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ON Semiconductor - 4-Channel Regulated Charge Pump White LED Driver

Numéro de référence CAT3604
Description 4-Channel Regulated Charge Pump White LED Driver
Fabricant ON Semiconductor 
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CAT3604 fiche technique
CAT3604
4-Channel Regulated
Charge Pump White LED
Driver
Description
The CAT3604 is a charge pump operating in either 1x (LDO) mode
or 1.5x fractional mode regulating current through each of the 4 LED
pins. Operation at a fixed high frequency of 1 MHz typical allows the
use of very small value ceramic capacitors.
The CAT3604 drives white light-emitting diodes (LEDs) connected
in parallel and provides tightly matched regulated current to achieve
uniformity of brightness in LCD backlighting applications. An
external resistor RSET controls the output current level. LED currents
of up to 30 mA are supported over a range of input supply voltages
from 3 V to 5.5 V, making the device ideal for battery-powered
applications.
LED dimming can be accomplished by several methods including
using a DC voltage to set the RSET pin current, applying a PWM
signal on the Control signals, or adding a switched resistor in parallel
with RSET. The Enable input pin allows the device to be placed in
power-down mode with “zero” quiescent current.
The CAT3604 features short circuit and overcurrent limiting
protection. The device is available in a 16pad TQFN package with a
max height of 0.8 mm.
Features
Drives Individually up to 4 LEDs
Output Current up to 30 mA per LED
Digital Control On/Off of Each LED
Compatible with Supply Voltage of 3 V to 5.5 V
Power Efficiency up to 93%
2 Modes of Operation 1x and 1.5x
Automatic Short Circuit Detect/Disable
Highfrequency Operation at 1 MHz
Low Value Ceramic Capacitors
“604” Compatible Pinout
Soft Start and Current Limiting
TQFN 16pad Package, 4 x 4 mm, 0.8 mm Max Height
These Devices are PbFree, Halogen Free/BFR Free and are RoHS
Compliant
Applications
Color LCD and Keypad Backlighting
Cellular Phones
Handheld Devices
Digital Cameras
PDAs
Portable MP3 Players
http://onsemi.com
TQFN16
HV4 SUFFIX
CASE 510AE
PIN CONNECTIONS (Note 1)
EN
CTR0
CTR1
CTR2
1
GND
GND
C2+
C2
C1
(4 x 4 mm) (Top View)
MARKING DIAGRAMS
G364
CDBA
G364 = CAT3604HV4T2
CDBA = CAT3604HV4GT2
ORDERING INFORMATION
Device
CAT3604HV4T2
CAT3604HV4GT2
Package
TQFN16
(Note 2)
TQFN16
(Note 3)
Shipping
2,000/
Tape & Reel
1. The package exposed pad is electrically connec-
ted inside the package to GND and to pin 12.
2. MatteTin Plated Finish (RoHScompliant).
3. NiPdAu Plated Finish (RoHScompliant).
© Semiconductor Components Industries, LLC, 2010
February, 2010 Rev. 1
1
Publication Order Number:
CAT3604/D

PagesPages 11
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