REF68022
REF68022 - Reference Design
Ultra-compact, ultra-thin NFC wireless power supply (100 mW)
The ML7671RD3-EVK-001 is equipped with the ML7671 LSI on the transmitter side, while the ML7670RD3-EVK-001 incorporates the ML7670 LSI on the receiver side. By aligning the antennas, the system can charge a battery with a power transfer of 100 mW. This reference design enables wireless power transfer using an ultra‑compact, ultra‑thin PCB. Because it is built on an FPC substrate, it can also be integrated into curved enclosures such as smart rings.
Design Resources
Specifications
| Board Number | Input Voltage | Input Power | Operating Frequency | IF | Output Power | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ML7670RD3-EVK-001 | Generated from magnetic field | - | - | I2C | 100mW | ||||||||||
| ML7671RD3-EVK-001 | 5V | 400mW (TBD) | 13.56MHz | I2C | - |
Distribution Inventory
| Board Number | Distributor | Quantity Available |
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Key Components
| Board Number | Product Category | Part Number | Datasheet | Status | SPICE | LTspice® ? | Thermal Model | Symbol & Footprint | 3D STEP | Samacsys ECAD Library | Calc Tool | ROHM Solution Simulator |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ML7670RD3-EVK-001 | Wireless Power | ML7670-61XHB | - | Recommended | - | |||||||
| ML7670RD3-EVK-001 | Automotive MOSFETs | RV8L002SNHZG | - | Recommended | - | - | - | |||||
| ML7671RD3-EVK-001 | Current Detection Resistors | LTR10LEZPFL | - | Recommended | - | - | ||||||
| ML7671RD3-EVK-001 | Wireless Power | ML7671-61XGD | - | Recommended | - | |||||||
| ML7671RD3-EVK-001 | Schottky Barrier Diodes | RB532HS-30 | - | Active | - | - | - | - | ||||
| ML7671RD3-EVK-001 | 12 to 150V MOSFETs | RSF014N03 | - | Not Recommended for New Designs | - | - | - | - |