Datasheet

10-Port Constant-Current LED Drivers and I/O
Expanders with PWM Intensity Control
Output Current Registers
Each output port’s individual constant-current sink can
be set to be either half or full global current. The indi-
vidual currents are set by the output current registers
(Table 7). The global current is set by the global current
register (Table 8).
Each output current can be set individually to best suit
the maximum operating current of an LED load, or even
adjusted on the fly to double the effective intensity con-
trol range of each output. When the global current reg-
ister is set to maximum, the individual current selection
is 10mA (half) or 20mA (full).
REGISTER DATA
REGISTER
R/W
ADDRESS
CODE (HEX)
D7 D6 D5 D4 D3 D2 D1
D0
OUTPUT CURRENT IOUT70 X
IOUT
7
IOUT
6
IOUT
5
IOUT
4
IOUT
3
IOUT
2
IOUT
1
IOUT
0
Output P0 is set to half constant current X XXXXXXX0
Output P0 is set to full constant current X XXXXXXX1
Output P1 is set to half constant current X XXXXXX0X
Output P1 is set to full constant current X XXXXXX1X
Output P2 is set to half constant current X XXXXX0XX
Output P2 is set to full constant current X XXXXX1XX
Output P3 is set to half constant current X XXXX0XXX
Output P3 is set to full constant current X XXXX1XXX
Output P4 is set to half constant current X X X X 0 X X X X
Output P4 is set to full constant current X X X X 1 X X X X
Output P5 is set to half constant current X X X 0 X X X X X
Output P5 is set to full constant current X X X 1 X X X X X
Output P6 is set to half constant current X X 0 X X X X X X
Output P6 is set to full constant current X X 1 X X X X X X
Output P7 is set to half constant current X 0 XXXXXXX
Output P7 is set to full constant current X
0x13
1XXXXXXX
0 XXXXXX
IOUT9
IOUT8
OUTPUT CURRENT IOUT98
1 000000
IOUT9
IOUT8
Output P8 is set to half constant current X XXXXXXX0
Output P8 is set to full constant current X XXXXXXX1
Output P9 is set to half constant current X XXXXXX0X
Output P9 is set to full constant current X
0x14
XXXXXX1X
Table 7. Output Current Register Format
MAX6966/MAX6967
Maxim Integrated
17