ZHCSNR4B May 2021 – April 2022 TPS25946
PRODUCTION DATA
- 1 特性
- 2 應用
- 3 說明
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Undervoltage Lockout (UVLO and UVP)
- 8.3.2 Overvoltage Lockout (OVLO)
- 8.3.3 Inrush Current, Overcurrent, and Short-Circuit Protection
- 8.3.4 Analog Load Current Monitor
- 8.3.5 Reverse Current Protection
- 8.3.6 Overtemperature Protection (OTP)
- 8.3.7 Fault Response and Indication (FLT)
- 8.3.8 Power Good Indication (PG)
- 8.3.9 Input Supply Good Indication (SPLYGD)
- 8.4 Device Functional Modes
-
9 Application and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1 Design Requirements
- 9.2.2
Detailed Design Procedure
- 9.2.2.1 Device Selection
- 9.2.2.2 Setting Overvoltage Threshold
- 9.2.2.3 Setting Output Voltage Rise Time (tR)
- 9.2.2.4 Setting Power Good Assertion Threshold
- 9.2.2.5 Setting Overcurrent Threshold (ILIM)
- 9.2.2.6 Setting Overcurrent Blanking Interval (tITIMER)
- 9.2.2.7 Selecting External Bias Resistor (R5)
- 9.2.2.8 Selecting External Diode (D1)
- 9.2.3 Application Curve
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
3 說明
TPS25946xx 系列電子保險絲是采用小型封裝的高度集成電路保護和電源管理解決方案。此類器件只需很少的外部元件即可提供多種保護模式，能夠非常有效地抵御過載、短路、電壓浪涌和過多浪涌電流。借助集成的背對背 FET，該器件允許在 ON 狀態期間雙向電流流動，同時在 OFF 狀態期間阻止雙向電流流動，使其非常適合 USB OTG (On-The-Go) 應用。
可以使用單個外部電容器來調節輸出壓擺率和浪涌電流。通過在輸入超過可調過壓閾值時切斷輸出，可以保護負載免受輸入過壓情況的影響。此類器件通過主動限制電流來響應輸出過載。用戶可以調節輸出電流限制閾值以及瞬態過流消隱計時器。電流限制控制引腳還用作模擬負載電流監控器。
器件采用 2mm × 2mm 10 引腳 HotRod QFN 封裝，旨在改善熱性能并減小系統尺寸。
這些器件的額定工作結溫范圍為 -40°C 至 +125°C。
器件信息
| 器件型號 | 封裝(1) | 封裝尺寸（標稱值） |
|---|---|---|
| TPS25946xxRPW | QFN (10) | 2mm × 2mm |
(1) 如需了解所有可用封裝，請參閱數據表末尾的可訂購產品附錄。
簡化版原理圖