MIC4420 datasheet(14/26 Pages) MICROCHIP

14 / 26 page

MIC4420/9

DS20006092B-page 14

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2018 - 2022 Microchip Technology Inc. and its subsidiaries.

4.4.6

DEFINITIONS

• CL = Load Capacitance in Farads.

• D = Duty Cycle expressed as the fraction of time

the input to the driver is high.

• f = Operating Frequency of the driver in Hertz.

• IH = Power supply current drawn by a driver when

both inputs are high and neither output is loaded.

• IL = Power supply current drawn by a driver when

both inputs are low and neither output is loaded.

• ID = Output current from a driver in Amps.

• PD = Total power dissipated in a driver in Watts.

• PL = Power dissipated in the driver due to the

driver’s load in Watts.

• PQ = Power dissipated in a quiescent driver in

Watts.

• PT = Power dissipated in a driver when the output

changes states (“shoot-through current”) in Watts.

Please note that the “shoot-through” current from

a dual transition (once up, once down) for both

drivers is shown by Figure 2-15 and is in

ampere-seconds. This figure must be multiplied

by the number of repetitions per second

(frequency) to find Watts.

• RO = Output resistance of a driver in Ohms.

• VS = Power supply voltage to the IC in Volts.

FIGURE 4-3:

Peak Output Current Test Circuit.

MIC4429

6, 7

+18 V

0.1μF

TEK CURRENT

PROBE 6302

10,000 pF

POLYCARBONATE

5.0V

0 V

18 V

0 V

WIMA

MK22

1 μF

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