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PDF CAT3603 Data sheet ( Hoja de datos )
| Número de pieza | CAT3603 | |
| Descripción | 3-Channel LED Driver | |
| Fabricantes | Catalyst Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CAT3603 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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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
1 page  
www.DataSheet4U.com
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
5 Page 
www.DataSheet4U.com
EXAMPLE OF ORDERING INFORMATION
Prefix
CAT
Device #
3603
Suffix
HV2
–
Product Number
3603
Optional
Company ID
Package
HV2: TDFN (Lead-free, Halogen-free)
T2
Tape & Reel
T: Tape & Reel
2: 2000/Reel
CAT3603
Notes:
(1) All packages are RoHS-compliant (Lead-free, Halogen-free).
(2) The standard lead finish is Matte-Tin.
(3) The device used in the above example is a CAT3603HV2 –T2 (TDFN, Tape & Reel).
(4) For additional package and temperature options, please contact your nearest Catalyst Semiconductor Sales office.
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
11
Doc. No. 5017 Rev. C
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet CAT3603.PDF ] | |
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