TIDT283 May   2022

 

  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Test Setup
  5. 2Testing and Results
    1. 2.1 UCC14240 Power-Up Sequence
    2. 2.2 UCC14240 Output Ripple
    3. 2.3 Gate Waveforms
    4. 2.4 Analog Sense
    5. 2.5 DESAT, OC
    6. 2.6 Thermal Images

2.2 UCC14240 Output Ripple

Output ripple waveforms are shown in the following figures.

The green waveform in Figure 2-2 shows the VEE-COM rail ripple while the output is switching a 100-nF capacitive load at 1 kHz. The peak-to-peak ripple is 252 mV, which is 6.3%.

GUID-20220505-SS0I-WKZC-FNH4-FQ3HTPJSCHCR-low.png Figure 2-2 VEE-COM Switching 100-nF Load at 1 kHz

The green waveform in Figure 2-3 shows the VEE-VDD rail ripple while the output is switching a 100-nF capacitive load at 1 kHz. The peak to peak ripple is 865 mV, which is 3.9%.

GUID-20220505-SS0I-KQ3C-FQFJ-QVWSNTLDC0GJ-low.png Figure 2-3 VEE-VDD Switching 100-nF Load at 1 kHz

The green waveform in Figure 2-4 shows the VEE-COM rail ripple while the output is switching a 100-nF capacitive load at 35 kHz. The peak to peak ripple is 232 mV, which is 5.8%.

GUID-20220505-SS0I-66JQ-GZTQ-L3KPD1FLDBPR-low.png Figure 2-4 VEE-COM Switching 100-nF Load at 35 kHz

The green waveform in Figure 2-5 shows the VEE-VDD rail ripple while the output is switching a 100-nF capacitive load at 35 kHz. The peak to peak ripple is 800 mV, which is 3.6%.

GUID-20220505-SS0I-SSPN-9GZ6-TFJSHTJFJNPD-low.png Figure 2-5 VEE-VDD Switching 100-nF Load at 35 kHz