ZHCSPP3 July 2022 TPS563300
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Fixed Frequency Peak Current Mode
- 7.3.2 Pulse Frequency Modulation
- 7.3.3 Voltage Reference
- 7.3.4 Output Voltage Setting
- 7.3.5 Enable and Adjusting Undervoltage Lockout
- 7.3.6 Minimum On Time, Minimum Off Time, and Frequency Foldback
- 7.3.7 Frequency Spread Spectrum
- 7.3.8 Overvoltage Protection
- 7.3.9 Overcurrent and Undervoltage Protection
- 7.3.10 Thermal Shutdown
- 7.4 Device Functional Modes
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Application
- 8.2.1 Design Requirements
- 8.2.2
Detailed Design Procedure
- 8.2.2.1 Custom Design With WEBENCH® Tools
- 8.2.2.2 Output Voltage Resistors Selection
- 8.2.2.3 Bootstrap Capacitor Selection
- 8.2.2.4 Undervoltage Lockout Set Point
- 8.2.2.5 Output Inductor Selection
- 8.2.2.6 Output Capacitor Selection
- 8.2.2.7 Input Capacitor Selection
- 8.2.2.8 Feedforward Capacitor CFF Selection
- 8.2.2.9 Maximum Ambient Temperature
- 8.2.3 Application Curves
- 8.3 Best Design Practices
- 8.4 Power Supply Recommendations
- 8.5 Layout
- 9 Device and Documentation Support
- 10Mechanical, Packaging, and Orderable Information
8.2.3 Application Curves
VIN = 24 V, VOUT = 5 V, L1= 6.8 µH, COUT = 44 µF, TA = 25°C (unless otherwise noted)
VIN = 24 V, VOUT = 5 V, L1= 6.8 µH, COUT = 44 µF, TA = 25°C (unless otherwise noted)Figure 8-2 Efficiency. VIN = 24 V, VOUT = 5 V, L1= 6.8 µH, COUT = 44 µF, TA = 25°C (unless otherwise noted)
Figure 8-4 Line Regulation
Figure 8-6 Loop Frequency Response, IOUT = 3 A, BW = 49.4 kHz, PM = 57°, GM = –12 dB
Figure 8-8 Start-Up Relative to VIN, IOUT = 3 A
Figure 8-10 Start-Up Through EN, IOUT = 3 A
Figure 8-12 Steady State, IOUT = 0 A
Figure 8-14 Steady State, IOUT = 0.5 A
Figure 8-16 Steady State, IOUT = 2 A
Figure 8-18 Load Transient Response, 0.5 to 2.5 A, Slew Rate = 0.8 A/μSFigure 8-20 VOUT Hard Short Protection
Figure 8-3 Load Regulation
Figure 8-5 Switching Frequency vs Load Current
Figure 8-7 Case Temperature,
VIN = 24 V,
IOUT = 3 A, fSW = 500 kHz
IOUT = 3 A, fSW = 500 kHz
Figure 8-9 Shutdown Relative to VIN, IOUT = 3 A
Figure 8-11 Shutdown Through EN, IOUT = 3 A
Figure 8-13 Steady State, IOUT = 0.1 A
Figure 8-15 Steady State, IOUT = 1 A
Figure 8-17 Steady State, IOUT = 3 A
Figure 8-19 Load Transient Response, 1 to 3 A, Slew Rate = 0.8 A/μS
Figure 8-21 VOUT Hard Short Recovery