Datasheet > A6262KLYTR-T

A6262KLYTR-T

更新时间： 2024-02-03 00:27:07

品牌	Logo	应用领域
急速微 - ALLEGRO		调节器二极管驱动
页数	文件大小	规格书
15页	359K
描述
The A6262 is a linear, programmable current regulator providing up to 100 mA from each of four outputs to drive arrays of high brightness LEDs.

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A6262KLYTR-T 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	,	Reach Compliance Code：	compliant
风险等级：	5.66	接口集成电路类型：	LED DISPLAY DRIVER
JESD-609代码：	e3	湿度敏感等级：	2
端子面层：	Matte Tin (Sn)	Base Number Matches：	1

A6262KLYTR-T 数据手册

A6262

Automotive LED Array Driver

Application Information

Note that the voltage drop across the regulator, V_REG, is always

greater than the specified minimum drop-out voltage, V_DO. The

output current is regulated by making this voltage large enough

to provide the voltage drop from the supply voltage to the total

Power Dissipation

The most critical design considerations when using a linear regu-

lator such as the A6262 are the power produced internally as heat

and the rate at which that heat can be dissipated.

forward voltage of all LEDs in series, V_LED

There are three sources of power dissipation in the A6262:

The total power dissipated in the A6262 is the sum of the quies-

cent power, the reference power, and the power in each of the our

regulators:

• The quiescent power to run the control circuits

• The power in the reference circuit

• The power due to the regulator voltage drop

P_DIS

P_Q+ P_REF

+ P_REGA+ P_REGB+ P_REGC+ P_REGD

The elements relating to these dissipation sources are illustrated

in figure 4.

(7)

The power that is dissipated in each string of LEDs is:

P_LEDx

Quiescent Power The quiescent power is the product of the

quiescent current, I_INQ, and the supply voltage, V_IN, and is not

related to the regulated current. The quiescent power, P_Q, is there-

fore defined as:

V_LEDx× I_LEDx

(8)

where x is A, B, C, or D, and V_LEDxis the voltage across all

LEDs in the string.

P_Q= V_IN× I_INQ

(4)

Reference Power The reference circuit draws the reference

current from the supply and passes it through the reference resis-

tor to ground. The reference current is 8% of the output current

on any one active output. The reference circuit power is the prod-

uct of the reference current and the difference between the supply

voltage and the reference voltage, typically 1.2 V. The reference

power, P_REF, is therefore defined as:

VIN

A6262

V_REG

I_LAx

(V_IN– V_REF) × V_REF

LAx

P_REF

(5)

R_REF

Regulator Power In most application circuits the largest dis-

sipation will be produced by the output current regulators. The

power dissipated in each current regulator is simply the product

of the output current and the voltage drop across the regulator.

V_IN

I_REF

I_INQ

V_LED

IREF

The total current regulator dissipation is the sum of the dissipa-

tion in each output regulator. The regulator power for each output

is defined as:

V_REF

R_REF

GND

P_REGx

(V_IN– V_LEDx) × I_LEDx

(6)

Figure 4. Internal power dissipation sources.

where x is 1, 2, 3, or 4.

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

1...5 6 789 10 11...15

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与A6262KLYTR-T相关器件

型号	品牌	描述	获取价格	数据表
A6263	ALLEGRO	Protected LED Array Driver	获取价格
A6264	ALLEGRO	The A6264 is a linear, programmable current regulator providing up to 100 mA from each of	获取价格
A6264KLPTR-T	ALLEGRO	The A6264 is a linear, programmable current regulator providing up to 100 mA from each of	获取价格
A6264KLYTR-T	ALLEGRO	The A6264 is a linear, programmable current regulator providing up to 100 mA from each of	获取价格
A6265	ALLEGRO	The A6265 is a DC-to-DC converter controller, providing a programmable constant current ou	获取价格
A6265KLP-T	ALLEGRO	LED Driver, PDSO16, LEAD FREE, TSSOP-16	获取价格

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