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BD9486F

1ch Boost up type White LED Driver for large LCD

ROHM Semiconductor 

Datasheet

LED Drivers for LCD Backlights

1ch Boost up type

White LED Driver for large LCD

BD9486F

1.1 General Description

BD9486F is a high efficiency driver for white LEDs and is

designed for large LCDs. BD9486F has a boost DCDC

converter that employs an array of LEDs as the light

source.

BD9486F has some protect functions against fault

conditions, such as over-voltage protection (OVP), over

current limit protection of DCDC (OCP), LED OCP

protection, and Over boost protection (FBMAX).

Therefore it is available for the fail-safe design over a

wide range output voltage.

Key Specifications

 Operating power supply voltage range:9.0V to 18.0V

 Oscillator frequency of DCDC: 150kHz (RT=100kΩ)

 Operating Current:

2.6mA(Typ.)

 Operating temperature range:

-40°C to +85°C

1.2 Package(s)

SOP16

W(Typ) x D(Typ) x H(Max)

10.00mm x 6.20mm x 1.71mm

Pin pitch 1.27mm

Features

 DCDC converter with current mode

 VOUT discharge function at shutdown

 LED protection circuit (Over boost protection, LED

OCP protection)

 Over-voltage protection (OVP) for the output voltage

Vout

 Adjustable soft start

 Adjustable oscillation frequency of DCDC

 Wide range of analog dimming 0.2V to 3.0V

 UVLO detection for the input voltage of the power

stage

Figure 1. SOP16

Applications

 TV, Computer Display, LCD Backlighting

1.3 Typical Application Circuit(s)

Figure 2. Typical Application Circuit

○Product structure：Silicon monolithic integrated circuit ○This product has not designed protection against radioactive rays

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13.Feb.2014 Rev.004

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