BD9479FV ROHM [Rohm], BD9479FV Datasheet - Page 21

• Manufacturer Part Number: BD9479FV
• Description: White LED Driver for large LCD Panels (DCDC Converter type)
• Manufacturer: ROHM [Rohm]

www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
BD9479FV
● ● ● ● Selection of switching MOSFET transistors
● ● ● ● Selection of rectifier diodes
● ● ● ● Selection of Load switch MOSFET and soft start function
is also occur even if IC is in OFF state.Please insert PMOSFET between V
until the IC starts to operate.In addition, FAIL pin can be used for driving load switch after confirmed the logic theory,
and the breakdown voltage of drain-source needed to be selected larger than V
There will be no problem for switching MOSFET transistors having absolute maximum rating higher than rated current
of the inductor L and VF higher than “C
switching, select transistors with small gate capacity (injected charge amount).
breakdown voltage higher that C
and Source.
Note: Selecting transistors with low on resistance can obtain high efficiency.
Note: Rated current larger than overcurrent protection setting current is recommended.
Select Schottky barrier diodes having current capability higher than the rated current of the inductor L and inverse
In usual DC/DC converter, because there is no switching to a path leading from V
Furthermore, if you would like to make soft start function to load switch, please insert a condenser between Gate
OUT
breakdown voltage, particularly having low forward voltage VF.
OUT
breakdown voltage
21/26
Rectifier diode”. However, to achieve high-speed
IN
and inductor if you want voltage to 0V
IN
.
IN
TSZ02201-0F1F0C100020-1-2
to V
OUT
resulting in output voltage
9.Aug.2012 Rev.001
Datasheet