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參數資料
| 型號： | FAN5608HMPX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅動器 |
| 英文描述： | Serial/Parallel LED Driver with Current-Regulated, Step-Up DC/DC Converter |
| 中文描述： | LED DISPLAY DRIVER, QCC12 |
| 封裝： | 4 X 4 MM, MO-220WGGB, MLP-12 |
| 文件頁數： | 5/17頁 |
| 文件大小： | 206K |
| 代理商： | FAN5608HMPX |
FAN5608
PRODUCT SPECIFICATION
REV. 1.0.3 6/28/04
5
Block Diagram
COIL DRIVER
DBB
START-UP
POWER GOOD
LINEAR REGULATOR
LINEAR REGULATOR
OSC
W_OR
REF
REF CH1
REF CH2
DAC1
DAC2
BG
VOUT
VIN
GND
B1
A1
CH1
IND
CH2
B2
A2
IND
Note:
In the 8-pin version (analog version only), pins B1 and B2 are omitted.
Circuit Description
When the input voltage is connected to V
turned on, the bandgap reference acquires its nominal volt-
age and the soft-start cycle begins. Once “power good” is
achieved (0.5mA in the diodes), the soft-start cycle stops and
the boost voltage increases to generate the desired current
selected by the input control pins. If the second channel is
not selected, its output will go high to about V
diodes are turned off.
IN
pin, the system is
IN
, and the
The FAN5608 DC/DC converter automatically adjusts its
internal duty cycle to achieve high efficiency. It provides
tightly regulated output currents for the LEDs. An internal
circuit determines which LED string requires the highest
voltage in order to sustain the pre-set current levels, and
adjusts the boost regulator accordingly.
To maintain the regulated current at the selected value, the
difference in the number of LEDs between branches should
not exceed one. If only one branch is used, another branch
should be disabled, connecting the corresponding DAC
inputs to low. If the output external capacitor is shorted, the
Schottky diode can be damaged, therefore such a condition
should be avoided.
LED Brightness Control
The control inputs are A1, B1 for CH1 and A2, B2 for CH2.
B1 and B2 are digital inputs, thus they require LOW (GND)
and HIGH (V
CC
) control signals. In analog mode, A1 and A2
are connected to an external stable voltage source via an
external resistor, and B1 and B2 inputs are connected to
ground. The current flowing through the resistor is scaled by
a factor of approximately 1000.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN5608MPX | 功能描述:LED照明驅動器 LED Driver Serial/Parallel RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| FAN5608MPX_Q | 功能描述:LED照明驅動器 LED Driver Serial/Parallel RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:SO-16N |
| FAN5609 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:LED Driver with Adaptive Charge Pump DC/DC Converter |
| FAN5609_AFC3086B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN5609_AGC3026B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
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