5 Test Setup
5.1 Test Equipment
Voltage Source:
The power source must be capable of supplying 8 VDC to 20 VDC at up to 10 A.
Multimeters:
A minimum of three voltage meters are required. Other voltage meters can be used to monitor
some of the test points.
Output Load:
Two constant current electronic loads are recommended. They must be able to sink up to 10 A
when the output is 3.3 V or 5 V.
Oscilloscope:
A minimum 50-MHz digital oscilloscope and a voltage probe is required. The scope can be used
to measure output ripple and monitor some of the test points.
Fan:
A fan is not required when testing the EVM.
Recommended Wire Gauge:
Both loads and input should be connected using a minimum gauge wire of
AWG#16. Also these connections should be kept as short as possible.
5.2 Recommended Test Setup
V1
V3
V4
V5
V6
12V/10A
DC Power
Source
+
-
V2
Electronic
Load #2.
3.3V/8A
+
-
Electronic
Load #1.
5V/8A
+
-
Figure 5-1. TPS51220A EVM-476 Recommended Test Setup
TP7
(TP8)
TP2
(TP3)
Metal Ground
Barrel
Probe Tip
Figure 5-2. Recommended Tip and Barrel Technique to Measure Output Ripple Voltage
Test Setup
6
TPS51220A Buck Controller Evaluation Module User's Guide
SLUU381B – SEPTEMBER 2009 – REVISED FEBRUARY 2022
Copyright © 2022 Texas Instruments Incorporated
