A6282

更新时间： 2024-01-28 00:12:12

品牌	Logo	应用领域
急速微 - ALLEGRO		驱动器
页数	文件大小	规格书
13页	441K
描述
16-Channel Constant-Current LED Driver

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技术参数
数据手册

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A6282 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	SOIC	包装说明：	LEAD FREE, MS-013AD, SOIC-24
针数：	24	Reach Compliance Code：	unknown
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.81	Is Samacsys：	N
数据输入模式：	SERIAL	接口集成电路类型：	LED DISPLAY DRIVER
JESD-30 代码：	R-PDSO-G24	JESD-609代码：	e3
长度：	15.4 mm	湿度敏感等级：	3
复用显示功能：	NO	功能数量：	1
区段数：	16	端子数量：	24
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP24,.4	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	电源：	3.3/5 V
认证状态：	Not Qualified	座面最大高度：	2.65 mm
子类别：	Display Drivers	最大供电电压：	5.5 V
最小供电电压：	3 V	标称供电电压：	5 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	宽度：	7.5 mm
最小 fmax：	30 MHz	Base Number Matches：	1

A6282 数据手册

16-Channel Constant-Current LED Driver

A6282

Functional Description

The maximum channel output current can be calculated as:

Normal Operation

Serial data present at the SDI (Serial Data In) input is transferred

to the shift register on the transition from logic 0 to logic 1 of the

CLK (Clock) input pulse. On succeeding CLK pulses, the register

shifts data towards the SDO (Serial Data Out) output. The serial

data must appear at the input prior to the rising edge of the CLK

waveform.

I_O(max) = (18483.1/ R_EXT) + 0.67 , for V_DD= 3.0 to 3.6 V ,

I_O(max) = (18841.2/ R_EXT) + 0.68 , for V_DD= 4.5 to 5.5 V ,

where R_EXTis the value of the user-selected external resistor,

which should not be less than 374 Ω.

A chart of the maximum per channel (OUT0 to OUT15) constant

Data present in any register is transferred to the respective latch

when the LE (Latch Enable) input is high (serial-to-parallel con-

version). The latches continue to accept new data as long as LE is

held high (level triggered).

output current, I_O(max), at various values of R_EXTis shown in

the Operating Characteristics section.

Undervoltage Lockout

The A6282 includes an internal undervoltage lockout (UVLO)

circuit that disables the outputs in the event that the logic supply

voltage drops below a minimum acceptable level. This feature

prevents the display of erroneous information, a necessary func-

tion for some critical applications. Upon recovery of the logic

supply voltage after a UVLO event, all internal shift registers and

latches are set to 0. The A6282 is then in normal mode.

Applications where the latches are bypassed (LE tied high)

¯¯¯¯

require that the OE (Output Enable) input be high during serial

¯¯¯¯

data entry. When OE is high, the output sink drivers are disabled

(off). The data stored in the latches is not affected by the state

¯¯¯¯

of OE. With OE active (low), the outputs are controlled by the

state of their respective latches.

Thermal Shutdown Protection

If the junction temperature exceeds the threshold temperature,

T_JTSD, 165°C typical, the outputs will be turned off until the junc-

tion temperature cools down through the thermal shutdown hys-

teresis, 15°C typical. The shift register and output latches register

will remain active during a thermal shutdown event. Therefore,

there is no need to reset the data in the output latches.

Setting Maximum Channel Current

The maximum output current per channel is set by a single exter-

nal resistor, REXT, which is placed between the REXT pin and

GND. The voltage on REXT, V_EXT, is set by an internal band gap

and is 1.21 V, typical.

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

1...6 7 8910 11 12 13

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与A6282相关器件

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A6282EES-T	ALLEGRO	16-Channel Constant-Current LED Driver	获取价格
A6282EESTR-T	ALLEGRO	16-Channel Constant-Current LED Driver	获取价格
A6282ELP-T	ALLEGRO	16-Channel Constant-Current LED Driver	获取价格
A6282ELPTR-T	ALLEGRO	16-Channel Constant-Current LED Driver	获取价格
A6282ELW-T	ALLEGRO	16-Channel Constant-Current LED Driver	获取价格
A6282ELWTR-T	ALLEGRO	16-Channel Constant-Current LED Driver	获取价格

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