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BD1754HFN

Datasheet

TSZ02201-0G3G0C200060-1-2

10.Dec.2015 Rev.002

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.

 

 

 









k

R

mV

mA

I

ISET

LED

/

600

4

.

6

max

obtained from the following formula (where, n indicates a state number).

 

64

/

max

n

I

mA

I

LED

LED







The table below shows an example of the LED current settings, when ISET resistance is 120

[kΩ].

: 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 (kΩ)

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