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參數(shù)資料
| 型號： | MAX1889 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | Fixed-Point Digital Signal Processor 256-BGA |
| 中文描述： | 三輸出TFT LCD電源，帶有故障保護(hù) |
| 文件頁數(shù)： | 1/32頁 |
| 文件大?。?/td> | 796K |
| 代理商： | MAX1889 |
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General Description
The MAX1889 provides the three regulated output volt-
ages required for active matrix, thin-film transistor liquid
crystal displays (TFT LCDs). It combines a high-perfor-
mance step-up regulator with two linear-regulator con-
trollers and multiple levels of protection circuitry for a
complete power-supply system.
The main DC-DC converter is a high-frequency
(500kHz/1MHz), current-mode step-up regulator with
an integrated N-channel power MOSFET that allows the
use of ultra-small inductors and ceramic capacitors.
With its high closed-loop bandwidth performance, the
MAX1889 provides fast transient response to pulsed
loads while operating with efficiencies over 85%. The
positive and negative linear-regulator controllers post-
regulate charge-pump outputs for TFT gate-on and
gate-off supplies.
The MAX1889 has a unique input switch control that
can replace the typical input fuse by disconnecting the
load from the input supply when a fault is detected.
The fault detector monitors all three regulated output
voltages and can monitor current from the input supply
as well. Additionally, the MAX1889 enters thermal shut-
down when its overtemperature threshold is reached.
The MAX1889 undervoltage lockout is set at 2.5V (max)
to allow the input supply to droop under pulsed load
conditions while avoiding any unexpected behavior
when its input voltage dips momentarily. Also, the built-
in soft-start and cycle-by-cycle current limiting prevent
input surge currents during power-up.
The MAX1889 is available in a 16-pin thin QFN pack-
age with a maximum thickness of 0.8mm for ultra-thin
LCD panel design.
Applications
Notebook Computer Displays
LCD Monitors
Car Navigation Displays
Features
o
High-Performance Step-Up Regulator
Fast Transient Response
Current-Mode Control Architecture
Built-In High-Efficiency N-Channel Power
MOSFET
Current-Limit Comparator
>85% Efficiency
Selectable Switching Frequency
(500kHz/1MHz)
Internal Soft-Start
o
Positive Linear-Regulator Controller
o
Negative Linear-Regulator Controller
o
Triple-Level Protection Against Smoke or Fire
Input Switch Replaces Input Fuse
Output Overload Detection with Timer Latch
Thermal Shutdown
o
2.7V to 5.5V Input Operating Range
o
Ultra-Small External Components
o
1μA Shutdown Current (max)
o
1mA Quiescent Current (max)
o
Ultra-Thin 16-Pin QFN Package
(0.8mm Maximum Thickness)
M
Triple-Output TFT LCD Power Supply
with Fault Protection
________________________________________________________________
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
16
1
2
3
4
12
11
10
9
15
14
13
5
6
7
8
I
G
O
O
TGND
LX
FREQ
FBP
PGND
GND
REF
F
F
D
D
SHDN
TOP VIEW
MAX1889
THIN QFN
(5mm x 5mm)
Pin Configuration
19-2485; Rev 1; 10/02
PART
TEMP RANGE
- 40°C to + 85° C 16 Thi n Q FN ( 5m m
5m m
- 40°C to + 85° C 16 QFN ( 5m m
5m m
*
Future product—Contact factory for availability.
PIN-PACKAGE
MAX1889ETE
MAX1889EGE*
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|---|---|
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| MAX1896EUT-T | Fixed-Point Digital Signal Processor 532-FCBGA |
| MAX1898 | Fixed-Point Digital Signal Processor 532-FCBGA |
| MAX1898EUB41 | Linear Charger for Single-Cell Li Battery |
| MAX1898EUB42 | Linear Charger for Single-Cell Li Battery |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1889EGE | 制造商:Maxim Integrated Products 功能描述: |
| MAX1889EGE+ | 制造商:Maxim Integrated Products 功能描述:TRIPLE-OUTPUT TFT LCD POWER SUPPLY WITH FAULT PROTECTION - Rail/Tube |
| MAX1889ETE | 功能描述:LCD 驅(qū)動器 RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)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 |
| MAX1889ETE+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Quad-Output TFT LCD Power Supply RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(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 |
| MAX1889ETE+T | 功能描述:LCD 驅(qū)動器 Quad-Output TFT LCD Power Supply RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)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 |
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