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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8.4.2 Mode Selection

The MODE/DATA pin allows mode selection between forced PWM mode and power-save mode for both converters. Furthermore, this pin is a multipurpose pin and provides (besides mode selection) a one-pin interface to receive serial data from a host to set the output voltage, as described in the EasyScale Interface section.

Connecting this pin to GND enables the automatic PWM and power-save-mode operation. The converters operate in fixed-frequency PWM mode at moderate-to-heavy loads, and in the PFM mode during light loads, maintaining high efficiency over a wide load-current range.

Pulling the MODE/DATA pin high forces both converters to operate constantly in the PWM mode, even at light load currents. The advantage is that the converters operate with a fixed frequency, allowing simple filtering of the switching frequency for noise-sensitive applications. In this mode, the efficiency is lower compared to the power-save mode during light loads. For additional flexibility, it is possible to switch from power-save mode to forced PWM mode during operation. This allows efficient power management by adjusting the operation of the converter to the specific system requirements.

In the case of changing the operation mode from forced PWM mode (MODE/DATA = high) to power-save mode (MODE/DATA = 0), enabling the power-save mode occurs after a delay time of ttimeout, which is 520 μs maximum.

Setting the MODE/DATA to 1 enables forced-PWM-mode operation immediately.