TIDT396 June   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graph
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Image
    4. 2.4 Bode Plots
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Turn-on Response

3.3 Load Transients

Load transient response of ISOM8110 versus optocoupler. Wider bandwidth of ISOM8110 provides improved transient performance with same output capacitance. Note the difference in scales for the output voltage: 200mV/div for the ISOM8110 and 500mV/div for the optocoupler.

PMP23470 Load Transient Response With ISOM8110 Figure 3-5 Load Transient Response With ISOM8110

100mA to 700mA load step, 250mA/us slew rate

CH3: Output voltage, AC coupled, 200mV/div, 20MHz bandwidth

CH4: Output current, 200mA/div, 20MHz bandwidth

Measured +192mV and -232mV

PMP23470 Load Transient Response With Optocoupler Figure 3-6 Load Transient Response With Optocoupler

100mA to 700mA load step, 250mA/us slew rate

CH3: Output voltage, AC coupled, 200mV/div, 20MHz bandwidth

CH4: Output current, 500mA/div, 20MHz bandwidth

Measured +960mV and -1200mV