TPS22945
- Input Voltage Range: 1.62 V to 5.5 V
- Low ON resistance
- rON = 0.4 Ω at VIN = 5.5 V
- rON = 0.5 Ω at VIN = 3.3 V
- rON = 0.6 Ω at VIN = 2.5 V
- rON = 0.8 Ω at VIN = 1.8 V
- Minimum Current Limit: 40 mA or 100 mA
- Undervoltage Lockout (UVLO)
- Thermal Shutdown
- Shutdown Current < 1 µA
- Fast Current Limit Response Time
- Fault Blanking
- Auto Restart
- 1.8-V Compatible Control Input Thresholds
- ESD Performance Tested Per JESD 22
- 4000-V Human-Body Model
(A114-B, Class II) - 1000-V Charged-Device Model (C101)
- 4000-V Human-Body Model
- Tiny SC-70 (DCK) Package
- UL Recognized Component (UL File 169910)
- Evaluated to IEC 60950-1, Ed 2, Am1, Annex CC,
Test Program 2 with CB Report
The TPS22941/2/3/4/5 load switches provide protection to systems and loads in high-current conditions. The devices contain a 0.4-Ω current-limited P-channel MOSFET that can operate over an input voltage range of 1.62 V to 5.5 V. Current is prevented from flowing when the MOSFET is off. The switch is controlled by an on/off input (ON), which is capable of interfacing directly with low-voltage control signals. The TPS22941/2/3/4/5 includes thermal shutdown protection that prevents damage to the device when a continuous over-current condition causes excessive heating by turning off the switch.
These devices provide an integrated, robust solution to provide current limiting the output current to a safe level by switching into a constant-current mode when the ouptut load exceeds the current-limit threshold. The OC logic output asserts low during overcurrent, undervoltage, or overtemperature conditions. These additional features make the TPS22941/2/3/4/5 an ideal solution for applications where current limiting is necessary.
This family of devices are available in a SC70-5 (DCK) package. It is characterized for operation over the free-air temperature range of –40°C to 85°C.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | TPS2294x Low-input-voltage Current-limited Load Switches With Shut Off And Auto-Restart Feature datasheet (Rev. D) | PDF | HTML | 2014/7/10 | ||
| 電子書 | 11 Ways to Protect Your Power Path | 2019/7/3 | ||||
| 應用說明 | Load Switch Thermal Considerations (Rev. A) | 2018/10/11 | ||||
| 應用說明 | Basics of Load Switches (Rev. A) | 2018/9/5 | ||||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 | ||||
| 技術文章 | How to use load switches and eFuses in your set-top box design | PDF | HTML | 2017/11/23 | |||
| 應用說明 | Selecting a Load Switch to Replace a Discrete Solution | 2017/4/30 | ||||
| 應用說明 | Timing of Load Switches | 2017/4/27 | ||||
| 應用說明 | Managing Inrush Current (Rev. A) | 2015/5/28 |
設計與開發
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TPS22945EVM-082 — TPS22945 評估模組
TPS22945EVM-082 評估模組 (EVM) 是經過完整組裝和測試的電路，用於評估 TPS22945 負載開關。與裝置的 VIN 和 VOUT 連線以及 PCB 佈局走線，提供進出待測裝置的低電阻路徑。測試點連線可讓 EVM 使用者利用使用者定義的測試條件來控制裝置，並進行準確的 RON 和時序量測。
PMP21065 — 適用於機上盒的超低待機功耗、高效率 DC-DC 電源參考設計
PMP21065 參考設計採用典型的 12VDC 輸入，產生目前機上盒中常見的多組共用電壓軌。此設計的主要目標為低成本、小尺寸與低待機功耗並兼具高效率，以協助客戶符合機上盒功耗方面的新法規準則。
TIDA-01451 — 適用於機上盒的電源開關參考設計
TIDA-01451 參考設計的功能可模擬機上盒的配電情況。透過使用整合式負載開關來控制電源軌，可視使用者的需求及喜好來開啟或關閉各電源軌。關閉未使用的電源軌可減少功率損耗，並有助於符合 Energy Star 等能源合規標準。置於輸入端的 eFuse 可管理熱插拔暫態，並防止下游 DC/DC 轉換器因輸入電壓過高或過低而受損，進而降低終端設備的返修率。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-SC70 (DCK) | 5 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。