Texas Instruments LM5013-Q1EVM, Руководство пользователя, Страница: 6 / 18

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 LM5013-Q1EVM. See
Figure 3-1 for a top view of the EVM.
VOUT Output voltage of the converter.
VOUT connector and test point connected to the power inductor and the output capacitors. Connect
the loading device between VOUT and GND connectors to provide loading to the regulator. Connect
the loading device to the board with short wires to handle the DC output current.
GND Ground of the converter.
It is connected to the GND as well as the return terminals of the input and output capacitors. GND
is the current return path for both supply voltage and load. Connect to supply and load grounds with
short wires.
VIN Input voltage to the converter.
VIN connector and test point connects to the input capacitors and the VIN pin of the LM5013-Q1.
Connect the supply voltage from a power supply or a battery between the VIN and GND connectors.
The voltage range should be higher than 6 V for the device to be active. V
VIN
higher than 15-V
provides a regulated 12-V output voltage. To avoid damaging the device V
VIN
should be no greater
than 100-V. The current limit on the supply should be high enough to provide the needed supply
current when the output is fully loaded. The supply voltage should be connected to the board with
short wires. C
7
is populated to avoid oscillation between the cable parasitic inductance and the
low-ESR input ceramic capacitors.
VIN-EMI Input voltage to input filter of the converter.
The supply voltage should be connected to the board with short wires.
The inductor/ferrite in series with input path have some DCR associated with them. Verifying
datasheet specification should be done by shorting these components.
GND-
EMI Ground connection near the input filter.
This is the current return path for the supply connected to VIN-EMI. It provides a direct connection
to the input filter capacitors to filter conducted noise generated by the converter. Use VIN-EMI and
GND-EMI connections at the input filter to minimize EMI.
Input
Filter EMI mitigation.
The input filter consists of a filter inductor, ferrite bead and ceramic capacitors. An electrolytic
capacitor is included for bulk energy storage and input parallel damping.
EN/
UVLO Test point to monitor the EN/UVLO pin of the device.
This test point is to monitor the voltage on the device EN/UVLO pin.
EN/
UVLO Set EN/UVLO
By default, device is hard-enabled. Device enable/disable voltage would correspond to typical
V
EN-RISING
and V
EN-FALLING
datasheet specification.
The enable/disable voltage can be varied by calculating for bottom UVLO resistor R
UV2
.
Calculate the lower UVLO resistor, R
UV2
(R6), based on the desired turn-on voltage of 6 V and the
selected upper UVLO resistor, R
UV1
(R5) , of 1 MΩ using Equation 1 .
UV2 UV1
IN(on)
1.5 V 1.5 V
R R 1 M 332k
V 1.5 V 6 V 1.5 V
˜ ˜ : :
(1)
LM5013-Q1 Evaluation Module www.ti.com
6 LM5013-Q1EVM User's Guide SNVU754A – OCTOBER 2021 – REVISED NOVEMBER 2021
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