ZHCSSS8 august 2023 TPS552872
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 描述
- 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 VCC Power Supply
- 7.3.2 EXTVCC Power Supply
- 7.3.3 Input Undervoltage Lockout
- 7.3.4 Enable and Programmable UVLO
- 7.3.5 Soft Start
- 7.3.6 Shutdown
- 7.3.7 Switching Frequency
- 7.3.8 Switching Frequency Dithering
- 7.3.9 Inductor Current Limit
- 7.3.10 Internal Charge Path
- 7.3.11 Output Voltage Setting
- 7.3.12 Output Current Monitoring and Cable Voltage Droop Compensation
- 7.3.13 Output Current Limit
- 7.3.14 Overvoltage Protection
- 7.3.15 Output Short Circuit Protection
- 7.3.16 Power Good
- 7.3.17 Constant Current Output Indication
- 7.3.18 Thermal Shutdown
- 7.4 Device Functional Modes
- 8 Application and Implementation
- 9 Device and Documentation Support
- 10Mechanical, Packaging, and Orderable Information
8.2.3 Application Curves
Typical condition VIN = 9 V to 18
V, VOUT = 12 V, FSW = 2 MHz, temperature = 25°C, unless otherwise
noted
Figure 8-2 Switching
Waveforms in VIN = 16 V, VOUT = 12 V, IO = 2 A,
FPWM
Figure 8-4 Switching Waveforms in
VIN = 12 V, VOUT = 12 V, IO = 2 A, FPWM
Figure 8-6 Switching Waveforms in
VIN = 9 V, VOUT = 12 V, IO = 2 A, FPWM
Figure 8-8 Start-up Waveforms in VIN
= 16 V, VOUT = 12 V, RLOAD = 6 Ω, FPWM
Figure 8-10 Line Transient Waveforms in
VIN = 9 V to 20 V, VOUT = 12 V, IO = 2 A with 200-μs
Slew Rate, FPWM
Figure 8-12 Output Current Limit Waveforms
in VIN = 16 V, VOUT = 12 V, RLOAD = 3 Ω,
RSNS = 20 mΩ, FPWM
Figure 8-3 Switching
Waveforms in VIN = 16 V, VOUT = 12 V, IO = 0 A,
PFM
Figure 8-5 Switching Waveforms in
VIN = 12 V, VOUT = 12 V, IO = 0 A, PFM
Figure 8-7 Switching Waveforms in
VIN = 9 V, VOUT = 12 V, IO = 0 A, PFM
Figure 8-9 Shutdown Waveforms in VIN
= 16 V, VOUT = 12 V, RLOAD = 6 Ω, FPWM
Figure 8-11 Load Transient Waveforms in
VIN = 16 V, VOUT = 12 V, IO = 0 A to 2 A with 20-μs
Slew Rate, FPWM
Figure 8-2 Switching
Waveforms in VIN = 16 V, VOUT = 12 V, IO = 2 A,
FPWMFigure 8-4 Switching Waveforms in
VIN = 12 V, VOUT = 12 V, IO = 2 A, FPWMFigure 8-6 Switching Waveforms in
VIN = 9 V, VOUT = 12 V, IO = 2 A, FPWMFigure 8-8 Start-up Waveforms in VIN
= 16 V, VOUT = 12 V, RLOAD = 6 Ω, FPWMFigure 8-10 Line Transient Waveforms in
VIN = 9 V to 20 V, VOUT = 12 V, IO = 2 A with 200-μs
Slew Rate, FPWM
Figure 8-12 Output Current Limit Waveforms
in VIN = 16 V, VOUT = 12 V, RLOAD = 3 Ω,
RSNS = 20 mΩ, FPWMFigure 8-3 Switching
Waveforms in VIN = 16 V, VOUT = 12 V, IO = 0 A,
PFMFigure 8-5 Switching Waveforms in
VIN = 12 V, VOUT = 12 V, IO = 0 A, PFMFigure 8-7 Switching Waveforms in
VIN = 9 V, VOUT = 12 V, IO = 0 A, PFMFigure 8-9 Shutdown Waveforms in VIN
= 16 V, VOUT = 12 V, RLOAD = 6 Ω, FPWMFigure 8-11 Load Transient Waveforms in
VIN = 16 V, VOUT = 12 V, IO = 0 A to 2 A with 20-μs
Slew Rate, FPWM