Wearable devices require advanced power management to achieve long battery run times with always-on functionality. Additionally, the devices need to use small rechargeable batteries and enable small footprint designs. This application note shows the implementation of a scalable power management solution for wearables that can be tailored for activity monitors or smart watches. The design provides a wireless charging input, highly configurable battery management solution with Li-Ion battery charger and low quiescent current (Iq) DC/DC buck, boost converter for PMOLED display, boost converter for Heart Rate Monitor (HRM), and second configurable low Iq DC/DC buck.
| 輸出電壓選項 | PMP11311.1 | PMP11311.2 | PMP11311.3 | PMP11311.4 | PMP11311.5 |
|---|---|---|---|---|---|
| Vin (最小值) (V) | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 |
| Vin (最大值) (V) | 20 | 20 | 20 | 20 | 20 |
| Vout (Nom) (V) | 4.2 | 1.8 | 1.8 | 5 | 12 |
| Iout (最大) (A) | .3 | .3 | .3 | .3 | .1 |
| 輸出功率 (W) | 1.26 | .54 | .54 | 1.5 | 1.2 |
| 隔離式/非隔離式 | Non-Isolated | Non-Isolated | Non-Isolated | Non-Isolated | Non-Isolated |
| 輸入類型 | DC | DC | DC | DC | DC |
| 拓撲結構 | Linear Regulator | Buck- Synchronous | Buck- Synchronous | Boost- Synchronous | Boost- Synchronous |
已開發完全組裝的電路板，僅供測試與性能驗證，且為非賣品。
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| 類型 | 標題 | 下載最新的英文版本 | 日期 | |||
|---|---|---|---|---|---|---|
| * | 測試報告 | Power Management Reference Design for a Wearable Device with Wireless Charging (Rev. A) | PDF | HTML | 2016/4/14 | ||
| 更多文件說明 | Adapting Qi-compliant wireless-power solutions to low-power wearable products | 2014/6/6 | ||||
| 類比設計期刊 | Accurately measuring efficiency of ultralow-IQ devices | 2014/1/22 | ||||
| 類比設計期刊 | High-efficiency, low-ripple DCS-Control offers seamless PWM/pwr-save transitions | 2013/7/25 |