Texas Instruments CSD87588N, Руководство пользователя

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Test Setup
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4 Test Setup
4.1 Test Equipment
Voltage source VIN: The input voltage source VIN must be a 0-V to 20-V variable DC source capable of
supplying 10 ADC. Connect VIN to J303 (as shown in Figure 3 ).
Voltage source V5VIN: The input voltage source V5VIN must be a 0-V to 5-V variable DC source
capable of supplying 1 ADC. Connect V5VIN to J301 (as shown in Figure 3 ).
Multimeters:
• V1: VIN at TP304 (Vins) and TP305 (GNDS)
• V2: 5V at TP301 (5V) and TP302 (GND)
• V3: Vouts at TP308 (Vouts) and TP309 (GNDS)
• A1: VIN input current
• A2: V5VIN input current
Output load: The output load must be an electronic constant-resistance mode load capable of 0-ADC to
30-ADC at 1.0 V.
Oscilloscope: A digital or analog oscilloscope can be used to measure the switch node waveform.
Differential probe must be used for the switch node waveform measurements. The oscilloscope should be
set for 50-
Ω impedance, 1-GHz bandwidth, DC coupling, 50-ns/division horizontal resolution, 5-V/division
vertical resolution. When measuring the switch node waveform, place the negative probe tip on the GND
pad of the input cap and positive tip on the CSD87588N Vsw top metal (as shown in
Figure 2 ).
Figure 2. Tip and Barrel Measurement for Vsw Waveform
Fan: TI recommends a small fan capable of 200 to 400 LFM to reduce component temperatures while the
EVM is operating. The fan needs to run when load current is higher than 20 A.
Recommended Wire Gauge:
1. VIN to J303 (8-V to 20-V input):
The recommended wire size is 1x AWG number 14 per input connection, with the total length of wire
less than 4 ft (2 ft input, 2 ft return).
2. V5VIN to J301 (5-V input):
The recommended wire size is 1x AWG number 18 per input connection, with the total length of wire
less than 4 ft (2 ft input, 2 ft return).
3. J304 to LOAD:
The minimum recommended wire size is 2x AWG number 14, with the total length of wire less than 4 ft
(2 ft output, 2 ft return).
4 High Power Density, Low Profile NexFET™ Power Block II for Notebook SLPU002A – February 2014 – Revised February 2014
Power Supply
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