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PDF CAT3636 Data sheet ( Hoja de datos )
| Número de pieza | CAT3636 | |
| Descripción | 6-Channel LED Driver | |
| Fabricantes | Catalyst Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CAT3636 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
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CAT3636
6-Channel Quad-ModeTM Fractional LED Driver in TQFN3x3
FEATURES
High efficiency 1.33x charge pump
Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x
Drives up to 6 LEDs at 32mA each
1-wire EZDimTM 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
Tiny 3mm x 3mm, 16-lead TQFN package
APPLICATIONS
LCD Display Backlight
Color RGB LEDs
Cellular Phones
Digital Still Cameras
Handheld Devices
ORDERING INFORMATION
Part
Number
Package
CAT3636 TQFN-16
HV3-T2 3x3 Green
Quantity
per Reel
2000
Package
Marking
JAAA
* Matte Tin Lead Finish
For Ordering Information details, see page 14.
PIN CONFIGURATION
DESCRIPTION
The CAT3636 is a high efficiency quad-mode fractional
charge pump that can drive up to six 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 traditional
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/SET logic input functions as a chip enable and a
“1-wire” addressable interface for control and current
setting of all LEDs. Three groups of two LEDs can be
configured with independent LED currents between
0.25mA and 32mA.
The device is available in a tiny 16-lead TQFN 3mm x
3mm package with a max height of 0.8mm.
The 1.33x charge pump with two fly capacitors is a
patent pending architecture exclusive to Catalyst
Semiconductor.
TYPICAL APPLICATION CIRCUIT
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
Doc. No. 5020 Rev. A
1 page  
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CAT3636
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 3.6V, IOUT = 120mA (6 LEDs at 20mA), CIN = COUT = C1 = C2 = 1μF, TAMB = 25°C unless otherwise specified.
Switching Frequency vs. Temperature
1.2
1.1
1.0 1.5x Mode
0.9
0.8
1.33x, 2x Mode
0.7
0.6
-40
-20 0 20 40 60
TEMPERATURE [°C]
80
Output Resistance vs. Input Voltage
10
VF = 3.3V
8
2x
6 1.33x 1.5x
4
2
1x
0
5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0
INPUT VOLTAGE [V]
Power Up in 1x Mode
Power Up in 1.33x Mode
Power Up in 1.5x Mode
Power Up in 2x Mode
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
5
Doc. No. 5020 Rev. A
5 Page 
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PROGRAMMING EXAMPLES
CAT3636
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
11
Doc. No. 5020 Rev. A
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet CAT3636.PDF ] | |
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