver complies with the Wireless Power Consortium (WPC) and Medium Power Working Group (MPWG) specifications. The design converts 3.5-20V AC to 15W, giving 5V at 3A. | This reference design is for a wireless battery charger optimised for efficient 1-watt wireless power transfer. The design features Qi 1.0 standard and is specifically designed for wearable devices and IoT applications. | This reference design for a wireless charging transmitter features Qi standard. The design operates at 5V and within a temperature range of -10°C to 45°C. The maximum charging current is 800mA, and the maximum output power is 4W. | This reference design for a wireless charger follows Wireless Power Consortium (WPC) standards and is Qi certified. The design can handle charging current in the range of 10mA to 250mA. The design boasts a maximum leakage current of 75nA from 0°C to 125°C. |
| Highlights | The AN4880 from Microchip is a reference design for a 5W wireless charging transmitter. The system boasts an overall efficiency exceeding 70%, supports Li-ion charging algorithm, customisable for different chemistries… [content trimmed for brevity] | WPR1500-BUCK is a reference design for a 15-watt buck wireless charging receiver from NXP… [content trimmed for brevity] | The STEVAL-ISB038V1 is a reference design by STMicroelectronics… [content trimmed for brevity] | The RL78/G11 from Renesas is a reference design for a wireless charging transmitter… [content trimmed for brevity] | The TIDA-00318 is a wireless charger from Texas Instruments (TI)… [content trimmed for brevity] |
| Applications | The reference design is suitable for phone chargers, Qi enabled devices, etc. | The reference design is suitable for various applications such as smartphone chargers, wearable devices, IoT devices, medical devices, etc. | The reference design is suitable for wearable gear, smartwatches, Internet of Things (IoT) sensors, and healthcare devices. | The reference design is suitable for creating smartphone chargers, automotive applications, etc. | The reference design is suitable for low-power wearable devices. The design is optimised for applications requiring a charge current of 135mA. It can be used in various industrial applications like in a position sensor, etc. |
| OEM Brand | Microchip | NXP | STMicroelectronics | Renesas | Texas Instruments (TI) |
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The author, Nidhi Agarwal, works as a Technology Journalist at EFY
