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參數(shù)資料
| 型號(hào)： | MAX1729 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類(lèi)： | 數(shù)字信號(hào)處理 |
| 英文描述： | Replaced by TMS320VC5506 : Digital Signal Processors 100-LQFP 0 to 0 |
| 中文描述： | ECB及LCD偏置電源，帶有精確的輸出電壓及溫度補(bǔ)償 |
| 文件頁(yè)數(shù)： | 1/12頁(yè) |
| 文件大?。?/td> | 158K |
| 代理商： | MAX1729 |
EVALUATION KIT
FOLLOWS DATA SHEET
ECB and LCD Display Bias Supply with Accurate
Output Voltage and Temperature Compensation
General Desc ription
The MAX1729 micropower step-up/step-down DC-DC
converter is ideally suited for electrically controlled bire-
fringence (ECB) and liquid-crystal-display (LCD) bias-
supply generation. It provides step-up/step-down
voltage conversion and reduces output ripple by using
a step-up DC-DC converter followed by a linear regula-
tor. This architecture permits a physically smaller induc-
tor than those used in competing SEPIC and flyback
topologies. This device features low quiescent current
(67μA typical). A logic-controlled shutdown mode fur-
ther reduces quiescent current to 0.4μA typical.
The MAX1729 features an input that dynamically
adjusts the output voltage to control display color or
contrast. It offers two feedback modes: internal and
external. Internal feedback mode allows output volt-
ages between 2.5V and 16V, and is specifically
designed to hold temperature drift to ±11ppm/°C.
External feedback mode allows the MAX1729 output
voltage range to be tailored for various displays.
An on-chip temperature sensor with a positive tempera-
ture coefficient provides compensation for LCD/ECB
display temperature characteristics. In internal feed-
back mode, the buffered temperature sensor output is
read and used to adjust the output voltage via a digital
control signal. External feedback mode features an
additional compensation method in which the tempera-
ture output is summed directly into the feedback net-
work to provide first-order negative temperature
compensation of the output voltage. The MAX1729 is
available in the space-saving 10-pin μMAX package.
Applic ations
ECB Display Bias & Color Adjustment
LCD Display Bias & Contrast Adjustment
Cellular Phones
Personal Digital Assistants
Features
o
High-Accuracy Reference Voltage (±1%)
o
±11ppm/°C Output Voltage Drift
o
On-Chip Temperature Sensor Output
o
Accurate Voltage and Temperature Provide:
Consistent ECB Colors
Consistent LCD Gray-Scale Contrast
o
+2.7V to +5.5V Input Voltage Range
o
Output Voltage Range
+2.5V to +16V in Internal Feedback Mode
Programmable in External Feedback Mode
o
Dynamic Control of the Output Voltage
o
67μA Supply Current
o
0.4μA Shutdown Current
o
10-Pin μMAX Package (1.09mm max height)
o
Evaluation Kit Available (MAX1729EVKIT)
M
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1
PS
OUT
FB
COMP
LX
TC
CTLIN
V
OUT
+2.5V to +16V
DIGITAL
PWM
CONTROLLER
GND
IN
V
IN
2.7V to 5.5V
MAX1729
REF
ADC
Typic al Operating Circ uit
19-1406; Rev 1; 1/99
PART
MAX1729EUB
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
10 μMAX
Ordering Information
Pin Configuration
1
2
3
4
5
10
9
8
7
6
GND
LX
PS
OUT
COMP
REF
TC
IN
MAX1729
μ
MAX
TOP VIEW
CTLIN
FB
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| MAX1729EUB | ECB and LCD Display Bias Supply with Accurate Output Voltage and Temperature Compensation |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1729EUB | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 ECB & LCD Display Bias Supply RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1729EUB-T | 功能描述:直流/直流開(kāi)關(guān)轉(zhuǎn)換器 ECB & LCD Display Bias Supply RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開(kāi)關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX172ACNG | 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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 |
| MAX172ACNG+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12-Bit 100ksps 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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 |
| MAX172ACWG | 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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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