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Linear Technology Electronic Components Datasheet

LTC3220IPF-1 Datasheet

360mA Universal 18-Channel LED Driver

No Preview Available !

Features
n Eighteen 20mA Universal Current Sources with
64-Step Linear Brightness Control
n Independent On/Off, Brightness Level, Blinking and
Gradation Control for Each Current Source Using
2-Wire I2C Interface
n Low Noise Multi-Mode Charge Pump (1x, 1.5x, 2x)
Provides Up to 91% Efficiency
n Slew Limited Switching Reduces Conducted and
Radiated Noise (EMI)
n Up to 360mA Total Output Current
n Internal Current Reference
n Single Reset Pin for Asynchronous Shutdown and
Reset of All Data Registers
n Two I2C Addresses Are Available (LTC3220: 0011100,
LTC3220-1: 0011101)
n Automatic or Forced Mode Switching
n Internal Soft-Start Limits Inrush Current
n Short-Circuit/Thermal Protection
n 4mm × 4mm Ultrathin (0.55mm) 28-Lead QFN
Package
Applications
n Video Phones with QVGA+ Displays
n Keypad Lighting
n General/Miscellaneous Lighting
LTC3220/LTC3220-1
360mA Universal
18-Channel LED Driver
Description
The LTC®3220/LTC3220-1 are highly integrated multi-
display LED drivers. These parts contain a high efficiency,
low noise charge pump to provide power to up to eighteen
universal LED current sources. The LTC3220/LTC3220-1
require only five small ceramic capacitors to form a
complete LED power supply and current controller.
The LED currents are set by an internal precision current
reference. Independent dimming, on/off, blinking and
gradation control for all universal current sources are
achieved via the I2C serial interface. 6-bit linear DACs are
available to adjust brightness levels independently for each
universal LED current source.
The LTC3220/LTC3220-1 charge pump optimizes efficiency
based on the voltage across the LED current sources. The
part powers up in 1x mode and will automatically switch
to boost mode whenever any enabled LED current source
begins to enter dropout. The first dropout switches the
parts into 1.5x mode and a subsequent dropout switches
the LTC3220/LTC3220-1 into 2x mode. The parts reset to
1x mode whenever a data bit is updated via the I2C port.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6411531.
Typical Application
C2
2.2µF
C3
2.2µF
6-LED Main, 4 RGB LEDs
VIN
DVCC
C1
2.2µF
C1P C1M C2P C2M
VIN
CPO
LTC3220
LTC3220-1
DVCC
0.1µF
ULED1-18
I2C
RESET
SCL/SDA
RST GND
C4
4.7µF
18
RGB1
RGB2
RGB3
RGB4
For more information www.linear.com/LTC3220
MAIN
3220 TA01
32201fd
1


Linear Technology Electronic Components Datasheet

LTC3220IPF-1 Datasheet

360mA Universal 18-Channel LED Driver

No Preview Available !

LTC3220/LTC3220-1
Absolute Maximum Ratings
(Notes 1, 4)
VIN, DVCC, CPO to GND................................. –0.3V to 6V
ULED1-ULED18 to GND................................. –0.3V to 6V
SDA, SCL, RST............................ –0.3V to (DVCC + 0.3V)
ICPO (Continuous) (Note 2)................................... 360mA
IULED1-18 (Note 2)....................................................25mA
CPO Short-Circuit Duration............................... Indefinite
Operating Temperature Range (Note 3)
LTC3220E/LTC3220E-1.........................–40°C to 85°C
LTC3220I/LTC3220I-1......................... –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Pin Configuration
TOP VIEW
28 27 26 25 24 23 22
ULED1 1
ULED2 2
ULED3 3
ULED4 4
ULED5 5
ULED6 6
ULED7 7
21 ULED18
20 ULED17
19 ULED16
29
18 ULED15
17 ULED14
16 ULED13
15 ULED12
8 9 10 11 12 13 14
PF PACKAGE
28-LEAD UTQFN (4mm × 4mm)
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
order information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3220EPF#PBF
LTC3220EPF#TRPBF
3220T
28-Lead UTQFN (4mm × 4mm)
–40°C to 85°C
LTC3220EPF-1#PBF
LTC3220EPF-1#TRPBF 2201T
28-Lead UTQFN (4mm × 4mm)
–40°C to 85°C
LTC3220IPF#PBF
LTC3220IPF#TRPBF
3220T
28-Lead UTQFN (4mm × 4mm)
–40°C to 125°C
LTC3220IPF-1#PBF
LTC3220IPF-1#TRPBF 2201T
28-Lead UTQFN (4mm × 4mm)
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
Electrical Characteristics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.6V, DVCC = 3V, RST = high, C1 = C2 = C3 = 2.2µF, C4 = 4.7µF,
unless otherwise noted.
SYMBOL
PARAMETER
VIN Operating Voltage
IVIN Operating Current
DVCC UVLO Threshold
DVCC Operating Voltage
VIN UVLO Threshold
CONDITIONS
ICPO = 0, 1x Mode
ICPO = 0, 1.5x Mode
ICPO = 0, 2x Mode
MIN
TYP
MAX UNITS
l 2.9
5.5
V
580
µA
2.4
mA
3.2
mA
1
V
l 1.5
5.5
V
1.5
V
32201fd
2
For more information www.linear.com/LTC3220


Part Number LTC3220IPF-1
Description 360mA Universal 18-Channel LED Driver
Maker Linear
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LTC3220IPF-1 Datasheet PDF






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