DC590B データシートの表示（PDF） - Linear Technology

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DC590B

USB SERIAL CONTROLLER

Linear Technology 

APPENDIX A

Another option is to supply power to the iso-

lated side of the controller (see Figure 4)

back through the board under evaluation.

The LT1761 regulator is reverse-current pro-

tected. This allows any convenient 5V ±10%

regulated supply to be used. In this case, the

isolation circuitry on DC590 is also powered

from this source. worst-case current draw by

DC590 is 50mA.

5V

REGULATED

SUPPLY

DEMONSTRATION

CIRCUIT

UNDER

EVALUATION

14-CONDUCTOR

RIBBON

CABLE

Figure 4. Supplying power to the controller through the board under evaluation

USB CABLE

TO HOST PC

10

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