ZHCSOO7A August 2021 – November 2021 TPSM8A28 , TPSM8A29
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 Internal VCC LDO and Using External Bias on VCC Pin
- 7.3.2 Enable
- 7.3.3 Output Voltage Setting
- 7.3.4 Internal Fixed Soft Start and External Adjustable Soft Start
- 7.3.5 External REFIN for Output Voltage Tracking
- 7.3.6 Frequency and Operation Mode Selection
- 7.3.7 D-CAP3™ Control
- 7.3.8 Low-Side FET Zero-Crossing
- 7.3.9 Current Sense and Positive Overcurrent Protection
- 7.3.10 Low-Side FET Negative Current Limit
- 7.3.11 Power Good
- 7.3.12 Overvoltage and Undervoltage Protection
- 7.3.13 Out-Of-Bounds (OOB) Operation
- 7.3.14 Output Voltage Discharge
- 7.3.15 UVLO Protection
- 7.3.16 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 Output Voltage Setting Point
- 8.2.2.2 Choose the Inductor
- 8.2.2.3 Set the Current Limit (TRIP)
- 8.2.2.4 Choose the Output Capacitor
- 8.2.2.5 Choose the Input Capacitors (CIN)
- 8.2.2.6 Soft-Start Capacitor (SS/REFIN Pin)
- 8.2.2.7 EN Pin Resistor Divider
- 8.2.2.8 VCC Bypass Capacitor
- 8.2.2.9 BOOT Capacitor
- 8.2.2.10 PGOOD Pullup Resistor
- 8.2.3 Application Curves
- 9 Power Supply Recommendations
- 10Layout
- 11Device and Documentation Support
- 12Mechanical, Packaging, and Orderable Information
10.3 EMI
The TPSM8A28 and TPSM8A29 are compliant with EN55011 Class-A radiated emissions. Figure 11-1 and Figure 11-2 show examples of radiated emissions plots. The graphs include the plots of the antenna in the horizontal and vertical positions.
The EMI plots were measured using the standard TPSM8A29EVM with Ferrite 61 type beads on the input wire.
Figure 10-5 Radiated
Emissions 12-V Input, 1.0-V Outputs, 15-A/Output Load
Figure 10-6 Radiated
Emissions 5-V Input, 1-V Output, 15-A/Output Load