BD9285F Datasheet PDF - ROHM Semiconductor
| Part Number | BD9285F | |
| Description | Boost 1channel white LED driver | |
| Manufacturers | ROHM Semiconductor | |
| Logo |  |
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There is a preview and BD9285F download ( pdf file ) link at the bottom of this page. Total 30 Pages | ||
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Datasheet
Boost 1channel white LED driver
For large LCDs
BD9285F
●General Description
BD9285F is a high efficiency driver for white LEDs and
designed for large LCDs. This IC is built-in a boost
DCDC converters that employ an array of LEDs as the
light source. BD9285F has some protect function against
fault conditions, such as the over-voltage protection
(OVP), the over current limit protection of DCDC (OCP),
LED over current protection (LEDOCP), the open
detection of LED string. Therefore BD9285F is available
for the fail-safe design over a wide range output voltage.
●Features
Current mode DCDC converter
Vout discharge circuit as shutdown
LED protection circuit (OPEN protection, LED OCP
protection)
LED protect detection as small PWM dimming signal
Over-voltage protection (OVP) and low-voltage
protection (SCP: short circuit protection) for the output
voltage Vout
Adjustable soft start time constant
The wide range of analog dimming 0.2V-3.5V
The built-in transformation circuit from pulse to DC
2 PWM dimming signal
The UVLO detection for the input voltage of the power
stage
FAIL logic output
●Applications
TV, PC display and other LCD backlight system.
●Key Specifications
Input voltage range:
9.0V to 18.0V
DCDC oscillation frequency: 150kHz (RT=100kΩ)
Active current consumption:
1.2mA(Typ.)
Operating temperature range:
-40℃ to +85℃
●Package(s)
SOP18
W(Typ.) x D(Typ.) x H(Max.)
11.20mm x 7.80mm x 2.01mm
Pin pitch 1.27mm
Figure 1. SOP18
●Typical Application Circuit(s)
VCC
VIN
VCC
TC54
UVLO
OVP
STB
RT
Css
SS
GATE
CS
FAILB
PWM1
DIMOUT
PWM2
ADIM_P
ADIM
GND
ISENSE
FB
Figure 2. Typical application circuit
○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays
.www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
1/36
TSZ02201-0F1F0C100030-1-2
11.Jul.2012 Rev.001
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BD9285F
●1.3 Pin number, pin name, pin function
No. name
IN/OUT
function
1 OVP
In Over voltage protection detection pin
2 UVLO
In Under voltage lock out detection pin
3 SS
Out Slow start setting pin
4 RT
Out For DC/DC switching frequency setting pin
5 PWM1
In External PWM dimming signal input pin1
6 PWM2
In External PWM dimming signal input pin2
7 FAILB
Out Abnormality detection output pin
8 ADIM
In/Out ADIM signal input-output pin
9 ADIM_P
In ADIM pulse signal input pin
10 GND
--
11 DIMOUT
Out Dimming signal pin for driving MOSFET
12 GATE
Out DC/DC switching output pin
13 STB
In IC On/OFF pin
14 VCC
- Power supply pin
15 ISENSE
In Current detection input pin
16 FB
17 CS
18 TC54
In/Out
In
Out
Error amplifier output pin
DC/DC output current detect pin,
OCP input pin
5.4V output pin, shutdown timer pin
rating[V]
-0.3 to 7
-0.3 to 7
-0.3 to 7
-0.3 to 7
-0.3 to 20
-0.3 to 20
-0.3 to 20
-0.3 to 20
-0.3 to 20
-0.3 to VCC
-0.3 to VCC
-0.3 to 20
-0.3 to 20
-0.3 to 7
-0.3 to 7
-0.3 to 7
-0.3 to 7
Datasheet
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/36
TSZ02201-0F1F0C100030-1-2
11.Jul.2012 Rev.001
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for BD9285F electronic component. |
| Information | Total 30 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Product Image and Detail view |  1. LED Driver ( Datasheet ) [ Learn More ] | |
| Download | [ BD9285F.PDF Datasheet ] | |
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