Datasheet > BD9421F

BD9421F

更新时间： 2024-09-25 01:14:15

品牌	Logo	应用领域
罗姆 - ROHM		/
页数	文件大小	规格书
31页	1174K
描述
White LED Driver for large LCD Panels (DCDC Converter Type)

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BD9421F 数据手册

Datasheet

LED Drivers for LCD Backlights

White LED Driver for large LCD Panels

(DCDC Converter Type)

BD9421F

General Description

Key Specifications

BD9421F is high efficiency driver for white LED. This is

designed for large sized LCD. BD9421F is built-in

DCDC converters that supply appropriate voltage for

light source.



VCC Supply Voltage Range:

9.0V to 35.0V

DCDC Oscillation Frequency:150kHz(RT=100kΩ)

Operation Circuit Current:

Operating Temperature Range:

5mA(Typ)

-40°C to +85°C

BD9421F is also built-in protection function for

abnormal state such as OVP: over voltage protection,

OCP: over current limit protection of DCDC, SCP: short

circuit protection, open detection of LED string.

Thus this is used for conditions of large output voltage

and load conditions.

Applications

 LED driver for TV, Monitor and LCD Back Light

Package

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

15.00mm x 7.80mm x 2.01mm

Pin Pitch 1.27mm

SOP24

Features



6ch LED constant current driver(External PNP Tr

Type)



Maximum LED setting current 500mA(VREF Pin

setting)

 ±2% LED current accuracy(VREF=0.9V setting)



Built-in DC/DC converter

Analog Dimming(Linear) function

LED protection function(OPEN/SHORT

protection)[PWM-independent Type]

Individual detection and individual LED OFF for both

OPEN and SHORT circuit

VOUT Over Voltage Protection(OVP) and reduced

voltage protection(SCP) circuit



Built-in under voltage lockout function(UVLO) and

over voltage protection(OVP)

Figure 1. SOP24

Built-in VOUT discharge circuit while shutdown

Typical Application Circuit

Figure 2. Typical Application Circuit

〇Product structure : Silicon monolithic integrated circuit 〇This product has no designed protection against radioactive rays

.www.rohm.com

TSZ22111 • 14 • 001

TSZ02201-0F1F0C100310-1-2

25.Sep.2015 Rev.003

1/27

12 3 4 5 6 7...31

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与BD9421F相关器件

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BD9421F_15	ROHM	获取价格	White LED Driver for large LCD Panels (DCDC Converter Type)
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BD9421F-XX	ROHM	获取价格	White LED Driver for large LCD Panels (DCDC Converter Type)
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