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BD6142AMUV
Datasheet
● How to select the number of LED strings of the current driver
When the number of LED strings of the current driver is reduced, the un-select can be set the matter that the unnecessary
CH1 to 8 terminal is opened. When it uses with 6 lines and so on, it can correspond to it by becoming 2 unnecessary lines
to open.
When VOUT wake up, VOUT boost up until OVP voltage. Once IC detect OVP, VOUT don’t boost up until OVP from next
start up. To set PWM and ENABLE to L, IC reset CH7, 8 status as Figure 27. When VOUT wake up, CH8 (open terminal)
and CH1 are selected as Figure 28.
PWM
CH 1
CH 2
CH 3
ENABLE
OVP
Normal voltage
Reset
CH 4
CH 5
VOUT
CH 6
CH 7
CH1 to 6
0V
0.8V(typ.)
CH 8
CH7 to 8
Figure 27. Select the number of CH lines 1
ENABLE
PWM
Soft start: typ 4.3ms
0V
Vout
Over voltage protect signal
100 μ s(typ.)
Over Voltage Protect
Normal condition
Stable
Terminal select
( LED open protect )
CH1 Terminal
CH8 Terminal
Mask
“Unmask
Typ 0.8V
open
Feedback terminal
CH1 Current 0mA
CH8 Current
CH8
20mA
0mA
CH1
Figure 28. Select the number of CH lines 2 (wake up)
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? 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 15 ? 001
16/30
TSZ02201-0G3G0C400340-1-2
03.Dec.2012 Rev.001
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