ZHCSOF4A February 2022 – September 2022 TPS7H5005-SEP , TPS7H5006-SEP , TPS7H5007-SEP , TPS7H5008-SEP
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
-
7 Specifications
- 7.1 Absolute Maximum Ratings
- 7.2 ESD Ratings
- 7.3 Recommended Operating Conditions
- 7.4 Thermal Information
- 7.5 Electrical Characteristics: All Devices
- 7.6 Electrical Characteristics: TPS7H5005-SEP
- 7.7 Electrical Characteristics: TPS7H5006-SEP
- 7.8 Electrical Characteristics: TPS7H5007-SEP
- 7.9 Electrical Characteristics: TPS7H5008-SEP
- 7.10 Typical Characteristics
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 VIN and VLDO
- 8.3.2 Start-Up
- 8.3.3 Enable and Undervoltage Lockout (UVLO)
- 8.3.4 Voltage Reference
- 8.3.5 Error Amplifier
- 8.3.6 Output Voltage Programming
- 8.3.7 Soft Start (SS)
- 8.3.8 Switching Frequency and External Synchronization
- 8.3.9 Primary Switching Outputs (OUTA/OUTB)
- 8.3.10 Synchronous Rectifier Outputs (SRA/SRB)
- 8.3.11 Dead Time and Leading Edge Blank Time Programmability (PS, SP, and LEB)
- 8.3.12 Pulse Skipping
- 8.3.13 Duty Cycle Programmability
- 8.3.14 Current Sense and PWM Generation (CS_ILIM)
- 8.3.15 Hiccup Mode Operation (HICC)
- 8.3.16 External Fault Protection (FAULT)
- 8.3.17 Slope Compensation (RSC)
- 8.3.18 Frequency Compensation
- 8.3.19 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 Switching Frequency
- 9.2.2.2 Output Voltage Programming Resistors
- 9.2.2.3 Dead Time
- 9.2.2.4 Leading Edge Blank Time
- 9.2.2.5 Soft-Start Capacitor
- 9.2.2.6 Transformer
- 9.2.2.7 Main Switching FETs
- 9.2.2.8 Synchronous Rectificier FETs
- 9.2.2.9 RCD Clamp
- 9.2.2.10 Output Inductor
- 9.2.2.11 Output Capacitance and Filter
- 9.2.2.12 Sense Resistor
- 9.2.2.13 Hiccup Capacitor
- 9.2.2.14 Frequency Compensation Components
- 9.2.2.15 Slope Compensation Resistor
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
9.2.2.10 Output Inductor
For the output inductor, a ripple current of 40% was targeted for the design. Based on the selected ripple current, Equation 60 can be used to determine the output inductor value. KL is the current ripple factor, which will be set to 0.4 in this instance.
Equation 60. 
Equation 61. 
The value of the inductor selected for the design is 0.47 μH.