Texas Instruments TPS53355EVM-864, Руководство пользователя

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TP7 TP5
Metal Ground Barrel
Probe Tip
Test Setup
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6 SLUUBJ6 – November 2016
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Green TPS53355EVM-864 Evaluation Module
5 Test Setup
5.1 Test Equipment
Voltage Source: The input voltage source V
IN
must be a 0-V to 14-V variable dc source capable of
supplying 10 Adc. Connect V
IN
to J1 as shown in Figure 3 .
Multimeters:
• V1: V
IN
at TP1 (V
IN
) and TP2 (GND).
• V2: VOUT at TP5 (VOUT) and TP7 (GND).
• A1: V
IN
input current
Output Load : The output load must be an electronic constant resistance mode load capable of 0 Adc to
30 Adc at 1.5 V.
Oscilloscope: A digital or analog oscilloscope can be used to measure the output ripple. The oscilloscope
must be set for 1-M Ω impedance, 20-MHz bandwidth, ac coupling, 2-µs/division horizontal resolution, 50-
mV/division vertical resolution. Test points TP5 and TP7 can be used to measure the output ripple voltage
by placing the oscilloscope probe tip through TP5 and holding the ground barrel on TP7 as shown in
Figure 2 . Using a leaded ground connection may induce additional noise due to the large ground loop.
Figure 2. Tip and Barrel Measurement for VOUT Ripple
Fan: Some of the components in this EVM may approach temperatures of 60°C during operation. A small
fan capable of 200–400 LFM is recommended to reduce component temperatures while the EVM is
operating. Only probe the EVM when the fan is running.
Recommended Wire Gauge:
1. VIN to J1 (12-V input):
The recommended wire size is 1x AWG 14 per input connection, with the total length of wire less than
4 feet (2-foot input, 2-foot return).
2. J3 to LOAD:
The minimum recommended wire size is 2x AWG 14, with the total length of wire less than 4 feet (2-
foot output, 2-foot return)