Datasheet > A6262KLPTR-T

A6262KLPTR-T

更新时间： 2024-02-09 22:10:28

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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A6262KLPTR-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

A6262KLPTR-T 数据手册

A6262

Automotive LED Array Driver

Sleep Mode

VIN

When EN is held low the A6262 will be in shutdown mode and

all sections will be in a low power sleep mode. The input current

will be typically less than 10 μA. This means that the complete

circuit, including LEDs, may remain connected to the power sup-

ply under all conditions.

A6262

LA1

A. Any LED cathode short to ground.

Current remains regulated in

non-shorted LEDs. Matching may be

affected.

LA2

LA3

LA4

Safety Features

The circuit includes several features to ensure safe operation and

to protect the LEDs and the A6262:

GND

• The current regulators between VIN and each LAx output pro-

vide a natural current limit due to the regulation.

• Each LAx output includes a short-to-ground detector that will

disable the output to limit the dissipation.

• The thermal monitor reduces the regulated current as the tem-

perature rises.

VIN

A6262

LA1

LA2

LA3

LA4

B. Any LAx output short to ground.

Shorted output is disabled. Other

outputs remain active.

• Thermal shutdown completely disables the outputs under ex-

treme overtemperature conditions.

Short Circuit Detection A short to ground on any LED

cathode (figure 1A) will not result in a short fault condition. The

current through the remaining LEDs will remain in regulation and

the LEDs will be protected. Due to the difference in the voltage

drop across the LEDs, as a result of the short, the current match-

ing in the A6262 may exceed the specified limits.

GND

VIN

Any LAx output that is pulled below the short detect voltage (fig-

ure 1B) will disable the regulator on that output. A small current

will be sourced from the disabled output to monitor the short and

detect when it is removed. When the voltage at LAx rises above

the short detect voltage, the regulator will be re-enabled.

A6262

LA1

LA2

LA3

LA4

C. Current remains regulated.

Matching may be affected.

Only the shorted LED is inactive.

A shorted LED (figure 1C) will not result in a short fault condi-

tion. The current through the remaining LEDs will remain in

regulation and the LEDs will be protected. Due to the difference

in the voltage drop across the LEDs, as a result of the short, the

current matching in the A6262 may exceed the specified limits.

GND

A short between LEDs in different strings (figure 1D) will not

result in a short fault condition. The current through the remain-

ing LEDs will remain in regulation and the LEDs will be pro-

tected. The current will be summed and shared by the affected

strings. Current matching in the strings will then depend on the

LED forward voltage differences.

VIN

A6262

LA1

D. Short between LEDs in different

strings. Current remains regulated.

Current is summed and shared by

affected strings. Intensity match

dependent on voltage binning.

LA2

LA3

LA4

Temperature Monitor A temperature monitor function,

included in the A6262, reduces the LED current as the silicon

junction temperature of the A6262 increases (see figure 2). By

mounting the A6262 on the same thermal substrate as the LEDs,

this feature can also be used to limit the dissipation of the LEDs.

GND

Figure 1. Short circuit conditions.

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

1...3 4 567 8 9...15

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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

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