Linear Technology Electronic Components Datasheet

LTC3220IPF-1 Datasheet

360mA Universal 18-Channel LED Driver

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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

2.2µF

6-LED Main, 4 RGB LEDs

VIN

DVCC

2.2µF

C1P C1M C2P C2M

VIN

CPO

LTC3220

LTC3220-1

DVCC

0.1µF

ULED1-18

I2C

RESET

SCL/SDA

RST GND

4.7µF

RGB1

RGB2

RGB3

RGB4

For more information www.linear.com/LTC3220

MAIN

3220 TA01

32201fd

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

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

580

µA

2.4

3.2

l 1.5

5.5

1.5

32201fd

For more information www.linear.com/LTC3220

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LTC3220IPF-1 Datasheet

360mA Universal 18-Channel LED Driver

LTC3220IPF-1 Datasheet

360mA Universal 18-Channel LED Driver

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