Rainbow-electronics MAX6948B Manuel d'utilisateur télécharger pdf (Page 20)

High-Efficiency PWM LED Driver with Boost

Converter and Five Constant-Current GPIO Ports

MAX6948B

Table 11. Port Ramp-Down Register Format (0x11) (continued)

X = Don’t care.

Table 12. Port Ramp-Up Register Format (0x12)

X = Don’t care.

D7 D6 D5 D4 D3 D2 D1 D0

RESERVED HOLD-OFF RAMP-DOWN

4.164s ramp-down from full current after

ramp-down delay

X X X X X 1 1 1

Zero ramp-down delay before fade-off X X 0 0 0 X X X

0.0655s ramp-down delay before fade-off X X 0 0 1 X X X

0.131s ramp-down delay before fade-off X X 0 1 0 X X X

0.262s ramp-down delay before fade-off X X 0 1 1 X X X

0.524s ramp-down delay before fade-off X X 1 0 0 X X X

1.049s ramp-down delay before fade-off X X 1 0 1 X X X

2.097s ramp-down delay before fade-off X X 1 1 0 X X X

4.164s ramp-down delay before fade-off X X 1 1 1 X X X

Power-up default 0 0 0 0 0 0 0 0

D7 D6 D5 D4 D3 D2 D1 D0

RESERVED RAMP-UP

Immediately starts up X X X X X 0 0 0

0.0655s ramp-up to full current X X X X X 0 0 1

0.131s ramp-up to full current X X X X X 0 1 0

0.262s ramp-up to full current X X X X X 0 1 1

0.524s ramp-up to full current X X X X X 1 0 0

1.049s ramp-up to full current X X X X X 1 0 1

2.097s ramp-up to full current X X X X X 1 1 0

4.164s ramp-up to full current X X X X X 1 1 1

Power-up default 0 0 0 0 0 0 0 0

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 26 27 28

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Rainbow-electronics MAX6948B Manuel d'utilisateur Page 20