參數(shù)資料
型號(hào)： MAX1739EEP
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Wide Brightness Range CCFL Backlight Controllers
中文描述： FLUORESCENT LIGHT CONTROLLER, 64 kHz SWITCHING FREQ-MAX, PDSO20
封裝： 0.150 INCH, 0.025 INCH PITCH, QSOP-20
文件頁數(shù)： 10/26頁
文件大?。?/td> 444K
代理商： MAX1739EEP
M
Wide Brightness Range
CCFL Backlight Controllers
10
______________________________________________________________________________________
Detailed Description
The MAX1739/MAX1839 regulate the brightness of a
CCFL in three ways:
1) Linearly controlling the lamp current.
2) Digitally pulse-width modulating (or chopping) the
lamp current (DPWM).
3) Using both methods simultaneously for widest dim-
ming range.
DPWM is implemented by pulse-width modulating the
lamp current at a rate faster than the human eye can
detect. Figure 1 shows the current and voltage wave-
forms for the three operating modes with the brightness
control set to 50% of full scale.
The MAX1739/MAX1839 include a 5.3V linear regulator
to power most of the internal circuitry, drivers for the
buck and Royer switches, and the synchronizable
DPWM oscillator. The MAX1739/MAX1839 are very flex-
ible and include a variety of operating modes, an ana-
log interface, an SMBus interface (MAX1739 only), a
shutdown mode, lamp-out detection, and buck-switch
short detection.
Figure 1. Brightness Control Methods
V
MINDAC
= 0
V
CTL
= V
CRF
/2
or BRIGHT[4:0] = 10,000
(DAC SET TO MIDSCALE)
EFFECTIVE BRIGHTNESS IS:
50% IN CONTINUOUS AND DPWM CONTROL
25% IN COMBINED CONTROL
V
CTAP
V
CSAV
CURRENT + DPWM CONTROL
CONTINUOUS CURRENT CONTROL
DPWM CONTROL
V
CTAP
TRANSFORMER
VOLTAGE
V
CSAV
LAMP CURRENT
相關(guān)PDF資料
PDF描述
MAX1839 Wide Brightness Range CCFL Backlight Controllers
MAX1839EEP Wide Brightness Range CCFL Backlight Controllers
MAX1740 Digital Signal Processors 144-LQFP
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1739EEP+ 功能描述:顯示驅(qū)動(dòng)器和控制器 CCFL Backlight Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel
MAX1739EEP+T 功能描述:顯示驅(qū)動(dòng)器和控制器 CCFL Backlight Controller RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel
MAX1739EEP-T 功能描述:顯示驅(qū)動(dòng)器和控制器 RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel
MAX1739EVKIT 功能描述:電源管理IC開發(fā)工具 MAX1739 Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
MAX173BCNG 制造商:Maxim Integrated Products 功能描述:
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