A6261KLPTR-T

更新时间： 2024-02-03 00:52:45

品牌	Logo	应用领域
急速微 - ALLEGRO		显示驱动器调节器驱动程序和接口二极管接口集成电路光电二极管
页数	文件大小	规格书
15页	358K
描述
The A6261 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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技术参数
数据手册

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A6261KLPTR-T 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	TSSOP
包装说明：	HTSSOP, TSSOP10,.19,20	针数：	10
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	1.58
输入特性：	SCHMITT TRIGGER	接口集成电路类型：	LED DISPLAY DRIVER
JESD-30 代码：	S-PDSO-G10	JESD-609代码：	e3
长度：	3 mm	湿度敏感等级：	2
复用显示功能：	NO	功能数量：	1
区段数：	12	端子数量：	10
最高工作温度：	125 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	HTSSOP
封装等效代码：	TSSOP10,.19,20	封装形状：	SQUARE
封装形式：	SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH	峰值回流温度（摄氏度）：	260
电源：	7/40 V	认证状态：	Not Qualified
筛选级别：	AEC-Q100	座面最大高度：	1.06 mm
子类别：	Display Drivers	最大压摆率：	10 mA
最大供电电压：	40 V	最小供电电压：	7 V
标称供电电压：	16 V	表面贴装：	YES
温度等级：	AUTOMOTIVE	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.5 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	40
宽度：	3 mm	Base Number Matches：	1

A6261KLPTR-T 数据手册

A6261

Protected LED Array Driver

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.

A6261 and in the LEDs. The current is reduced from the 100%

level at typically 4% per degree Celsius until the point at which

the current drops to 25% of the full value, defined at T_JL. Above

this temperature the current will continue to reduce at a lower

rate until the temperature reaches the overtemperature shutdown

threshold temperature, T_JF.

Open Load Detection An open load condition is detected

when the voltage across the regulator, V_IN– V_LAx, is less than

the open load detect voltage, V_OCD, but greater than the output

disable threshold voltage, V_ODIS. When this condition is present

for more than the open load detect time, t_OCD, then all regulators

will be disabled and the fault flag allowed to go high.

The temperature at which the current reduction begins can be

adjusted by changing the voltage on the THTH pin. When THTH

is left open the temperature at which the current reduction begins

is defined as the thermal monitor activation temperature, T_JM, and

is specified, in the characteristics table, at the 90% current level.

The regulators will remain disabled until either the power is

cycled off and on, the EN input is taken low then high, or the

T_JMwill increase as the voltage at the THTH pin, V_THTH, is

fault flag, FF, is pulled low. If the power is cycled or EN is pulsed reduced and is defined as approximately:

low, the regulators will start in the enabled state, unless disabled

1.46 –V_THTH

by tying the output to VIN, and the open load detection timer will

be reset. If the open load is still present the regulators will again

be disabled after the open load detect time.

T_JM

(°C)

(3)

0.0039

A resistor connected between THTH and GND will reduce V_THTII

and increase T_JM. A resistor connected between THTH and a refer-

ence supply greater than 1 V will increase V_THTHand reduce T_JM

Pulling the fault flag low will override the open load fault action

and all enabled regulators will be switched on. This state will

be maintained while the fault flag is held low. If the fault flag is

allowed to go high the A6261 will return to the open load fault

condition and will disable all regulators.

Each of the four regulators includes a limiter to ensure that

the output voltage will not rise higher than the output disable

threshold voltage below V_INwhen driven by the regulator. This

means that the voltage across the regulator will not be less than

the output disable voltage, unless it is forced by connecting the

LAx pin to VIN. However if a load becomes disconnected, the

regulator will pull the LAx pin up to the limit, which will ensure

that the voltage across the regulator, V_IN– V_LAx, is less than the

100

open load detect voltage, V_OCD

T_JM

Note that an open load may also be detected if the sum of the for-

ward voltages of the LEDs in a string is close to or greater than

the supply voltage on VIN.

T_JF

T_JL

Temperature Monitor A temperature monitor function,

included in the A6261, reduces the LED current as the silicon

junction temperature of the A6261 increases (see figure 2). By

mounting the A6261 on the same thermal substrate as the LEDs,

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

As the junction temperature of the A6261 increases, the regulated

current level is reduced, reducing the dissipated power in the

110

130

150

170

Junction Temperature, T_J(°C)

Figure 2. Temperature monitor current reduction.

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

1...4 5 678 9 10...15

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与A6261KLPTR-T相关器件

型号	品牌	描述	获取价格	数据表
A6261KLYTR-T	ALLEGRO	The A6261 is a linear, programmable current regulator providing up to 100 mA from each of	获取价格
A6262	ALLEGRO	The A6262 is a linear, programmable current regulator providing up to 100 mA from each of	获取价格
A6262KLPTR-T	ALLEGRO	The A6262 is a linear, programmable current regulator providing up to 100 mA from each of	获取价格
A6262KLYTR-T	ALLEGRO	The A6262 is a linear, programmable current regulator providing up to 100 mA from each of	获取价格
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

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