MAX6948B MAXIM [Maxim Integrated Products], MAX6948B Datasheet - Page 20

• Manufacturer Part Number: MAX6948B
• Description: High-Efficiency PWM LED Driver with Boost Converter and Five Constant-Current GPIO Ports
• Manufacturer: MAXIM [Maxim Integrated Products]

High-Efficiency PWM LED Driver with Boost
Converter and Five Constant-Current GPIO Ports
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.
20
4.164s ramp-down from full current after
ramp-down delay
Zero ramp-down delay before fade-off
0.0655s ramp-down delay before fade-off
0.131s ramp-down delay before fade-off
0.262s ramp-down delay before fade-off
0.524s ramp-down delay before fade-off
1.049s ramp-down delay before fade-off
2.097s ramp-down delay before fade-off
4.164s ramp-down delay before fade-off
Power-up default
Immediately starts up
0.0655s ramp-up to full current
0.131s ramp-up to full current
0.262s ramp-up to full current
0.524s ramp-up to full current
1.049s ramp-up to full current
2.097s ramp-up to full current
4.164s ramp-up to full current
Power-up default
REGISTER DESCRIPTION
REGISTER DESCRIPTION
D7
D7
RESERVED
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
D6
D6
X
X
X
X
X
X
X
X
X
0
X
X
X
X
X
X
X
X
0
RESERVED
D5
D5
X
0
0
0
0
1
1
1
1
0
X
X
X
X
X
X
X
X
0
HOLD-OFF
REGISTER DATA
REGISTER DATA
D4
D4
X
X
X
X
X
X
X
X
X
0
0
1
1
0
0
1
1
0
0
D3
D3
X
X
X
X
X
X
X
X
X
0
1
0
1
0
1
0
1
0
0
D2
D2
X
X
X
X
X
X
X
X
0
0
0
0
1
1
1
1
0
1
0
RAMP-DOWN
RAMP-UP
D1
D1
1
X
X
X
X
X
X
X
X
0
0
0
1
1
0
0
1
1
0
D0
D0
1
X
X
X
X
X
X
X
X
0
0
1
0
1
0
1
0
1
0