ZHCS360F July 2012 – November 2020 TPS54020
PRODUCTION DATA
- 1 特性
- 2 應(yīng)用
- 3 說(shuō)明
- 4 Revision History
- 5 Description (Continued)
- 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 Fixed Frequency PWM Control
- 8.3.2 Input Voltage and Power Input Voltage Pins (VIN and PVIN)
- 8.3.3 Voltage Reference (VREF)
- 8.3.4 Adjusting the Output Voltage
- 8.3.5 Safe Start-up into Prebiased Outputs
- 8.3.6 Error Amplifier
- 8.3.7 Slope Compensation
- 8.3.8 Enable and Adjusting Undervoltage Lockout
- 8.3.9 Adjustable Switching Frequency and Synchronization (RT/CLK)
- 8.3.10 Soft-Start (SS) Sequence
- 8.3.11 Power Good (PWRGD)
- 8.3.12 Bootstrap Voltage (BOOT) and Low Dropout Operation
- 8.3.13 Sequencing (SS)
- 8.3.14 Output Overvoltage Protection (OVP)
- 8.3.15 Overcurrent Protection
- 8.3.16 Thermal Shutdown
- 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 Custom Design With WEBENCH? Tools
- 9.2.2.2 Operating Frequency
- 9.2.2.3 Output Inductor Selection
- 9.2.2.4 Output Capacitor Selection
- 9.2.2.5 Input Capacitor Selection
- 9.2.2.6 Soft-Start Capacitor Selection
- 9.2.2.7 Bootstrap Capacitor Selection
- 9.2.2.8 Undervoltage Lockout Set Point
- 9.2.2.9 Output Voltage Feedback Resistor Selection
- 9.2.2.10 Compensation Component Selection
- 9.2.3 Application Curves
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RUW|15
散熱焊盤(pán)機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RUW|15
訂購(gòu)信息
3 說(shuō)明
TPS54020 是一款 10A、4.5V 到 17V 輸入 SWIFT 轉(zhuǎn)換器。該器件采用創(chuàng)新型 3.5mm × 3.5mm HotRod 封裝，能夠優(yōu)化高密度降壓設(shè)計(jì)。TPS54020 是一款功能全面的轉(zhuǎn)換器。
通過(guò)高側(cè)和低側(cè) MOSFET 的創(chuàng)新集成和封裝實(shí)現(xiàn)了高效率。TPS54020 可在較高的負(fù)載條件下保持持續(xù)電流模式 (CCM) 運(yùn)行，并能夠在跳過(guò)脈沖時(shí)切換到 Eco 模式以提升輕載效率。
兩個(gè) MOSFET 上的電流限制提供器件和系統(tǒng)的保護(hù)。高側(cè) MOSFET 內(nèi)的逐周期電流限制在過(guò)載情況下提供保護(hù)。低側(cè) MOSFET 零電流檢測(cè)在輕負(fù)載運(yùn)行時(shí)關(guān)閉低側(cè) MOSFET。共有三種限流閾值可供選擇，能夠適用于多種應(yīng)用。也可選擇一個(gè)斷續(xù)或逐周期過(guò)流保護(hù)機(jī)制。
當(dāng)芯片溫度超過(guò)熱關(guān)斷觸發(fā)點(diǎn)時(shí)，熱關(guān)斷保護(hù)禁用開(kāi)關(guān)，而在內(nèi)置熱滯后和關(guān)斷斷續(xù)時(shí)間后啟用開(kāi)關(guān)。
器件信息
| 器件型號(hào) | 封裝(1) | 封裝尺寸（標(biāo)稱(chēng)值） |
|---|---|---|
| TPS54020 | VQFN (15) | 3.50mm x 3.50mm |
(1) 如需了解所有可用封裝，請(qǐng)見(jiàn)數(shù)據(jù)表末尾的可訂購(gòu)產(chǎn)品附錄。
簡(jiǎn)化版應(yīng)用電路原理圖
效率與負(fù)載電流間的關(guān)系