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參數資料
| 型號： | MAX8740 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | TFT-LCD Step-Up DC-DC Converter |
| 中文描述： | TFT-LCD升壓型DC-DC轉換器 |
| 文件頁數： | 1/12頁 |
| 文件大小： | 341K |
| 代理商： | MAX8740 |
General Description
The MAX8740 is a high-performance, step-up DC-DC
converter that provides a regulated supply voltage for
active-matrix, thin-film transistor (TFT), liquid-crystal
displays (LCDs). The MAX8740 incorporates current-
mode, fixed-frequency, pulse-width modulation (PWM)
circuitry with a built-in n-channel power MOSFET to
achieve high efficiency and fast transient response.
Users can select 640kHz or 1.2MHz operation using a
logic input pin (FREQ). The high switching frequencies
allow the use of ultra-small inductors and low-ESR
ceramic capacitors. The current-mode architecture pro-
vides fast transient response to pulsed loads. A com-
pensation pin (COMP) gives users flexibility in adjusting
loop dynamics. The 30V internal MOSFET can generate
output voltages up to 28V from a 2.6V and 5.5V input
voltage range. Soft-start slowly ramps the input current
and is programmed with an external capacitor.
The MAX8740 is available in a 10-pin thin DFN package.
Applications
Notebook Computer Displays
LCD Monitor Panels
Features
90% Efficiency
Adjustable Output from V
IN
to 28V
2.6V to 5.5V Input Supply Range
Input Supply Undervoltage Lockout
Pin-Programmable 640kHz/1.2MHz Switching
Frequency
Programmable Soft-Start
0.1μA Shutdown Current
Small, 10-Pin Thin DFN Package
M
TFT-LCD Step-Up DC-DC Converter
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
Ordering Information
19-3698; Rev 0; 5/05
EVALUATION KIT
AVAILABLE
PART
TEMP RANGE
-40
°
C to +85
°
C
PIN-PACKAGE
10 TDFN 3mm x 3mm
MAX8740ETB
C
1
F
2
3
G
4
G
5
10
9
8
7
6
S
S
F
L
L
I
MAX8740
TOP VIEW
THIN DFN
3mm x 3mm
Pin Configuration
LX
LX
FB
GND
GND
FREQ
IN
COMP
SS
1
4
5
2
3
9
8
6
7
10
V
OUT
V
IN
2.6V TO 5.5V
SHDN
MAX8740
Minimal Operating Circuit
相關PDF資料 |
PDF描述 |
|---|---|
| MAX8740ETB | TFT-LCD Step-Up DC-DC Converter |
| MAX878LCPA | Analog IC |
| MAX8710 | LCD display panel power supply TFT Monitor TV |
| MAX8711 | LCD display panel power supply TFT Monitor TV |
| MAX8712 | LCD display panel power supply TFT Monitor TV |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX8740ETB | 制造商:Maxim Integrated Products 功能描述:LOW COST LCD MONITOR PANEL POWER SU - Rail/Tube |
| MAX8740ETB+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
| MAX8740ETB+T | 功能描述:LCD 驅動器 TFT-LCD Step-Up DC/DC Converter RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| MAX8740ETB-T | 功能描述:LCD 驅動器 RoHS:否 制造商:Maxim Integrated 數位數量:4.5 片段數量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| MAX8740EUB+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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