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參數(shù)資料
| 型號： | BD6155FVM |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | DC/DC converter for LCD back light |
| 中文描述： | 直流/直流轉換器，用于LCD背光 |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 111K |
| 代理商： | BD6155FVM |
BD6155FVM
Communication ICs
6/7
!
Application example
CHARGE
PUMP
DRIVER
CURRENT
CONT
1
2
3
4
CURRENT1
CURRENT2
STBY
LEDS
RSENS
2.7
8
V
BAT
C
C1
1
μ
F
(RB521S30)
D1
(RB521S30)
D2
1
μ
F
C2
GND
LED
V
OUT
7
6
5
1
μ
F
C3
!
Attached components
(1) We recommend capacitor with lower ESR.
(2) We recommend capacitor with is good characteristics to temperature.
(3) Mount all capacitor as close together as possible.
!
Operation notes
(1) The notes in power supply turning on.
Turn STBY pin (pin3) in the low state with power supply.
From this sequence, current flowing to the LED terminal is prevented.
(2) Patern layout
Make wiring for power supply, GND and – GND short and thick. Take into considerations the power supply ripple.
A coupling capacitor, which lowers power supply impedance will make it decline.
(3) Though this product is carefully checked for quality assurance, however if it exceeds the absolute maximum rating
such as applied voltage and operating temperature range, this IC may be deteriorated or damaged. One this IC is
damaged, short-circuits and open modes can not be identified. If the usage of the devices involves operations which
will exceed the absolute maximum rating, then it is necessary to take safety measures such as a fuse to protect the
device.
(4) GND
Electric potential as the GND pin must be minimum in any operating condition. Keep the electric potential of the GND
pin below that of the other pins except GND pin in consideration of transient phenomenon.
(5) Thermal design
Be careful to ensure adequate margins for thermal design in consideration of power dissipation (Pd) in actual
operating mode.
(6) Misplacement and short-circuit between pins
When you put the IC on the print-circuit board, please be careful of the direction and correct placement of the IC.
If the IC is placed wrongly, IC may be damaged. And also, the IC may be damaged if an alien substance is mixed into
the line (output-output or output-GND) to be short.
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