Rainbow-electronics LM3824 Bedienungsanleitung PDF herunterladen (Seite 10)

Look-Up Tables

The following tables show how to convert the duty cycle of

the PWM output to a current value, and vice versa. The

quantization error of

⁄

bit is not shown in these tables.

Please see the “PWM Output and Current Accuracy” section

for more details.

TABLE 1. Current to Duty Cycle Conversion Table

Sense Current

(Imax = 1.0A)

Sense Current

(Imax = 2.0A)

Duty Cycle (%)

1 2 95.5

0.95 1.90 93.2

0.90 1.80 90.9

0.85 1.70 88.6

0.80 1.60 86.4

0.75 1.50 84.1

0.70 1.40 81.8

0.65 1.30 79.5

0.60 1.20 77.3

0.55 1.10 75.0

0.50 1 72.7

0.45 0.90 70.5

0.40 0.80 68.2

0.35 0.70 65.9

0.30 0.60 63.6

0.25 0.50 61.4

0.20 0.40 59.1

0.15 0.30 56.8

0.10 0.20 54.5

0.05 0.10 52.3

0.00 0.00 50

−0.05 −0.10 47.7

−0.10 −0.20 45.5

−0.15 −0.30 43.2

−0.20 −0.40 40.9

−0.25 −0.50 38.6

−0.30 −0.60 36.4

−0.35 −0.70 34.1

−0.40 −0.80 31.8

−0.45 −0.90 29.5

−0.50 −1 27.3

−0.55 −1.10 25

−0.60 −1.20 22.7

−0.65 −1.30 20.5

−0.70 −1.40 18.2

−0.75 −1.50 15.9

−0.80 −1.60 13.6

−0.85 −1.70 11.4

−0.90 −1.80 9.1

−0.95 −1.90 6.8

−1 −2 4.5

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