SLUUCS3 February   2023 LM2105

 

  1.   Abstract
  2.   Trademarks
  3. 1 Introduction
  4. 2 Description
    1. 2.1 Features
    2. 2.2 I/O Description
  5. 3 Electrical Specifications
  6. 4 Test Summary
    1. 4.1 Definitions
    2. 4.2 Equipment
      1. 4.2.1 Power Supply
      2. 4.2.2 Function Generator
      3. 4.2.3 DMM
      4. 4.2.4 Oscilloscope
    3. 4.3 Equipment Setup
      1. 4.3.1 DC Power Supply Settings
      2. 4.3.2 Digital Multimeter Settings
      3. 4.3.3 Two-Channel Function Generator Settings
      4. 4.3.4 Oscilloscope Settings
      5. 4.3.5 Bench Setup Diagram
  7. 5 Power-Up and Power-Down Procedure
    1. 5.1 Power Up
    2. 5.2 Power Down
  8. 6 Operation With External Bootstrap Diode
  9. 7 Typical Performance Waveforms (CL = 1000 pF)
    1. 7.1 Propagation Delays
  10. 8 Schematic
  11. 9 Layout Diagrams
  12. 10Bill of Materials

5.1 Power Up

  1. Before beginning the power up test procedure, verify the connections with GUID-5265CCAE-37BB-4DE1-9FC4-C08C0594F4FE.html#SLUUBM2965.
  2. Enable supply #1, if the current on DMM1 is more than 0.25 mA and less than 0.71 mA, everything is set correctly.
  3. Enable function generator outputs channel-A and channel-B.
  4. The following conditions should be present:
    1. Stable pulse output on channel-1 and channel-2 in the oscilloscope, refer to #SLUUBM28383.
    2. Frequency measurement should be 100 kHz, ±5 kHz or equal to the programmed function generator frequency.
    3. DMM #1 should display around 3.2 mA ± 1.5 mA with the default load capacitance of 1.0 nF. For more information about operating current, see the LM2105 data sheet.
Figure 5-1 Example Input and Output Waveforms (green and magenta are PWM inputs, blue and dark blue are driver outputs)