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CAT3644

Description
LED DISPLAY DRIVER, QCC16
Categorysemiconductor    Analog mixed-signal IC   
File Size297KB,14 Pages
ManufacturerCatalyst
Websitehttp://www.catalyst-semiconductor.com/
Download Datasheet Parametric Compare View All

CAT3644 Overview

LED DISPLAY DRIVER, QCC16

CAT3644 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals16
Maximum operating temperature85 Cel
Minimum operating temperature-40 Cel
Maximum supply voltage 15.5 V
Minimum supply voltage 12.5 V
Rated supply voltage 13.6 V
Processing package description3 X 3 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, MO-229, TQFN-16
Lead-freeYes
EU RoHS regulationsYes
stateACTIVE
packaging shapeSQUARE
Package SizeCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
surface mountYes
Terminal formNO LEAD
Terminal spacing0.5000 mm
terminal coatingMATTE TIN
Terminal locationQUAD
Packaging MaterialsUNSPECIFIED
Temperature levelINDUSTRIAL
data entry modeSERIAL
Interface TypeLED DISPLAY DRIVER
number of segments4
CAT3644
4-Channel Ultra High Efficiency Quad-Mode™
LED Driver
FEATURES
High efficiency 1.33x charge pump
Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x
Drives up to 4 LEDs at 25mA each
1-wire EZDim™ LED current programming
Power efficiency up to 92%
Low noise input ripple in all modes
“Zero” current shutdown mode
Soft start and current limiting
Short circuit protection
Thermal shutdown protection
3mm x 3mm, 16-pad TQFN package
DESCRIPTION
The CAT3644 is a high efficiency Quad-Mode
TM
fractional charge pump that can drive up to four LEDs
programmable by a one wire digital interface. The
inclusion of a 1.33x fractional charge pump mode
increases device efficiency by up to 10% over tradi–
tional 1.5x charge pumps with no added external
capacitors.
Low noise input ripple is achieved by operating at a
constant switching frequency which allows the use of
small external ceramic capacitors. The multi-fractional
charge pump supports a wide range of input voltages
from 2.5V to 5.5V.
The EN/DIM logic input functions as a chip enable and
a digital dimming interface for current setting of all
LEDs. Six different current ratios are available via the
interface.
The device is available in the tiny 16-pad TQFN
3mm x 3mm package with a max height of 0.8mm.
TM
Catalyst Semiconductor’s Quad-Mode 1.33x charge
pump switching architecture is patented.
APPLICATION
LCD Display Backlight
Cellular Phones
Digital Still Cameras
Handheld Devices
ORDERING INFORMATION
Part Number
CAT3644HV3-T2
CAT3644HV3-GT2
Qty per Reel
2000
2000
(2)
(1)
Marking
JAAG
JAAH
For Ordering Information details, see page 13.
Notes:
(1) Matte-Tin Plated Finish (RoHS-compliant)
(2) NiPdAu Plated Finish (RoHS-compliant)
PIN CONFIGURATION
Top View
LED1
GND
TYPICAL APPLICATION CIRCUIT
1µF
1µF
NC
NC
C1+
CIN
1µF
EN/DIM
RSET
4.02kΩ
GND
V
IN
C1- C2+
C2-
V
OUT
V
OUT
C
OUT
1µF
LED1
LED2
LED3
LED4
20mA
16
LED2
LED3
LED4
RSET
1
2
3
4
5
EN/DIM
15
14
13
12 C2-
11 C2+
10 C1-
9 C1+
V
IN
2.4V
to
5.5V
CAT3644
1-Wire
EZDim
TM

Programming
6
VOUT
7
NC
8
VIN
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. MD-5023, Rev. E

CAT3644 Related Products

CAT3644 CAT3644HV3-T2 CAT3644HV3-GT2 CAT3644_0710
Description LED DISPLAY DRIVER, QCC16 LED DISPLAY DRIVER, QCC16 LED DISPLAY DRIVER, QCC16 LED DISPLAY DRIVER, QCC16
Number of functions 1 1 1 1
Number of terminals 16 16 16 16
Maximum operating temperature 85 Cel 85 °C 85 °C 85 Cel
Minimum operating temperature -40 Cel -40 °C -40 °C -40 Cel
surface mount Yes YES YES Yes
Terminal form NO LEAD NO LEAD NO LEAD NO LEAD
Terminal location QUAD QUAD QUAD QUAD
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL INDUSTRIAL
data entry mode SERIAL SERIAL SERIAL SERIAL
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