Datasheet > BD9271KUT

BD9271KUT

更新时间： 2024-11-30 01:17:23

品牌	Logo	应用领域
罗姆 - ROHM		/
页数	文件大小	规格书
38页	1703K
描述
White LED Diver for Backlight of Medium/Large-sized LCDs

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BD9271KUT 数据手册

Datasheet

LED Drivers for LCD Backlights

White LED Diver for

Backlight of Medium/Large-sized LCDs

BD9271KUT

General Description

Features

BD9271KUT 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.

BD9271KUT 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.

■ 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

Key Specifications

■

VCC power supply range：

9.0V～35.0V

3.0V～3.6V

100～10000kHz

2.4mA(typ.)

Package

TQFP64U

Pin Pitch

W(Typ.) D(Typ.) H(Max.)

9.00mm×9.00mm×1.20mm

0.4mm

DVDD power supply range：

CLK frequency setting range：

Operating Circuit current range：

Operating temperature range：

-40℃～+85℃

Applications

TV, PC display

Other LCD backlight

Figure 1. TQFP64U

Typical Application Circuit

Figure 2. Typical Application Circuit

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

www.rohm.com

TSZ02201-0F1F0C100260-1-2

22.Jul.2015 Rev.006

1/34

TSZ22111・14・001

12 3 4 5 6 7...38

中文翻译

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