SN6501

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D1

VCC

GND2

GND2

D2

0.1 …F

VDD2

10 …F

GND2

VDD2

GND1

20 V

20 V

10 …F

0.1 …F

TLV70450

OUT

IN

GND

10 …F

GND1

VDD1

0.1 …F

1 …F

VOUTP

VOUTN

VDD2

GND2

GND1

SHTDN

VIN

VDD1

AMC1311

VDD1

Detection

0.1 …F

1 …F

GND1

GND2

VDD2

25

AMC1311, AMC1311B

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SBAS786 – DECEMBER 2017

Product Folder Links: AMC1311 AMC1311B

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Copyright © 2017, Texas Instruments Incorporated

10 Power Supply Recommendations

In a typical frequency inverter application, the high-side power supply (VDD1) for the AMC1311 is generated

from the low-side supply (VDD2) of the device by an isolated dc-dc converter circuit. A low-cost solution is based

on the push-pull driver SN6501 and a transformer that supports the desired isolation voltage ratings. TI

recommends using a low-ESR decoupling capacitor of 0.1 µF and an additional capacitor of minimum 1 µF for

both supplies of the AMC1311. Place these decoupling capacitors as close as possible to the AMC1311 power-

supply pins to minimize supply current loops and electromagnetic emissions.

specified in the Switching Characteristics table after ramp up of the VDD1 high-side supply.

Figure 52. SN6501-Based, High-Side Power Supply