Texas Instruments TPS23523EVM-863, Руководство пользователя

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Introduction
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2 SLVUBC9 – December 2017
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TPS23523EVM-863 Evaluation Module
30 Unplug V
IN
A
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11
31 Plug in V
IN
A Backwards
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11
32 Plug in V
IN
A Backwards
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11
33 Undervoltage and Overvoltage (Rising)
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11
34 Undervoltage and Overvoltage (Falling)
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12
35 –2-kV (2 Ω ) Lightning Surge
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36 –2-kV (2 Ω ) Lightning Surge (Zoomed in)
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37 2-kV (2
Ω
) Lightning Surge (Zoomed in)
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12
38 2-kV (2 Ω ) Lightning Surge (Zoomed in)
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12
39 Start-Up (V
IN
= 54 V)
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40 Hot Short (V
IN
= 54 V)
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41 Hot Short (V
IN
= 38 V)
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42 Load Step (0 A–11 A)
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43 Load Step Into Overcurrent
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44 Start Into Short
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45 1-ms Brown Out
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46 Effective Circuit for Voltage Monitoring
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15
List of Tables
1 TPS23523 Electrical and Performance Specifications at 25°C
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4
2 Connector Functionality
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5
3 Test Points
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4 Jumper Descriptions
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5 TPS23523 EVM – Measured Voltage Monitoring Accuracy
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6 TPS23523 EVM, Measured Current Monitoring Accuracy
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7 Bill of Materials
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Trademarks
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1 Introduction
The TPS23523 EVM is meant to give a jump start to anyone designing a –48-V system with a single
supply that needs to support supply dips and other transients. It includes input clamping to support
lightning surge (up to 2 kV), various FET placeholders to support various power levels, and an output
inductor to mimic any EMI filter before the DC/DC converter. The EVM can be configured in two ways (via
jumpers) to evaluate 2 common architectures seen in the –48-V telecommunication space.
Figure 1 shows a block diagram for the first configuration of the EVM. The TPS23523 provides inrush
control, short circuit protection, reverse current protection, and reverse hookup protection. The INA226
provides current, voltage, and power monitoring. If the downstream DC/DC is isolated and powers the
microcontroller, an isolator is required to communicate between the microcontroller and the INA226. Thus,
the ISO1541 is added to provide this functionality. Also note that the TPS23523 helps to create a bias rail
to power both the INA226 and ISO1541. For detailed operation of the INA226, consult
INA226EVM
Evaluation Board and Software Tutorial .