BD9267KUT datasheet(1/31 Pages) ROHM

Part #	BD9267KUT

Description	White LED Diver for Backlight of Medium/Large-sized LCDs

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Manufacturer	ROHM [Rohm]

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BD9267KUT

○

Product structure

：

Silicon monolithic integrated circuit

○

This product is not designed protection against radioactive rays

1/28

TSZ02201-0F1F0C100050-1-2

03.Aug.2012 Rev.001

www.rohm.com

TSZ22111

・

14

・

001

Datasheet

LED Drivers for LCD Backlights

White LED Diver for

Backlight of Medium/Large-sized LCDs

BD9267KUT

●

General Description

BD9267KUT is a white LED diver used on backlight of

Medium/Large-sized LCDs. This IC can achieve

dimming function by SPI control. And through the SPI

correspondence, it can set the ON/OFF of each switch,

analog dimming and etc. The signals of PWM dimming

can set the frequency, ON time and delay of PWM by

inputting the external signals to the register.

BD9267KUT has equipped several protection functions

to deal with the abnormal states, including LED OPEN

protection, LED SHORT protection, external current

setting resistance SHORT protection, external MOS

transistor SHORT protection, etc. So it can be used in a

wide output voltage range and various load conditions.

●

Key Specifications

■

VCC power supply range

：

9.0V

～

35.0V

■

DVDD power supply range

：

3.0V

～

3.6V

■

CLK frequency setting range

：

100

～

10000kHz

■

Operating Circuit current range

：

2.4mA(typ.)

■

Operating temperature range

：

-40

℃～

+85

℃

●

Applications

TV

、

PC display

Other LCD backlight

●

Features

■

16-ch constant current driver (external FET(NMOS

）

is

equipped.)

■

LED voltage can be set externally.

■

PWM dimming and Analogue dimming can be

controlled by SPI.

■

LED Abnormal operation detection circuit (OPEN

protection/ SHORT protection) is equipped.

■

LED SHORT protection detection voltage is adjustable

(LSP terminal)

■

LED SHORT protection detection CH

■

FAIL INDICATION function is equipped by ERR_DET

terminal.

■

3 lines serial interface

■

Package: TQFP64U

●

Package

W(Typ.)

D(Typ.)

H(Max.)

TQFP64U

9.00mm

×

9.00mm

×

1.20mm

Pin Pitch

0.4mm

●

Typical Application Circuit

Figure 1. TQFP64U

Figure 2. Typical Application Circuit

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