CAT3603 Datasheet PDF - Catalyst Semiconductor
| Part Number | CAT3603 | |
| Description | 3-Channel LED Driver | |
| Manufacturers | Catalyst Semiconductor | |
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There is a preview and CAT3603 download ( pdf file ) link at the bottom of this page. Total 12 Pages | ||
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CAT3603
3-Channel LED Driver in 3x3mm Package
FEATURES
Drives up to 3 LEDs
Current setting resistor
Compatible with supply voltage of 3V to 5.5V
Power efficiency up to 91%
Output Current up to 30mA per LED
Fractional pump 1x/1.5x
Low noise input ripple
Fixed High Frequency Operation 1MHz
“Zero” Current Shutdown Mode
Soft start and current limiting
Short circuit protection
12-lead TDFN 3mm x 3mm package
APPLICATION
LCD Display Backlight
Cellular Phones
Digital Still Cameras
Handheld Devices
ORDERING INFORMATION
Part
Number
Quantity
Package per Reel
CAT3603HV2 TDFN-12 3x3 2000
Green*
* Lead Finish Matte-Tin
Package
Marking
HABB
For Ordering Information details, see page 11.
DESCRIPTION
The CAT3603 is a charge pump LED driver
operating in either 1x (LDO) mode or 1.5x fractional
mode regulating current through each of the 3 LED
pins. Operation at a constant switching frequency of
1MHz allows the use of very small value ceramic
capacitors.
The CAT3603 drives 3 white LEDs in parallel and
provides tightly matched regulated current to achieve
uniform brightness in LCD backlighting applications.
An external resistor, RSET, controls the output
current level. The device can deliver up to 30mA over
an input voltage supply range from 3V to 5.5V,
making it ideal for battery-powered applications
LED dimming can be accomplished using several
methods; using a DC voltage to set the RSET pin
current, applying a PWM signal on the EN pin, or
adding a switched resistor in parallel with RSET. The
EN input pin allows the device to be placed in power-
down mode with “near-zero” quiescent current.
The device is available in the tiny 12-lead thin DFN
3mm x 3mm package with a max height of 0.8mm.
PIN CONFIGURATION
12-lead TDFN 3mm (Top view)
TYPICAL APPLICATION CIRCUIT
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Note: Unused LED channels must be connected to VOUT.
1 Doc. No. 5017 Rev. C
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CAT3603
TYPICAL CHARACTERISTICS
VIN = 3.6V, IOUT = 60mA (3 LEDs at 20mA), C1 = C2 = CIN = COUT = 1µF, TAMB = 25°C unless otherwise specified.
Switching Waveforms in 1.5x Mode
Operating Waveforms in 1x Mode
Power Up 3 LEDs at 20mA, VIN = 3.2V (1.5x Mode)
Power Up 3 LEDs at 20mA, VIN = 4V (1x Mode)
LED Current vs. RSET
100
10
1
10 100 1000
RSET [kohm]
Line Transient Response in 1x Mode
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
5
Doc. No. 5017 Rev. C
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for CAT3603 electronic component. |
| Information | Total 12 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ CAT3603.PDF Datasheet ] | |
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