AMC22C12 datasheet(32/46 Pages) TI

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8.2.3 Application Curves

Figure 8-3 shows the typical response of the AMC22C12-Q1 to a bipolar, triangular input waveform with an

amplitude of 720 mVPP. The output (OUT) switches when VIN crosses the ±250-mV level determined by the

REF pin voltage that is biased to 250 mV in this example.

Figure 8-3. Output Response of the AMC22C12-Q1 to a Triangular Input Waveform

The integrated LDO of the AMC22C12-Q1 greatly relaxes the power-supply requirements on the high-voltage

side and allows powering the device from non-regulated transformer, charge pump, and bootstrap supplies. As

given by the following images, the internal LDO provides a stable operating voltage to the internal circuitry,

allowing the trip thresholds to remain mostly undisturbed even at ripple voltages of 2 VPP and higher.

VDD1 Ripple Voltage (VPP)

0.2

0.4

0.6

0.8

1.2

1.4

D063a

VDD1 = 5 V

VDD1 = 10 V

Figure 8-4. Trip Threshold Sensitivity to VDD1

Ripple Voltage (Cmp0, fRIPPLE = 10 kHz)

VDD1 Ripple Voltage (VPP)

0.2

0.4

0.6

0.8

1.2

1.4

D063b

VDD1 = 5 V

VDD1 = 10 V

Figure 8-5. Trip Threshold Sensitivity to VDD1

Ripple Voltage (Cmp1, fRIPPLE = 10 kHz)

AMC22C12-Q1

SBASAJ9A – JUNE 2022 – REVISED AUGUST 2022

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AMC22C12 Datasheet(PDF) 32 Page - Texas Instruments