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參數(shù)資料
| 型號(hào)： | AAT4298 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | Five/Six Channel Push/Pull I/O Expander |
| 中文描述： | 五/六頻道推/拉I / O擴(kuò)展 |
| 文件頁數(shù)： | 14/18頁 |
| 文件大小： | 787K |
| 代理商： | AAT4298 |
AAT4296/98
Five/Six Channel Push/Pull I/O Expander
14
4296.2006.12.1.3
Figure 5: Infrared, Bluetooth, RGB, and Backlighting Control.
IN
EN/SET
OUT2
GND
OUT6
OUT5
OUT4
OUT3
OUT1
AAT4296
R
G
B
5V
A series of
pulses
Bluetooth
Device
EN
Infrared
Device
EN
Backlighting
Driving LED Loads
The AAT4296 and AAT4298 can be used to drive
LEDs or other applications with light load current
requirements. LED applications may include main
and sub-LCD display backlighting, camera photo-
flash applications, color (RGB) LEDs, and infrared
(IR) diodes for remotes. In series with LEDs, bal-
last resistors must be used to limit the LED current.
The LED current will vary with supply voltage and
LED forward voltage. Most types of LEDs have for-
ward voltage specifications ranging from 2.0V to
5.0V. Calculate the necessary ballast resistor value
from the following formula:
Where:
R
LED
is the resistance of resistor to be placed in
series with the LED (
Ω
).
V
IN
is the input supply voltage to the device (V).
V
F
is the forward voltage of the LED (V).
R
DS(ON)
is the resistance of the switch when it is
turned on (
Ω
).
I
LED
is the desired operating current of the LED (A).
R
LED
=
- R
DS(ON)
(V
IN
- V
F
)
I
LED
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| AAT4298IJQ-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Five/Six Channel Push/Pull I/O Expander |
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| AAT4298ITP-T1PEG | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Five/Six Channel Push/Pull I/O Expander |
| AAT4601 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1.5A Current Limited P-Channel Switch |
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