SNAS681A February   2017  – September 2021 TPL5110-Q1

PRODUCTION DATA  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Ratings
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 DRV
      2. 7.3.2 DONE
    4. 7.4 Device Functional Modes
      1. 7.4.1 Start-Up
      2. 7.4.2 Timer Mode
      3. 7.4.3 One-Shot Mode
    5. 7.5 Programming
      1. 7.5.1 Configuring the Time Interval with the DELAY/M_DRV Pin
      2. 7.5.2 Manual MOSFET Power ON Applied to the DELAY/M_DRV Pin
        1. 7.5.2.1 DELAY/M_DRV
        2. 7.5.2.2 Circuitry
      3. 7.5.3 Selection of the External Resistance
      4. 7.5.4 Quantization Error
      5. 7.5.5 Error Due to Real External Resistance
  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
      3. 8.2.3 Application Curve
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Selection of the External Resistance

In order to set the time interval, the external resistance REXT is selected according the following formula:

Equation 1. GUID-7C303B83-6DB1-42AD-BD36-B12AD2719CE6-low.gif

Where:

  • T is the desired time interval in seconds.
  • REXT is the resistance value to use in Ω.
  • a,b,c are coefficients depending on the range of the time interval.

Table 7-1 Coefficients for Equation 1
SETTime Interval Range (s)abc
11 <T≤ 50.2253-20.7654570.5679
25 <T≤ 10-0.128446.9861-2651.8889
310 <T≤ 1000.1972-19.3450692.1201
4100 <T≤ 10000.2617-56.24075957.7934
5T> 10000.3177-136.257134522.4680

EXAMPLE

Required time interval: 8s

The coefficient set to be selected is the number 2. The formula becomes

Equation 2. GUID-4830C31E-EEC8-4B14-8916-68EEEF5B7CD9-low.gif

The resistance value is 10.18 kΩ.

The following Look-Up-Tables contain example values of tIP and their corresponding value of REXT.

Table 7-2 First 9 Time Intervals
tIP (ms)Resistance (Ω)Closest real value (Ω)Parallel of two 1% tolerance resistors, (kΩ)
1005005001.0 // 1.0
20010001000-
300150015002.43 // 3.92
40020002000-
500250025004.42 // 5.76
600300030005.36 // 6.81
700350035004.75 // 13.5
800400040006.19 // 11.3
900450045016.19 // 16.5
Table 7-3 Most Common Time Intervals Between 1s to 2h
tIPCalculated Resistance (kΩ)Closest Real Value (kΩ)Parallel of Two 1% Tolerance Resistors,(kΩ)
1s5.205.2027.15 // 19.1
2s6.796.78812.4 // 15.0
3s7.647.62812.7// 19.1
4s8.308.30614.7 // 19.1
5s8.858.85216.5 // 19.1
6s9.279.22318.2 // 18.7
7s9.719.67319.1 // 19.6
8s10.1810.18011.5 // 8.87
9s10.6810.6817.8 // 26.7
10s11.2011.19915.0 // 44.2
20s14.4114.40516.9 // 97.6
30s16.7816.77832.4 // 34.8
40s18.7518.74822.6 // 110.0
50s20.04720.04728.7 // 66.5
1min22.0222.02140.2 // 48.7
2min29.3529.34935.7 // 165.0
3min34.7334.72963.4 // 76.8
4min39.1139.09763.4 // 102.0
5min42.9042.88754.9 // 196.0
6min46.2946.30175.0 // 121.0
7min49.3849.39297.6 // 100.0
8min52.2452.22488.7 // 127.0
9min54.9254.90286.6 // 150.0
10min57.4457.437107.0 // 124.0
20min77.5777.579140.0 // 174.0
30min92.4392.233182.0 // 187.0
40min104.67104.625130.0 // 536.00
50min115.33115.331150.0 // 499.00
1h124.91124.856221.0 // 287.00
1h30min149.39149.398165.0 // 1580.0
2h170.00170.00340.0 // 340.0