CAT3616HV4-T2 datasheet(1/14 Pages) CATALYST

Part #	CAT3616HV4-T2

Description	6-Channel Charge Pump LED Driver with EZDimTM

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Manufacturer	CATALYST [Catalyst Semiconductor]

Direct Link	http://www.catalyst-semiconductor.com

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CAT3616

1

Doc. No. MD-5018 Rev. C

Characteristics subject to change without notice

6-Channel Charge Pump LED Driver

with EZDim

TM

FEATURES

6 LED channels with tight matching

Independent Main and Sub channels

1-wire EZDim

TM Programmable LED Current

Accurate 1mA Dimming Level

Power efficiency up to 91%

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

Thermal shutdown protection

RoHS-compliant 16-pad TQFN 4mm x 4mm

package

APPLICATION

Main and sub-display backlight

Color LCD and keypad Backlighting

Cellular Phones

Handheld Devices

Digital Cameras

ORDERING INFORMATION

Part Number

Package

Quantity

per Reel

Package

Marking

CAT3616HV4-T2

TQFN-16

(1)

2000

G616

CAT3616HV4-GT2 TQFN-16

(2)

2000

CDAH

Notes: (1) Matte-Tin Plated Finish (RoHS-compliant).

(2) NiPdAu Plated Finish (RoHS-compliant).

DESCRIPTION

The CAT3616 is a high efficiency 1x/1.5x fractional

charge pump with programmable dimming current in

six LED channels. To ensure uniform brightness in

LCD backlight applications, each LED channel

delivers an accurate regulated current.

Low noise and input ripple is achieved by operating at

a constant switching frequency of 1MHz which allows

the use of small external ceramic capacitors. The

1x/1.5x fractional charge pump supports a wide range

of input voltages from 3V to 5.5V with efficiency up to

91%, and is ideal for Li-Ion battery powered devices.

Two groups of LEDs, main (MAIN1 to MAIN4) and sub

(SUB1 and SUB2) are programmable through the

ENM

¯¯¯ (active low) and ENS

¯¯¯ inputs. Independent

current from 1mA to 31mA with a 1mA step are set by

toggling the ENM

¯¯¯ and ENS

¯¯¯ inputs. The enable EN

input pin allows to shutdown the device with zero

quiescent current.

The device is available in a 16-

pad TQFN package

with a max height of 0.8mm.

PIN CONFIGURATION

TQFN 16-pad 4 x 4mm (Top view)

TYPICAL APPLICATION CIRCUIT

Note:

Unused LED channels must be connected to VOUT.

For Ordering Information details, see page 13.

Similar Part No. - CAT3616HV4-T2

Manufacturer	Part #	Datasheet	Description
Catalyst Semiconductor	CAT3616HV4-T2	537Kb / 14P	6-Channel Charge Pump LED Driver with EZDimTM
ON Semiconductor	CAT3616HV4-T2	322Kb / 14P	6-Channel Charge Pump LED Driver with EZDim April, 2010 ??Rev. 3

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CAT3616HV4-T2 Datasheet(PDF) 1 Page - Catalyst Semiconductor

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