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  1. Luke11

    Will an over‑discharged "dead" battery be woken up by NFC wireless charging?

    My apologies for the earlier misstatement. The battery is not at 0 V. The receiver enters a "0 V" output‑protection state when depleted, while the circuit maintains proper battery protection. The NFC‑WLC can still power up the receiver, re‑activate the battery and start charging.
  2. Luke11

    Will an over‑discharged "dead" battery be woken up by NFC wireless charging?

    When lithium‑ion batteries are deeply discharged, even down to 0 V, many charging solutions have an under‑voltage startup threshold. A battery over‑discharged to 0 V can no longer be recharged with those solutions. However, the NFC‑WLC protocol supports trickle pre‑charging. Even when the...
  3. Luke11

    Have you encountered space-constraint issues in your latest wearable device projects?

    Thanks for your suggestions. Applying these into our subsequent projects will take some time.
  4. Luke11

    Have you encountered space-constraint issues in your latest wearable device projects?

    Yes, we are using the ST25R3916B for our NFC‑WLC charging dock. Currently we are looking for a small‑form‑factor NFC IC to build a demo board for the receiver side of compact devices.
  5. Luke11

    Have you encountered space-constraint issues in your latest wearable device projects?

    When your PCB real estate is extremely tight, leaving no room even for a conventional USB port. Beyond the main MCU solution, you also need to account for the PCB footprint occupied by the charging management chip. How do we deliver power for compact wearable devices under these conditions...
  6. Luke11

    Can devices be charged without a charging port?

    Can wearable devices operate and get charged with no physical charging port? When talking about port-free charging, Qi wireless charging may be your first thought. However, compact wearables such as smart rings and miniature TWS earbuds have long faced constraints. Limited internal PCB space...
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