TPS3840
- Wide operating voltage: 1.5V to 10V
- Nano supply current: 300nA (typical), 700nA (maximum)
- Fixed threshold voltage (VIT-)
- Threshold from 1.6V to 4.9V in 0.1V steps
- High accuracy: 1% (typical), 1.5% (maximum)
- Built-in hysteresis (VIT+)
- 1.6V ≤ VIT- ≤ 3.0V = 100mV (typical)
- 3.1V ≤ VIT- ≤ 4.9V = 200mV (typical)
- Start-up delay (tSTRT): 220µs (typical), 350µs (maximum)
- Programmable reset time delay (tD):
- 50µs (no capacitor) to 6.2s (10µF)
- Active-low manual reset (MR)
- Three output topologies:
- TPS3840DL: open-drain, active-low (RESET), requires pull-up resistor
- TPS3840PL: push-pull, active-low (RESET)
- TPS3840PH: push-pull, active-high (RESET)
- Wide temperature range: –40°C to +125°C
- Package: SOT23-5 (DBV)
Wide Vin allows monitoring 9V rails or batteries without external components and 24V rails with external resistors. Nano-Iq extends battery life for low power applications and minimizes current consumption when using external resistors. Fast start-up delay allows the detection of a voltage fault before the rest of the system powers up providing maximum safety in hazardous start-up fault conditions. Low Power-on-Reset (VPOR) prevents false resets, premature enable or turn-on of next device, and proper transistor control during power-up and power-down.
Reset output signal is asserted when the voltage at VDD drops below the negative voltage threshold (VIT-) or when manual reset ( MR) is pulled to a low logic (VMR_L). Reset signal is cleared when VDD rise above VIT- plus hysteresis (VIT+) and manual reset is floating or above VMR_H and the reset time delay (tD) expires. Reset time delay can be programmed by connecting a capacitor between CT pin and ground. For a fast reset CT pin can be left floating.
Additional features: Built-in glitch immunity protection for MR and VDD, built-in hysteresis, low open-drain output leakage current (ILKG(OD)).
技術文件
設計與開發
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TPS3840EVM — TPS3840 奈米功率高輸入電壓監控器評估模組
TPS3840 評估模組 (EVM) 是用於評估 TPS3840 裝置的平台,該產品為具備手動重設和可編程重設延遲功能的奈米功率電壓監控器。TPS3840 提供高達 10V 的工作電壓,除了精確度達 1%(一般)外,同時維持 350nA(一般)的超低靜態電流。TPS3840EVM 一共支援三種裝置輸出拓撲。如需詳細資訊,請參閱 TPS3840 產品規格表。
TIDA-010036 — 使用獨立 ADC 的一相分流電錶參考設計
TIDA-010037 — 使用獨立 ADC 的高準確度分相 CT 電錶參考設計
TIDA-010041 — 用作比較器或電源序列器的奈米功率、寬 VIN (最大 12 V) 監控器參考設計
TIDA-010055 — 非隔離電源架構,具有用於保護繼電器模組的診斷參考設計
TIDA-010243 — 具備獨立 ADC 的三相比流器電表參考設計
此參考設計利用高效能、多通道類比轉數位轉換器 (ADC) 實作 0.1 級三相能源量測,其會在 8 kHz 時對比流器 (CT) 取樣,以量測 AC 主電源各腳的電流與電壓。此參考設計可在 0.01A 至 100A 的廣泛輸入電流範圍中實現高準確度,並支援如獨立諧波分析等電源品質功能所需的高取樣頻率。使用 TI Arm® Cortex®-M0+ 主機微控制器進行測量時,即可實現 32kSPS 的 ADC 取樣率。必要的軟體功能已內建於 MSPM0-SDK 中,並可使用 Code Composer Studio™ 進行編譯。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |