Power Up and Power Down Procedure
6
SLUUCB3 – June 2020
Copyright © 2020, Texas Instruments Incorporated
Using the UCC27288EVM
5
Power Up and Power Down Procedure
5.1
Power Up
1. Before beginning the power up test procedure, verify the connections with
.
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
2. Frequency measurement should be 100 kHz, ±5 kHz or equal to the programmed function
generator frequency
3. DMM #1 should display around 4.6 mA, ±2 mA with the default load capacitance of 1.0 nF. For
more information about operating current, see the
UCC27288 120-V Half-Bridge Driver without
.
5. Connect ENA_IN test point to GND test point with a jumper. The pulse outputs on channel-1 and
channel-2 will cease operation and the voltage level should be near ground.
Figure 2. Example Input and Output Waveforms
(Green and Magenta are PWM Inputs, Yellow and Blue are Driver Outputs)
5.2
Power Down
Use the following steps to power down the EVM:
1. Disable function generator
2. Disable power supply #1
3. Disconnect cables and probes
