參數(shù)資料
型號： MAX1739-MAX1839
廠商： Maxim Integrated Products, Inc.
英文描述： Wide Brightness Range CCFL Backlight Controllers
中文描述： 寬范圍亮度CCFL背光控制器
文件頁數(shù)： 9/26頁
文件大?。?/td> 444K
代理商： MAX1739-MAX1839
M
Wide Brightness Range
CCFL Backlight Controllers
_______________________________________________________________________________________
9
NAME
PIN
MAX1739
REF
MAX1839
REF
FUNCTION
1
2V Reference Output. Bypass to GND with 0.1
μ
F. Forced low during shutdown.
2
MINDAC
MINDAC
DAC Zero-Scale Input. VMINDAC sets the DAC
’
s minimum scale output voltage.
Disable DPWM by connecting MINDAC to VL.
3
CCI
CCI
GMI Output. Output of the current loop GMI amplifier that regulates the CCFL current.
Typically bypass to GND with 0.1
μ
F
4
CCV
CCV
GMV Output. Output of the voltage loop GMV amplifier that regulates the maximum
average primary transformer voltage. Typically bypass to GND with 3300p F
5
SH
/SUS
SH
Logic Low Shutdown Input in Analog Interface Mode. SMBus suspends input in SMBus
interface mode (MAX1739 only).
6
CRF/SDA
CRF
5- Bi AD C Reference Input in Anal og Inter ace Mod e. Bypass to GN D wi h 0.1
μ
F. SM Bus seri al
d ata i np ut/op en- d ai n outp ut ( MAX 1739 onl y) i n S M Bus i nter ace m od e.
7
CTL/SCL
CTL
CCFL Brightness Control Input in Analog Interface Mode. SMBus serial clock input
(MAX1739 only) in SMBus interface mode.
8
MODE
MODE
Interface Selection Input and Sync Input for DPWM Chopping (see
Synchronizing the
DPWM Frequency
). The average voltage on the MODE pin selects one of three CCFL
brightness control interfaces:
1) MODE = VL, enables SMBus serial interface (MAX1739 only).
2) MODE = GND, enables the analog interface (positive scale analog interface mode);
VCTL/SCL = 0 means minimum brightness.
3) MODE = REF, enables the analog interface (negative scale analog interface mode);
VCTL/SCL = 0 means maximum brightness.
Current-Sense Input. Input to the GMI error amplifier that drives CCI.
Center-Tap Voltage Feedback Input. The average VCTFB is limited to 0.6V.
Royer Synchronization Input. Falling edges on SYNC force DH on and toggle the DL1
and DL2 drivers. Connect directly to the Royer center tap.
9
10
CSAV
CTFB
CSAV
CTFB
11
SYNC
SYNC
12
DL2
DL2
Low-Side N-Channel MOSFET 2 Gate Drive. Drives the Royer oscillator switch. DL1 and
DL2 have make-before-break switching, where at least one is always on. Falling edges
on SYNC toggle DL1 and DL2 and turn DH on.
13
DL1
DL1
Low-Side N-Channel MOSFET 1 Gate Drive
14
CS
CS
Current-Sense Input (Current Limit). The current-mode regulator terminates the switch
cycle when VCS exceeds (VREF - VCCI).
System Ground
15
GND
GND
16
VL
VL
5.3V Linear Regulator Output. Supply voltage for most of the internal circuits. Bypass
with 1
μ
F capacitor to GND. Can be connected to VBATT if VBATT < 5.5V.
17
BST
BST
High-Side Driver Bootstrap Input. Connect through a diode to VL and bypass with 0.1
μ
F
capacitor to LX.
18
19
20
LX
DH
BATT
LX
DH
BATT
High-Side Driver Ground Input
High-Side Gate Driver Output. Falling edges on SYNC turn on DH.
Supply Input. Input to the internal 5.3V linear regulator that powers the chip.
Pin Description
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參數(shù)描述
MAX173BCNG 制造商:Maxim Integrated Products 功能描述:
MAX173C/D 功能描述:模數(shù)轉(zhuǎn)換器 - ADC CMOS 5us 10-Bit Complete ADC with Voltage Reference RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX173CNG 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX173CNG+ 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10-Bit 200ksps 5.25V- Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
MAX173CWG 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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