Texas Instruments UCD3138PSFBEVM-027 User Manual page 29

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12.3.4 Load Current Sensing
Figure 26 and Figure 27
sense-resistance value (R53 // R104 // R105) senses the load current. A differential amplifier circuit
amplifies and filters this signal. The result is supplied to EADC1 and AD13. The sensed current is also
used in constant-current and constant-power (CPCC) operation. The AD13 monitors the current. The
AD13 also has a mechanism for a fast latch-off over current and the means to implement either master-
and-slave or average-mode current sharing.
SLUUAK4 – August 2013
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show how the load current is sensed and fed back to the UCD3138. A 1-mΩ
Figure 26. Load-Current Sensing Connections
Figure 27. Load-Current-Sensing Conditioning Circuit
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Description of the Digital Phase-Shifted Full-Bridge Converter
Using the UCD3138PSFBEVM-027
29