Texas Instruments UCD3138PSFBEVM-027 User Manual page 37

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12.4.6.3 Constant Power and Constant Current Operation
Both hardware and firmware in this EVM support CPCC operation.
output voltage and output current (V
The EVM is delivered already programmed with a constant-power threshold of a few watts over 360 W
and a constant-current threshold of 33 A (typical). These limits are adjustable through the GUI and a new
setting can be saved to data flash. The maximum hardware capability limits the current within 35 A. The
dashed lines represent exceeding the constant power to a higher current, although the maximum current
of this EVM is limited to 35 A.
In addition to setting the previously described thresholds, enabling or disabling the CPCC feature and
configuring a fault timer is also possible. Whenever the State Machine detects CPCC operation a timer
starts. If the timer reaches the time limit specified in
command toggles off and on again, or recycles the input power.
SLUUAK4 – August 2013
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versus I
OUT
Figure 34 shows the GUI default values of these controls.
Figure 33. CCPCC Operation
Figure 34. CPCC Default Values Adjusted Through GUI
Copyright © 2013, Texas Instruments Incorporated
Description of the Digital Phase-Shifted Full-Bridge Converter
Figure 33
). The dashed lines represent an extended view.
OUT
Figure 34, the system latches off until the on
Using the UCD3138PSFBEVM-027
illustrates the behavior of the
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