ZHCSHZ2E December   2014  – March 2022 TPS62406-Q1 , TPS62407-Q1 , TPS62422-Q1 , TPS62423-Q1 , TPS62424-Q1

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Switching Characteristics
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
      1. 8.1.1 Converter 1
      2. 8.1.2 Converter 2
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Enable
      2. 8.3.2 DEF_1 Pin Function
      3. 8.3.3 180° Out-of-Phase Operation
      4. 8.3.4 Short-Circuit Protection
      5. 8.3.5 Thermal Shutdown
      6. 8.3.6 EasyScale Interface: One-Pin Serial Interface for Dynamic Output-Voltage Adjustment
        1. 8.3.6.1 General
        2. 8.3.6.2 Protocol
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-Save Mode
        1. 8.4.1.1 Dynamic Voltage Positioning
        2. 8.4.1.2 Soft Start
        3. 8.4.1.3 100% Duty-Cycle Low-Dropout Operation
        4. 8.4.1.4 Undervoltage Lockout
      2. 8.4.2 Mode Selection
    5. 8.5 Programming
      1. 8.5.1 Addressable Registers
        1. 8.5.1.1 Bit Decoding
        2. 8.5.1.2 Acknowledge
        3. 8.5.1.3 Mode Selection
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Output Voltage Setting
          1. 9.2.2.1.1 Converter 1 Fixed Default Output-Voltage Setting
          2. 9.2.2.1.2 Converter 2 Fixed Default Output-Voltage Setting
        2. 9.2.2.2 Output Filter Design (Inductor and Output Capacitor)
          1. 9.2.2.2.1 Inductor Selection
          2. 9.2.2.2.2 Output-Capacitor Selection
          3. 9.2.2.2.3 Input Capacitor Selection
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 支持资源
    2. 12.2 接收文档更新通知
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 术语表
  13. 13Mechanical, Packaging, and Orderable Information

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8.3.6.1 General

The EasyScale interface is a simple but very flexible one-pin interface to configure the output voltage of both DC-DC converters. A master-slave structure is the basis of the interface, where the master is typically a microcontroller or application processor. Figure 8-3 and Table 8-2 give an overview of the protocol. The protocol consists of a device-specific address byte and a data byte. The device-specific address byte is fixed to 4E hex. The data byte consists of five bits for information, two address bits, and the RFA bit. The RFA bit set to high indicates the request-for-acknowledge condition. The acknowledge condition only applies after correct reception of the protocol.

The advantage of the EasyScale interface compared to other one-pin interfaces is that its bit detection is to a large extent independent from the bit transmission rate. It can automatically detect bit rates between 1.7 kb/s and up to 160 kb/s. Furthermore, the interface shares the MODE/DATA pin and requires no additional pin.