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參數(shù)資料
| 型號(hào)： | FAN5610MPX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動(dòng)器 |
| 英文描述： | LED Driver for White, Blue or any Color LED |
| 中文描述： | LED DISPLAY DRIVER, DSO8 |
| 封裝： | 3 X 3 MM, MO-229VEEC, MLP-8 |
| 文件頁(yè)數(shù)： | 8/10頁(yè) |
| 文件大?。?/td> | 105K |
| 代理商： | FAN5610MPX |
FAN5610
PRODUCT SPECIFICATION
8
REV. 1.0.2 10/28/03
Application Examples:
Example 1: Drive low V
from single cell Li-ion
When using white or blue low V
driver’s low voltage drop, only 3.45V in V
the full 20mA LED current. Usually at 3.1V, there is still
5mA current available for the LEDs. The single cell Li-ion is
utilized in most applications like cell phones or digital still
cameras. In most cases, the Li-ion battery voltage level only
goes down to 3.0V voltage level, and not down to the full
discharge level (2.7V) before requesting the charger.
F
white or blue LEDs directly
F
LEDs, and utilizing the
IN
is needed for
– V
– V
– V
– V
DROP
F (at 20mA)
IN (at 20mA)
IN (at 5mA Typical)
~ 0.35V
< 3.1V (Low V
=V
DROP
~ 3.1V
F
= 3.45V
)
+ V
F
Where V
IN
= Single cell Li-ion Voltage
Key advantages:
No boost circuit needed for the LCD or keyboard
backlight
Driver directly connected to a Li-ion battery
No EMI, no switching noise, no boost efficiency lost, no
capacitor, and no inductor.
Example 2: Drive high V
existing bus from 4.0V to 5.5V
High V
F
white or blue LEDs have forward-voltage drop in
the range of 3.3V to 4.0V. To drive these LEDs with the max-
imum current of 20mA for maximum brightness, usually
requires a boost circuit for a single cell Li-ion voltage range.
In some cases, there is already a voltage bus in the system,
which can be utilized. Due to the low voltage drop of the
FAN5610, V
IN
needs to be only 350mV higher than the
voltage V
F
of LEDs connected to FAN5610.
F
white or blue LEDs from
– V
– V
– V
DROP
F (at 20mA)
IN(at 20mA)
≥
V
DROP
+ V
F
= 4.35V(max)
~ 0.35V
= 3.3V to 4.0V (High V
F
)
Where V
IN
= Existing bus = 5V
Key advantages:
No boost circuit needed for LCD or keyboard backlight
Driver utilizes the existing bus
Low voltage drop provides the full 20mA LED current at
the lowest possible voltage level.
D1
D2
D3
D4
V
IN
V
IN
GND
FAN5610
IN A
IN B
Micro-Controller
(Li-Ion)
D1
D2
D3
D4
V
IN
V
IN
GND
FAN5610
IN A
IN B
Microprocessor
I/O
(System Bus)
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