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

No. de pieza CAT3616HV4-T2
Descripción Electrónicos  6-Channel Charge Pump LED Driver with EZDimTM
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Fabricante Electrónico  CATALYST [Catalyst Semiconductor]
Página de inicio  http://www.catalyst-semiconductor.com
Logo CATALYST - Catalyst Semiconductor

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

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CAT3616
© 2006 Catalyst Semiconductor, Inc.
1
Doc. No. 5018 Rev. A
Characteristics subject to change without notice
6-Channel Charge Pump LED Driver
with EZDimTM
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-lead Thin QFN 4mm x 4mm
package
APPLICATION
Main and sub-display backlight
Color LCD and keypad Backlighting
Cellular Phones
Handheld Devices
Digital Cameras
DESCRIPTION
The CAT36
16 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-lead thin QFN package
with a max height of 0.8mm.
ORDERING INFORMATION
Part
Number
Package
Quantity
per Reel
Package
Marking
CAT3616HV4 Thin QFN-16
Green*
2000
G616
*Lead Finish Matte-Tin
For Ordering Information details, see page 13.
PIN CONFIGURATION
TYPICAL APPLICATION CIRCUIT
TQFN 16-lead 4x4mm (Top view)
Note: Unused LED channels must be connected to VOUT.


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