Texas Instruments LM5168FQEVM, User Manual

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3.2 Detailed Descriptions
This section describes the connectors and the test points on the EVM and how to properly connect, set up and
use the LM5169FQEVM EVM. See
Figure 3-1 for location of connectors and jumpers.
VOUT Output voltage of the converter.
VOUT screw terminal connector. Apply load to this connector (+ and -). VOUT test point is used for
monitoring output voltage.
VOUT2 Secondary output voltage of the converter.
VOUT2 screw terminal connector. One side of this output is connected to the primary ground
(GND) through a tie resistor R
tie
(R12). This resistor may be removed for a true floating voltage
source. Apply load to this connector (+ and -).
GND Ground of the converter.
GND and GNDS test points. Used as ground test points for the EVM.
VIN Input voltage to the converter.
VIN screw terminal connector. Apply input voltage to this connector (+ and -). VIN test point is used
for monitoring input voltage.
VINEMI Input voltage to input filter of the converter.
If it is desired to use the built-in EMI filter on the EVM, then connect the input supply to the VINEMI
screw terminal connector (+ and -).
Input
Filter EMI mitigation.
An input EMI filter is provided on the EVM. Note L2 and C18 are not populated and must be
installed for the EMI filter to operate. Also, note that the maximum input voltage to the filter is 100
VDC.
EN/UVLO
Jumper Set EN/UVLO pin options.
Use this jumper to enable/disable the EVM. The resistors connected to this pin set the input UVLO
thresholds. Input UVLO thresholds are set to approximately 6 V and 5.6 V. These levels can be
changed by changing the values of R5 and R7. For external control of the device, these resistors
should be removed and the control signal applied to the center pin of the header. Note that for
accurate shut-down current measurement, these resistors must also be removed and the EN input
(center pin) grounded.
1. Jumper open (default set-up): device starts-up and shuts-down with UVLO.
2. Center pin connected to
ON : device starts-up and shuts-down without UVLO.
3. Center pin connected to OFF : device is off.
PGOOD PGOOD header used as a test point to monitor the power-good indicator. This flag indicates
whether the output voltage has reached its regulation level. PGOOD is an open-drain output that is
tied to V
OUT
through a 100k Ω, resistor R
10
.
www.ti.com LM5169FQEVM Evaluation Module
SNVU757 – JUNE 2021
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LM5169FQEVM EVM User Guide 7
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