参数资料
型号: A6280EESTR-T
厂商: Allegro Microsystems Inc
文件页数: 10/14页
文件大小: 0K
描述: IC LED DRIVER PWM CONTROL 16-QFN
标准包装: 1
恒定电流:
拓扑: 线性,PWM
输出数: 3
内部驱动器:
类型 - 主要: 通用
类型 - 次要: RGB
频率: 5MHz
电源电压: 4.75 V ~ 17 V
输出电压: 1 V ~ 3 V
安装类型: 表面贴装
封装/外壳: 16-WFQFN 裸露焊盘
供应商设备封装: 16-QFN/MLP 裸露焊盘(3x3)
包装: 标准包装
工作温度: -40°C ~ 85°C
产品目录页面: 1141 (CN2011-ZH PDF)
其它名称: 620-1179-6
A6280
3-Channel Constant-Current LED Driver
with Programmable PWM Control
Undervoltage Lockout
The A6280 includes an internal undervoltage lockout (UVLO)
circuit that disables the driver outputs in the event of the logic
supply voltage dropping below a minimum acceptable level. This
prevents the display of erroneous information, a necessary func-
tion for some critical applications. The shift register will not shift
any data in a UVLO condition. Upon recovery of the logic supply
voltage and on power up, the internal shift register and all latches
will be set to zero.
Ballast Resistors
The voltage on the outputs should be kept in the range 1 to 3 V.
If the voltage goes below 1V, the current will begin to rolloff as
the driver runs out of headroom. At V OUT above 3 V, the power
dissipation may become a problem, as each output contributes
V OUT × I LED of power loss in the output sink driver. Typically the
power supply nominal voltage is chosen to keep the output volt-
age in this range. Alternatively, series resistors can be added to
dissipate the extra power and keep the output voltage within the
recommended range.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
9
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