SM8133B Datasheet, PDF (13/20 Pages) Nippon Precision Circuits Inc – White LED Driver IC

SM8133B
Mode data “5H”: LED ON register
Setting data
High
Low
D1
A group ON
A group OFF
D2
B group ON
B group OFF
D3
DIN7 ON
DIN7 OFF
D4
LDO ON
LDO OFF
This register controls the A group, B group, DIN7, and LDO ON/OFF state. Each state is ON when the corre-
sponding bit is HIGH, and OFF when LOW. Each circuit starts when the corresponding bit in address 5H is set
HIGH, transferring from standby mode. It is recommended that these 4 data settings be held LOW when possi-
ble to control current consumption.
Mode data “6H”: System register
Setting data
D1
D2
D3
D4
High
A group maximum
current = 15mA
B group maximum
current = 15mA
DIN7 maximum
current = 75mA
−
Low
A group maximum
current = 30mA
B group maximum
current = 30mA
DIN7 maximum
current = 150mA
−
Note. Target values only. Current rating accuracy is not guaranteed.
This register sets the maximum current drive for each group. For A and B group, LOW sets 30mA as the maxi-
mum, HIGH sets 15mA. For DIN7, LOW sets 150mA, HIGH sets 75mA as the maximum.
LED drive current (Hexadecimal)
A group
B group
DIN7
Dimming
register value ^{A group max. A group max. B group max. B group max.}
DIN7 max.
DIN7 max.
Unit
current = 0 current = 1 current = 0 current = 1 current = 0 current = 1
0H
0
0
0
0
0
0
mA
1H
2
1
2
1
10
5
mA
2H
4
2
4
2
20
10
mA
3H
6
3
6
3
30
15
mA
4H
8
4
8
4
40
20
mA
5H
10
5
10
5
50
25
mA
6H
12
6
12
6
60
30
mA
7H
14
7
14
7
70
35
mA
8H
16
8
16
8
80
40
mA
9H
18
9
18
9
90
45
mA
AH
20
10
20
10
100
50
mA
BH
22
11
22
11
110
55
mA
CH
24
12
24
12
120
60
mA
DH
26
13
26
13
130
65
mA
EH
28
14
28
14
140
70
mA
FH
30
15
30
15
150
75
mA
Note. “H”: Hexadecimal
Note. Target values only. Current rating accuracy is not guaranteed.
NIPPON PRECISION CIRCUITS INC.—13