Serial Port Interface; Led Indicators - Texas Instruments UCD3138PSFBEVM-027 User Manual

Description of the Digital Phase-Shifted Full-Bridge Converter
12.3.5

Serial Port Interface

The schematic of the interface for the serial port (UART) is shown in
time debug and subsequently reduces code-development time. This serial port also monitors for fast-
changing internal variables.
12.3.6

LED Indicators

Ref. Designator
D26
D2
D3
D5
30
Using the UCD3138PSFBEVM-027
Figure 28. Serial Port Interface in the Converter
Table 5. LED Status Lights
Silk Screen Text
12VP_ON This LED turns green when 12 V is present on the primary side.
FAILURE This LED turns red when a fault is detected.
This LED turns green when the output voltage is within the thresholds defined
P_GOOD by PMBUS_CMD_POWER_GOOD_ON and
PMBUS_CMD_POWER_GOOD_OFF[1].
AC_P_FAIL_OUT This LED is not used.
Copyright © 2013, Texas Instruments Incorporated
Figure 28. The UART provides real-
Function
SLUUAK4 – August 2013
Submit Documentation Feedback
www.ti.com