ZHCSNR7A March   2022  – August 2022 TPS55289

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C Timing Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  VCC Power Supply
      2. 7.3.2  EXTVCC Power Supply
      3. 7.3.3  Operation Mode Setting
      4. 7.3.4  Input Undervoltage Lockout
      5. 7.3.5  Enable and Programmable UVLO
      6. 7.3.6  Soft Start
      7. 7.3.7  Shutdown and Load Discharge
      8. 7.3.8  Switching Frequency
      9. 7.3.9  Switching Frequency Dithering
      10. 7.3.10 Inductor Current Limit
      11. 7.3.11 Internal Charge Path
      12. 7.3.12 Output Voltage Setting
      13. 7.3.13 Output Current Monitoring and Cable Voltage Droop Compensation
      14. 7.3.14 Output Current Limit
      15. 7.3.15 Overvoltage Protection
      16. 7.3.16 Output Short Circuit Protection
      17. 7.3.17 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 PWM Mode
      2. 7.4.2 Power Save Mode
    5. 7.5 Programming
      1. 7.5.1 Data Validity
      2. 7.5.2 START and STOP Conditions
      3. 7.5.3 Byte Format
      4. 7.5.4 Acknowledge (ACK) and Not Acknowledge (NACK)
      5. 7.5.5 Target Address and Data Direction Bit
      6. 7.5.6 Single Read and Write
      7. 7.5.7 Multiread and Multiwrite
    6. 7.6 Register Maps
      1. 7.6.1 REF Register (Address = 0h, 1h)
      2. 7.6.2 IOUT_LIMIT Register (Address = 2h) [reset = 11100100h]
      3. 7.6.3 VOUT_SR Register (Address = 3h) [reset = 00000001h]
      4. 7.6.4 VOUT_FS Register (Address = 4h) [reset = 00000011h]
      5. 7.6.5 CDC Register (Address = 5h) [reset = 11100000h]
      6. 7.6.6 MODE Register (Address = 6h) [reset = 00100000h]
      7. 7.6.7 STATUS Register (Address = 7h) [reset = 00000011h]
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Switching Frequency
        2. 8.2.2.2 Output Voltage Setting
        3. 8.2.2.3 Inductor Selection
        4. 8.2.2.4 Input Capacitor
        5. 8.2.2.5 Output Capacitor
        6. 8.2.2.6 Output Current Limit
        7. 8.2.2.7 Loop Stability
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 第三方产品免责声明
    2. 11.2 接收文档更新通知
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 术语表
  12. 12Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

7.6.3 VOUT_SR Register (Address = 3h) [reset = 00000001h]

VOUT_SR is shown in Figure 7-18 and described in Table 7-6.

Return to Summary Table.

Register 03h sets the slew rate of the output voltage change and the response delay time after the output current exceeds the setting output current limit.

The OCP_DELAY [1:0] bits set the response time of the TPS55289 when the output overcurrent limit is hit. This allows the TPS55289 to output high current in a relative short duration time. The default setting is 128 µs so that the TPS55289 immediately limits the output current.

The SR [1:0] bits set 1.25 mV/μs, 2.5 mV/μs, 5 mV/μs, and 10 mV/μs slew rate for output voltage change.

Figure 7-18 VOUT_SR Register
76543210
RESERVEDOCP_DELAYRESERVEDSR
R/W-0bR/W-00bR/W-00bR/W-01b
Table 7-6 VOUT_SR Register Field Descriptions
BitFieldTypeResetDescription
7-6RESERVEDR/W00bReserved
5-4OCP_DELAYR/W00bSets the response time of the device when the output overcurrent limit is reached

00b = 128 µs (Default)

01b = Delay 1.024 × 3 ms

10b = Delay 1.024 × 6 ms

11b = Delay 1.024 × 12 ms

3-2RESERVEDR/W00bReserved
1-0SRR/W01bSets slew rate for output voltage change

00b = 1.25-mV/µs output change slew rate

01b = 2.5-mV/µs output change slew rate (Default)

10b = 5-mV/µs output change slew rate

11b = 10-mV/µs output change slew rate