Texas Instruments UCC20520EVM286, User Manual

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Power-Up and Power-Down Procedure
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10 SLUUBG8B – June 2016 – Revised November 2018
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Using the UCC21520EVM-286, UCC20520EVM-286, UCC21521CEVM-286,
and UCC21530EVM-286
6 Power-Up and Power-Down Procedure
6.1 Power Up
1. Make sure that Section 5.3.6 is implemented for setting up all the equipment before starting the power-
up sequence. Figure 3 can be used as a reference.
2. Enable supply #1;
3. Enable supply #2 and #3, the quiescent current on DMM1 and DMM2 ranges from 1 mA to
approximately 3 mA if everything is set correctly;
4. Enable the function generator, two-channel outputs: channel-A and channel-B;
5. There will be:
1. Stable pulse output on the channel-A and channel-B in the oscilloscope (refer to Figure 3 );
2. Scope frequency measurement is the same with function generator output;
3. DMM #1 and #2 read measurement results should be around 10 mA, ±2 mA under no load
conditions. For more information about operating current, refer to the UCC21520 data sheet .
Figure 3. Example Input and Output Waveforms (Channels 3 and 4 are PWM Inputs, Channels 1 and 2 are
Outputs)
6.2 Power Down
1. Disable function generator;
2. Disable power supply #2 and #3;
3. Disable power supply #1;
4. Disconnect cables and probes;