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參數(shù)資料
| 型號(hào)： | FAN5608HMPX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動(dòng)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(yè)數(shù)： | 1/17頁(yè) |
| 文件大?。?/td> | 206K |
| 代理商： | FAN5608HMPX |
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www.fairchildsemi.com
REV. 1.0.3 6/28/04
Features
Two Independent Channels Drive up to Six LEDs per
Channel
Adaptive Output Voltage Drive to Maximize Efficiency
PWM/PFM Mode of Operation of the Boost Circuit
Up to 85% Efficiency
Up to 2
×
20mA Output
Two Built-in DACs for Independent (Digital) Brightness
Control for Both Channels
LED’s Current Can be Duty-Cycle-Modulated between
0 to 20mA
Digital, Analog, and PWM Brightness Control
2.7V to 5V Input Voltage Range
0.5MHz Operating Frequency (8MHz internal clock)
Soft Start
Low Shutdown Current: I
CC
LED Short Circuit Protection
Minimal External Components Needed
Available in space saving 8-lead and 12-lead MLP
Packages.
< 1
μ
A
Applications
Cell Phones
Handheld Computers
PDAs, DSCs, MP3 Players
Keyboard Backlights
LED Displays
Description
The FAN5608 LED driver generates regulated output cur-
rents from a battery with input voltage varying between 2.7V
to 5V. An internal NMOS switch drives an external inductor,
and a Schottky diode delivers the inductor’s stored energy to
the load. Proprietary internal circuitry continuously monitors
the currrent on both strings and automatically adjusts the
generated output DC voltage to the lowest minimum value
required by the LEDs string with the highest summarized
forward voltage. This adaptive nature of the FAN5608
ensures operation at the highest possible efficiency. Soft start
circuitry prevents excessive current drawn from the supply
during power on. Any number of LEDs can be connected in
series as long as the summed forward voltages do not exceed
the specified operating output voltage range. Although it is
not required to have an equal number of LEDs connected in
series within each branch, the highest efficiency and best
current regulation is always achieved when an equal number
of LEDs are serially connected.
In the FAN5608 device, two internal two-bit D/A converters
provide independent programmability of each output channel
current. Analog programming of the output current is
also possible in the FAN5608. To do this, ground the "B"
pins and connect a resistor between the "A" pins and a
fixed supply voltage. The output current can then be
programmed to any desired value within its specified range.
The FAN5608DMPX/FAN5608MPX version uses a single
FAN5608
Serial/Parallel LED Driver with Current-Regulated,
Step-Up DC/DC Converter
Typical Application
Digital Brightness Control
NN
NC
2.7V to 5V
C
IN
L = 4.7
μ
H
V
IN
A1
B1
A2
B2
IND
IND
GND
CH2
CH1
V
OUT
F
DAC Input For CH1
DAC Input For CH2
4.7
μ
F
V
OUT
2.7V to 5V
L = 4.7
μ
H
V
IN
A1
B1
A2
B2
IND
IND
GND
CH2
CH1
V
OUT
F
DAC Input For CH1
DAC Input For CH2
4.7
μ
F
NC
NC
C
IN
4X4mm MLP-12 Package
with internal Schottky diode
Order Code: FAN5608DHMPX
4X4mm MLP-12 Package
with external Schottky diode
Order Code: FAN5608HMPX
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FAN5609 | LED Driver with Adaptive Charge Pump DC/DC Converter |
| FAN5609MPX | TERMINAL |
| FAN5609MTCX | CLIPS |
| FAN5610MPX | LED Driver for White, Blue or any Color LED |
| FAN5610 | LED Driver for White, Blue or any Color LED |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FAN5608MPX | 功能描述:LED照明驅(qū)動(dòng)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(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| FAN5608MPX_Q | 功能描述:LED照明驅(qū)動(dòng)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(fēng)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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