3.1 Output Voltage Setpoint
To change the output voltage of the EVMs, it is necessary to change the value of resistor R4. Changing the
value of R4 can change the output voltage. The value of R4 for a specific output voltage can be calculated using
(1)
lists the R4 values for some common output voltages. Note that the values given in
are
standard values and not the exact value calculated using above equation.
Table 3-1. Output Voltages
Output Voltage
(V)
R4
(kΩ)
R6
(kΩ)
TYP L1
(µH)
C5+C6+C7
(µF)
CFF
(pF)
Min
Typ
Max
0.85
0.55
10.0
2.2
20
44
110
0.9
1.2
10.0
2.2
20
44
110
1.0
2.4
10.0
2.2
20
44
110
1.05
3
10.0
2.2
20
44
110
1.2
4.9
10.0
2.2
20
44
110
1.5
8.6
10.0
2.2
20
44
110
1.8
12.3
10.0
2.2
20
44
110
2.5
21
10.0
3.3
20
44
110
3.3
31
10.0
3.3
20
44
110
10-220
5.0
52
10.0
4.7
20
44
110
10-220
6.5
70.5
10.0
4.7
20
44
110
10-220
4 Test Setup and Results
This section describes how to properly connect, set up, and use the TPS562207EVM. The section also includes
test results typical for the evaluation modules and efficiency, output load regulation, output line regulation, load
transient response, output voltage ripple, input voltage ripple, start-up, and shut-down.
4.1 Input/Output Connections
The TPS562207EVM is provided with input/output connectors and test points as shown in
.
shows connectors and jumpers placement on TPS562207EVM board.
A power supply capable of supplying 2 A must be connected to J1 through a pair of 20-AWG wires. The load
must be connected to J2 through a pair of 20-AWG wires. The maximum load current capability is 2A. Wire
lengths must be minimized to reduce losses in the wires. Test point TP2 provides a place to monitor the V
IN
input
voltages with TP6 providing a convenient ground reference. TP3 is used to monitor the output voltage with TP10
as the ground reference.
Modifications
SLUUC43A – JANUARY 2020 – REVISED JULY 2020
TPS562207EVM 2-A, Synchronous Step-down Converter Evaluation Module
3
Copyright © 2020 Texas Instruments Incorporated