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MAX753CPE Datasheet

  • MAX753CPE

  • Maxim Integrated Products [CCFL Backlight and LCD Contrast ...

  • MAXIM   MAXIM

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19-0197; Rev 1; 1/95
CCFL Backlight and
LCD Contrast Controllers
_______________General Description
The MAX753/MAX754 drive cold-cathode fluorescent
lamps (CCFLs) and provide the LCD backplane bias
(contrast) power for color or monochrome LCD panels.
These ICs are designed specifically for backlit note-
book-computer applications.
Both the backplane bias and the CCFL supply can be
shut down independently. When both sections are shut
down, supply current drops to 25碌A(chǔ). The LCD contrast
and CCFL brightness can be adjusted by clocking sep-
arate digital inputs or using external potentiometers.
LCD contrast and backlight brightness settings are pre-
served in their respective counters while in shutdown.
On power-up, the LCD contrast counter and CCFL
brightness counter are set to one-half scale.
The ICs are powered from a regulated 5V supply. The
magnetics are connected directly to the battery, for
maximum power efficiency.
The CCFL driver uses a Royer-type resonant architec-
ture. It can provide from 100mW to 6W of power to one
or two tubes. The MAX753 provides a negative LCD
bias voltage; the MAX754 provides a positive LCD bias
voltage.
____________________________Features
o
Drives Backplane and Backlight
o
4V to 30V Battery Voltage Range
o
Low 500碌A(chǔ) Supply Current
o
Digital or Potentiometer Control of CCFL
Brightness and LCD Bias Voltage
o
Negative LCD Contrast (MAX753)
o
Positive LCD Contrast (MAX754)
o
Independent Shutdown of Backlight and
Backplane Sections
o
25碌A(chǔ) Shutdown Supply Current
MAX753/MAX754
______________Ordering Information
PART
MAX753CPE
MAX753CSE
MAX753C/D
MAX753EPE
MAX753ESE
MAX754CPE
MAX754CSE
MAX754C/D
MAX754EPE
MAX754ESE
TEMP. RANGE
0擄C to +70擄C
0擄C to +70擄C
0擄C to +70擄C
-40擄C to +85擄C
-40擄C to +85擄C
0擄C to +70擄C
0擄C to +70擄C
0擄C to +70擄C
-40擄C to +85擄C
-40擄C to +85擄C
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
Dice*
16 Plastic DIP
16 Narrow SO
16 Plastic DIP
16 Narrow SO
Dice*
16 Plastic DIP
16 Narrow SO
________________________Applications
Notebook Computers
Palmtop Computers
Pen-Based Data Systems
Personal Digital Assistants
Portable Data-Collection Terminals
* Contact factory for dice specifications.
__________________Pin Configuration
TOP VIEW
V
DD
1
LADJ 2
LON 3
CON 4
CADJ 5
GND 6
REF 7
CFB 8
16 LFB
15 BATT
14 LX
MAX753
MAX754
13 LDRV
12 PGND
11 CDRV
10 CS
9
CC
DIP/SO
Block Diagram located at end of data sheet.
________________________________________________________________
Maxim Integrated Products
1
Call toll free 1-800-998-8800 for free samples or literature.

MAX753CPE PDF文件相關(guān)型號(hào)

MAX753CSE

MAX753CPE 產(chǎn)品屬性

  • Maxim Integrated Products

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