Datasheet > BCR420UFD-7

BCR420UFD-7

更新时间： 2024-01-05 15:10:21

品牌	Logo	应用领域
美台 - DIODES		驱动光电二极管接口集成电路
页数	文件大小	规格书
13页	723K
描述
LED Driver,

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技术参数
数据手册

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BCR420UFD-7 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	HVSON,	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	1.57	接口集成电路类型：	LED DISPLAY DRIVER
JESD-30 代码：	S-PDSO-N6	JESD-609代码：	e4
长度：	2 mm	复用显示功能：	NO
功能数量：	1	区段数：	2
端子数量：	6	封装主体材料：	PLASTIC/EPOXY
封装代码：	HVSON	封装形状：	SQUARE
封装形式：	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	峰值回流温度（摄氏度）：	260
座面最大高度：	0.63 mm	表面贴装：	YES
端子面层：	Nickel/Palladium/Gold (Ni/Pd/Au)	端子形式：	NO LEAD
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	30	宽度：	2 mm
Base Number Matches：	1

BCR420UFD-7 数据手册

BCR420UFD / BCR421UFD

Application Information

The BCR420/1 are designed for driving low current LEDs with typical

LED currents of 10mA to 350mA. They provide a cost-effective way for

driving low current LEDs compared with more complex switching

regulator solutions. Furthermore, they reduce the PCB board area of the

solution as there is no need for external components like inductors,

capacitors and switching diodes.

Figure 1 shows a typical application circuit diagram for driving an LED

or string of LEDs. The device comes with an internal resistor (R_INT) of

typically 95Ω, which in the absence of an external resistor, sets an LED

current of 10mA (typical) from a V_EN= 3.3V and V_OUT= 1.4V for

BCR421; or V_EN= 24V and V_OUT= 1.4V for BCR420. LED current can

be increased to a desired value by choosing an appropriate external

resistor, R_EXT.

R_EXT

(Optional)

The R_EXTvs I_OUTgraphs should be used to select the appropriate

resistor. Choosing a low tolerance R_EXTwill improve the overall

accuracy of the current sense formed by the parallel connection of R_INT

and R_EXT.

R_EXT

(Optional)

Figure 1 Typical Application Circuit for

Linear Mode Current Sink LED Driver

Two or more BCR420/1s can be connected in parallel to construct

higher current LED strings as shown in Figure 2. Consideration of the

expected linear mode power dissipation must be factored into the

design, with respect to the BCR420/1’s thermal resistance. The

maximum voltage across the device can be calculated by taking the

maximum supply voltage and subtracting the voltage across the LED

string.

V_OUT= V_S– V_LED

P_D= (V_OUT× I_LED) + (V_EN× I_EN

)

As the output current of BCR420/1 increases, it is necessary to provide

appropriate thermal relief to the device. The power dissipation

supported by the device is dependent upon the PCB board material, the

copper area and the ambient temperature. The maximum dissipation

the device can handle is given by:

R_EXT

(Optional)

R_EXT

(Optional)

P_D= ( T_J(MAX)- T_A) / R_θJA

Refer to the thermal characteristic graphs on Page 4 for selecting the

appropriate PCB copper area.

Figure 2 Application Circuit for Increasing LED Current

9 of 13

www.diodes.com

January 2018

BCR420UFD / BCR421UFD

Document number: DS38588 Rev. 3 - 2

1...6 7 8910 11 12 13

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与BCR420UFD-7相关器件

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BCR421UE6327XT	INFINEON	获取价格	暂无描述

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