TIDT293 October   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Design Variants
  5. 2Design Overview
    1. 2.1 Board Contents
    2. 2.2 Connector Description
    3. 2.3 User Interface
      1. 2.3.1 Switches and Push-buttons
      2. 2.3.2 Jumpers
      3. 2.3.3 Potentiometers
    4. 2.4 Functional Block Diagram
    5. 2.5 Functional Block Descriptions
  6. 3Features and Performance Curves
    1. 3.1  Test Setup
    2. 3.2  Pulse
    3. 3.3  Levels and Free Run
    4. 3.4  INP
    5. 3.5  Dual-Output Power Supply
    6. 3.6  Overtemperature Protection
    7. 3.7  Slew Rate Adjust
    8. 3.8  Settling Time Adjust
    9. 3.9  Low- and High-Level Adjust
    10. 3.10 Pulse-Width Adjust
    11. 3.11 Period and Delay Adjust
    12. 3.12 Frequency Response
  7. 4Operation
    1. 4.1 Initial Setup – Jumper Selection and Potentiometer Settings
    2. 4.2 Procedure
      1. 4.2.1 Initial Power Up
      2. 4.2.2 Connecting the Circuit Under Test
  8. 5Limitations and Capabilities
    1. 5.1 Wiring Inductance
    2. 5.2 Minimum Voltage
    3. 5.3 Battery Life
  9. 6Typical Failure Mechanism
    1. 6.1 Fast Thermal Failure
    2. 6.2 Slow Thermal Failure

3.10 Pulse-Width Adjust

The high-level pulse width adjustment is made by turning the potentiometer R47. Jumpers J12 and J13 can be installed to set the range of pulse-width adjustment. Pulse widths range from a minimum of 11 µs and maximum of 13 ms.

The following scope plot is the minimum pulse-width adjustment for the high-level step. The load step board is set up for a 1-A to 5-A load transient for a 5-V output. The results in the following waveform use a PSMN008-75B MOSFET in the 125-A, 50-V variant.

GUID-20220531-SS0I-ZKQ3-TQLZ-LD4KVHMVSVGQ-low.png Figure 3-19 Minimum 11-µs High-Level Pulse Width

The following scope plot is the maximum pulse-width adjustments for the high-level step. The load step board is set up for a 1-A to 4-A load transient for a 5-V output. The results in the following image use a PSMN008-75B MOSFET in the 125-A, 50-V variant.

GUID-20220531-SS0I-BHVJ-7ZJ5-MZZRZXFBW3QJ-low.png Figure 3-20 Maximum 13-ms High-Level Pulse Width