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TPS92682EVM-70 Power UP and Operation
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42 SLUUC13A – May 2019 – Revised August 2019
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TPS92682EVM Constant Current Two-channel Boost and Boost-to-Battery
Some of the faults or diagnostic bits, as undercurrent (UC) and undervoltage (UV) may remain red as the
channels are not turned on. For example for channel-2 (boost-to-battery), the output undervoltage (UV)
remains red as the load voltage is initially zero. Therefore, this fault is disabled by default until the soft-
start sequence is complete. The output overvoltage (OV), cycle-by-cycle current limit (ILIM), IS Open
(ISO), RT Open (RTO), Power Cycle (PC) and Thermal Warning (TW) should be cleared (change status
to green) before enabling the channels.
Before enabling the channels, make sure to connect LED loads to the outputs of the TPS92682EVM-070.
By setting the Channel 1 and Channel 2 Enable check boxes, the two channels are turned on. At this point
after clicking
Read Faults , for 100% PWM duty cycle, all faults as shown in Figure 54 are cleared.
Figure 54. Enabling the EVM
In some cases, for PWM duty cycles of less than 100%, the UC diagnostic bit may continue to display as
red.
Figure 55. Fault Status
To turn off the channels, de-select the Channel 1 and Channel 2 Enable.
If a power cycle occurs, all the registers reset to default values. In this case, it is necessary to
repeat all the steps described in
Section 8 before re-enabling the converter.