SLUUAQ0C October 2013 – November 2021 TPS53513
5.1 Test Equipment
Voltage Source: The input voltage source VIN must be a 0-V to 14-V variable DC source capable of supplying 10 ADC. Connect VIN to J1 as shown in Figure 5-2.
Multimeters:
- V1: VIN at TP1 (VIN) and TP4 (GND)
- V2: VOUT at TP7 (VOUT) and TP9 (GND)
Output Load: The output load must be an electronic constant resistance mode load capable of 15 ADC at 1.2 V.
Oscilloscope: A digital or analog oscilloscope can be used to measure the output ripple. The oscilloscope should be set for the following:
- 1-MΩ impedance
- 20-MHz bandwidth
- AC coupling
- 1-μs/div horizontal resolution
- 20-mV/div vertical resolution
Test points TP7 and TP9 can be used to measure the output ripple voltage by placing the oscilloscope probe tip through TP7 and holding the ground barrel on TP9 as shown in Figure 5-1. Using a leaded ground connection may induce additional noise due to the large ground loop.
Figure 5-1 Tip and Barrel Measurement for VOUT RippleRecommended Wire Gauge:
- VIN to J1 (12V input): The recommended wire size is 1× AWG #14 per input connection, with the total length of wire less than four feet (two feet input, two feet return).
- J3 to LOAD: The minimum recommended wire size is 2× AWG #14, with the total length of wire less than four feet (two feet output, two feet return).