CAT3636 Driver Datasheet

CAT3636 Datasheet PDF, Equivalent


Part Number

CAT3636

Description

6-Channel LED Driver

Manufacture

Catalyst Semiconductor

Total Page 15 Pages
PDF Download
Download CAT3636 Datasheet PDF


CAT3636
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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

CAT3636
www.DataSheet4U.com
CAT3636
ABSOLUTE MAXIMUM RATINGS
Parameter
VIN, LEDx, C1±, C2± voltage
VOUT voltage
EN/SET voltage
Storage Temperature Range
Junction Temperature Range
Lead Temperature
Rating
6
7
VIN + 0.7V
-65 to +160
-40 to +125
300
RECOMMENDED OPERATING CONDITIONS
Parameter
VIN
Rating
2.5 to 5.5
Ambient Temperature Range
-40 to +85
ILED per LED pin
Total Output Current
0 to 32
0 to 192
Unit
V
V
V
°C
°C
°C
Unit
V
°C
mA
mA
Typical application circuit with external components is shown on page 1.
ELECTRICAL OPERATING CHARACTERISTICS
(over recommended operating conditions unless specified otherwise) VIN = 3.6V, EN = High, TAMB = 25°C
Symbol
IQ
IQSHDN
ILED-ACC
ILED-DEV
ROUT
FOSC
ISC_MAX
LEDTH
VHYS
TDF
IIN_MAX
IEN/DIM
VHI
VLO
TSD
THYS
VUVLO
Name
Quiescent Current
Shutdown Current
LED Current Accuracy
LED Channel Matching
Output Resistance (open loop)
Charge Pump Frequency
Output short circuit Current Limit
1x to 1.33x or 1.33x to 1.5x or
1.5x to 2x Transition Thresholds
at any LEDxx pin
1.33x to 1x Transition Hysteresis
Transition Filter Delay
Input Current Limit
EN/DIM Pin
Input Leakage
Logic High Level
Logic Low Level
Thermal Shutdown
Thermal Hysteresis
Undervoltage lockout (UVLO)
threshold
Conditions
1x mode, no load
1.33 x mode, no load
1.5x mode, no load
2x mode, no load
VEN = 0V
1mA ILED 31mA
ILED ILEDAVG
ILED
1x mode, IOUT = 100mA
1.33x mode, IOUT = 100mA
1.5x mode, IOUT = 100mA
2x mode, IOUT = 100mA
1.33x and 2x mode
1.5x mode
VOUT < 0.5V
VOUT > 1V
Min
0.6
0.8
-1
1.3
Typ
0.5
3.5
3
2.5
±3
±1
0.5
4.5
3.5
6
0.8
1.1
80
Max
1
1.1
1.4
Units
mA
mA
mA
mA
µA
%
%
MHz
MHz
mA
150
400
500
450
1
0.4
150
20
2
mV
mV
µs
mA
µA
V
V
°C
°C
V
Doc. No. 5020 Rev. A
2 © 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice


Features www.DataSheet4U.com CAT3636 6-Channel Q uad-ModeTM Fractional LED Driver in TQF N3x3 FEATURES „ „ „ „ „ „ „ „ „ „ „ „ „ „ „ High efficiency 1.33x charge pump Quad-mode charge pump : 1x, 1.33x, 1.5x, 2x Drives up to 6 LE Ds at 32mA each 1-wire EZDimTM LED curr ent programming Power efficiency up to 92% Low noise input ripple in all modes “Zero” current shutdown mode Soft start and current limiting Short circui t protection Thermal shutdown protectio n Tiny 3mm x 3mm, 16-lead TQFN package LCD Display Backlight Color RGB LEDs Ce llular Phones Digital Still Cameras Han dheld Devices DESCRIPTION The CAT3636 is a high efficiency quad-mode fraction al charge pump that can drive up to six LEDs programmable by a one wire digita l interface. The inclusion of a 1.33x f ractional charge pump mode increases de vice efficiency by up to 10% over tradi tional 1.5x charge pumps with no added external capacitors. Low noise input ri pple is achieved by operating at a constant switching frequency which allows the us.
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