Texas Instruments OPA521EVM, Руководство пользователя, Страница: 8 / 15

Getting Started
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8 SBOU208 – June 2018
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OPA521EVM User's Guide
3.4 Enable/Disable Feature
The EVM provides a means to test the enable/disable functionality of the OPA521 with jumper JMP3
(J10). JMP3 (J10) allows 3 options for placing a shorting bar jumper, that allow the user to Enable,
Disable, or use an external waveform generator.
3.5 Current Limitation Capability
The OPA521 EVM provides means to limit the maximum output current that it can provide. A resistance
between the ground and the amplifier`s ILIM pin is used to set the maximum output current limit. This
resistance can be utilized by JMP4 (J12) to set the current limit by positioning the jumper to utilize R10. As
an example, if the designer wants to limit the output current to 1 A, then R10 must be populated with a
resistance of 11.584 k
Ω
which using standard resistance values is approximately 11.5
Ω
.
3.6 LED Indicator
The LED indicators are explained in and Section 1.3 .
4 Appendix
Figure 3 shows the complete schematics of the OPA521 EVM. The bill of materials is shown in Table 3 .
Figure 3. OPA521EVM Schematic