參數(shù)資料
型號(hào)： MAX1839EEP
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(yè)數(shù)： 24/26頁(yè)
文件大小： 444K
代理商： MAX1839EEP
M
Wide Brightness Range
CCFL Backlight Controllers
24
______________________________________________________________________________________
Status Register
[STATUS1–STATUS0] (POR = 0b11)
The status register returns information on fault condi-
tions. If a lamp is not connected to the secondary of the
transformer, the MAX1739 will detect that the lamp cur-
rent has not exceeded the CSAV detection threshold
and after 2 seconds will clear the STATUS1 bit (see
Lamp-Out Detection
). The STATUS1 bit is latched; i.e.,
it will remain 0 even if the lamp-out condition goes
away. When STATUS1 = 0, the lamp is forced off. STA-
TUS0 reports 1 as long as no overcurrent conditions
are detected. If an overcurrent condition is detected in
any given DPWM period, STATUS0 is cleared for the
duration of the following DPWM period. If an overcur-
rent condition is not detected in any given DPWM peri-
od, STATUS0 is set for the duration of the following dig-
ital DPWM period. Forcing the CCFL lamp off by
entering shutdown, writing to the mode register, or by
toggling
SH
/SUS sets STATUS1.
ID Registers
The ID registers return information on the manufacturer,
the chip ID, and the chip revision number. The
MAX1739 is the first-generation advanced CCFL con-
troller, and its ChipRev is 0x00. Reading from the MfgID
register returns 0x4D, which is the ASCII code for
“
M
”
(for Maxim); the ChipID register returns 0x96. Writing to
these registers has no effect.
BIT
NAME
POR
STATE
DESCRIPTION
2
SHMD2
0
SHMD2 = 1 forces the lamp off and sets STATUS1. SHMD2 = 0 allows the lamp to operate, though it
may still be shut down by the
SH/
SUS pin (depending on the state of SHMD1 and SHMD0).
1
SHMD1
0
When
SH
/SUS = 0, this bit has no effect.
SH
/SUS = 1 and SHMD1 = 1 forces the lamp off and sets
STATUS1.
SH
/SUS = 1 and SHMD1 = 0 allow the lamp to operate, though it may still be shut down
by the SHMD2 bit.
0
SHMD0
1
When
SH
/SUS = 1, this bit has no effect.
SH
/SUS = 0 and SHMD0 = 1 forces the lamp off and sets
STATUS1.
SH
/SUS = 0 and SHMD0 = 0 allows the lamp to operate, though it may still be shut down
by the SHMD2 bit.
Table 7. SHMD Register Bit Descriptions
SH
/SUS
0
0
1
1
X
SHMD2
0
0
0
0
1
SHMD1
X
X
0
1
X
SHMD0
0
1
X
X
X
OPERATING MODE
Operate
Shutdown, STATUS1 set
Operate
Shutdown, STATUS1 set
Shutdown, STATUS1 set
Table 8.
SH
/SUS and SHMD Register Truth Table
BIT
NAME
POR
STATE
DESCRIPTION
1
STATUS1
1
STATUS1 = 0 means that a lamp-out condition has been detected. The STATUS1 bit stays clear
even after the lamp-out condition has gone away. The only way to set STATUS1 is to shut off the
lamp by programming the mode register or by toggling
SH
/SUS.
0
STATUS0
1
STATUS0 = 0 means that an overcurrent condition was detected during the previous digital PWM
period. STATUS0 = 1 means that no overcurrent condition was detected during the previous digital
PWM period.
Table 9. Status Register Bit Descriptions (Read Only/Writes Have No Effect)
X = Don
’
t care
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1839EEP+ 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
MAX1839EEP+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
MAX1839EEP-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
MAX183ACNG 功能描述:模數(shù)轉(zhuǎn)換器 - 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
MAX183ACNG+ 功能描述:模數(shù)轉(zhuǎn)換器 - 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
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