參數(shù)資料
型號(hào)： A6277
廠商： Allegro MicroSystems, Inc.
元件分類： LED驅(qū)動(dòng)器
英文描述： 8-BIT SERIAL-INPUT, CONSTANTCURRENT LATCHED LED DRIVER
中文描述： 8位串行輸入，CONSTANTCURRENT鎖存LED驅(qū)動(dòng)
文件頁數(shù)： 10/12頁
文件大?。?/td> 203K
代理商： A6277
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
6277
8-BIT SERIAL-INPUT,
CONSTANT-CURRENT
LATCHED LED DRIVER
10
The load current per bit (I
O
) is set by the external resistor
(R
EXT
) as shown in the figure below.
Package Power Dissipation (P
D
).
The maximum allow-
able package power dissipation is determined as
P
D
(max) = (150 - T
A
)/R
θ
JA
.
The actual package power dissipation is
P
D
(act) = dc(V
CE
I
O
8) + (V
DD
I
DD
).
When the load supply voltage is greater than 3 V to 5 V,
considering the package power dissipating limits of these
devices, or if P
D
(act) > P
D
(max), an external voltage
reducer (V
DROP
) should be used.
Load Supply Voltage (V
LED
).
These devices are de-
signed to operate with driver voltage drops (V
CE
) of 0.4 V
to 0.7 V with LED forward voltages (V
F
) of 1.2 V to
4.0 V. If higher voltages are dropped across the driver,
package power dissipation will be increased significantly.
To minimize package power dissipation, it is recom-
mended to use the lowest possible load supply voltage or
to set any series dropping voltage (V
DROP
) as
V
DROP
= V
LED
- V
F
- V
CE
with V
DROP
= I
o
R
DROP
for a single driver, or a Zener
diode (V
Z
), or a series string of diodes (approximately
0.7 V per diode) for a group of drivers. If the available
voltage source will cause unacceptable dissipation and
series resistors or diode(s) are undesirable, a regulator
such as the Sanken Series SAI or Series SI can be used to
provide supply voltages as low as 3.3 V.
For reference, typical LED forward voltages are:
Blue
Green
Yellow
Amber
Red
Infrared
3.0 – 4.0 V
1.8 – 2.2 V
2.0 – 2.1 V
1.9 – 2.65 V
1.6 – 2.25 V
1.2 – 1.5 V
Pattern Layout.
This device has separate logic-ground
and power-ground terminals. If ground pattern layout
contains large common-mode resistance, and the voltage
between the system ground and the LATCH ENABLE or
CLOCK terminals exceeds 2.5 V (because of switching
noise), these devices may not operate correctly.
Dwg. EP-064
VLED
VDROP
VF
VCE
Applications Information
300
500
700
1 k
2 k
CURRENT-CONTROL RESISTANCE, R
EXT
IN OHMS
100
0
100
Dwg. GP-061-1
O
5 k
200
3 k
20
40
60
80
V
CE
= 0.7 V
120
140
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A6277EA 8-BIT SERIAL-INPUT, CONSTANTCURRENT LATCHED LED DRIVER
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
A6277EA 功能描述:IC LED DRIVER LINEAR 20-DIP RoHS:否 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?PWM，切換式電容器（充電泵） 輸出數(shù):1 內(nèi)部驅(qū)動(dòng)器:是 類型 - 主要:背光 類型 - 次要:白色 LED 頻率:642kHz 電源電壓:2.7 V ~ 5.5 V 輸出電壓:5V 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-VSON 包裝:剪切帶 (CT) 工作溫度:-30°C ~ 85°C 產(chǎn)品目錄頁面:1371 (CN2011-ZH PDF) 其它名稱:BD1603NUV-E2CT
A6277EA-T 功能描述:IC LED DRIVER LINEAR 20-DIP RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?PWM，切換式電容器（充電泵） 輸出數(shù):1 內(nèi)部驅(qū)動(dòng)器:是 類型 - 主要:背光 類型 - 次要:白色 LED 頻率:642kHz 電源電壓:2.7 V ~ 5.5 V 輸出電壓:5V 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-VSON 包裝:剪切帶 (CT) 工作溫度:-30°C ~ 85°C 產(chǎn)品目錄頁面:1371 (CN2011-ZH PDF) 其它名稱:BD1603NUV-E2CT
A6277ELW 功能描述:IC LED DRIVER LINEAR 20-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?PWM，切換式電容器（充電泵） 輸出數(shù):1 內(nèi)部驅(qū)動(dòng)器:是 類型 - 主要:背光 類型 - 次要:白色 LED 頻率:642kHz 電源電壓:2.7 V ~ 5.5 V 輸出電壓:5V 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-VSON 包裝:剪切帶 (CT) 工作溫度:-30°C ~ 85°C 產(chǎn)品目錄頁面:1371 (CN2011-ZH PDF) 其它名稱:BD1603NUV-E2CT
A6277ELW-T 功能描述:IC LED DRIVER LINEAR 20-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動(dòng)器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?PWM，切換式電容器（充電泵） 輸出數(shù):1 內(nèi)部驅(qū)動(dòng)器:是 類型 - 主要:背光 類型 - 次要:白色 LED 頻率:642kHz 電源電壓:2.7 V ~ 5.5 V 輸出電壓:5V 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-VSON 包裝:剪切帶 (CT) 工作溫度:-30°C ~ 85°C 產(chǎn)品目錄頁面:1371 (CN2011-ZH PDF) 其它名稱:BD1603NUV-E2CT
A6277ELW-T 制造商:Allegro MicroSystems 功能描述:LED Driver IC
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