Rainbow Electronics LM3824 - Manual (Page 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 1 ⁄
2
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
LM3824
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