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BD1754HFN
Datasheet
(2) Current Driver
The MAX Current is determined by the ISET resistance and the following formula.
ILED-max [mA] = 6.4 x 600 [mV] / R ISET [k ? ]
The LED current state can be changed by the EN control signal. When the state is C n , the output current (ILED) can be
obtained from the following formula (where, n indicates a state number).
ILED [mA] = ILED-max x n / 64
The following table is the example of LED current, when ISET resistance is 120 [k ? ].
R ISET : 120[k ? ]
State
C64
C63
C62
C61
C60
C59
C58
C57
C56
C55
C54
C53
C52
C51
C50
C49
Output current
[mA]
32.0
31.5
31.0
30.5
30.0
29.5
29.0
28.5
28.0
27.5
27.0
26.5
26.0
25.5
25.0
24.5
State
C48
C47
C46
C45
C44
C43
C42
C41
C40
C39
C38
C37
C36
C35
C34
C33
Output current
[mA]
24.0
23.5
23.0
22.5
22.0
21.5
21.0
20.5
20.0
19.5
19.0
18.5
18.0
17.5
17.0
16.5
State
C32
C31
C30
C29
C28
C27
C26
C25
C24
C23
C22
C21
C20
C19
C18
C17
Output current
[mA]
16.0
15.5
15.0
14.5
14.0
13.5
13.0
12.5
12.0
11.5
11.0
10.5
10.0
9.5
9.0
8.5
State
C16
C15
C14
C13
C12
C11
C10
C9
C8
C7
C6
C5
C4
C3
C2
C1
Output current
[mA]
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
When the state is C64 (the maximum value), the output current value can be changed on the ISET resistance value as below.
State : C64
ISET resistance value (k ? )
240
120
90
60
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
Output current per channel (mA)
16.0
32.0
42.7
64.0
8/16
Total output current of the four
channels (mA)
64.0
128.0
170.8
256.0
TSZ02201-0G3G0C200060-1-2
9.NOV.2012 Rev.001
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