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BD1754HFN Scheda tecnica(PDF) 8 Page - Rohm

Il numero della parte BD1754HFN
Spiegazioni elettronici  Constant Current LED Driver with 64 Dimming Steps for up to 4 LEDs
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Produttore elettronici  ROHM [Rohm]
Homepage  http://www.rohm.com
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BD1754HFN Scheda tecnica(HTML) 8 Page - Rohm

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


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