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Teilenummer | CAT3616 |
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Beschreibung | 6-Channel Charge Pump LED Driver | |
Hersteller | Catalyst Semiconductor | |
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Gesamt 14 Seiten 6-Channel Charge Pump LED Driver
with EZDimTM
CAT3616
FEATURES
DESCRIPTION
6 LED channels with tight matching
Independent Main and Sub channels
1-wire EZDimTM Programmable LED Current
Accurate 1mA Dimming Level
Power efficiency up to 91%
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.
Fractional pump 1x/1.5x
Low noise input ripple
Fixed High Frequency Operation 1MHz
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
“Zero” Current Shutdown Mode
1x/1.5x fractional charge pump supports a wide range
Soft start and current limiting
of input voltages from 3V to 5.5V with efficiency up to
Short circuit protection
91%, and is ideal for Li-Ion battery powered devices.
Thermal shutdown protection
RoHS-compliant 16-lead Thin QFN 4mm x 4mm
package
Two groups of LEDs, main (MAIN1 to MAIN4) and sub
(SUB1 and SUB2) are programmable through the
E¯N¯M¯ (active low) and E¯N¯¯S inputs. Independent
APPLICATION
current from 1mA to 31mA with a 1mA step are set by
Main and sub-display backlight
Color LCD and keypad Backlighting
Cellular Phones
toggling the E¯N¯M¯ and E¯N¯¯S inputs. The enable EN
input pin allows to shutdown the device with zero
quiescentwww.DataSheet4U.com current.
Handheld Devices
Digital Cameras
The device is available in a 16-lead thin QFN package
with a max height of 0.8mm.
ORDERING INFORMATION
Part
Number
Package
CAT3616HV4 Thin QFN-16
Green*
*Lead Finish Matte-Tin
Quantity
per Reel
2000
Package
Marking
G616
For Ordering Information details, see page 13.
PIN CONFIGURATION
TQFN 16-lead 4x4mm (Top view)
TYPICAL APPLICATION CIRCUIT
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Note: Unused LED channels must be connected to VOUT.
1 Doc. No. 5018 Rev. A
CAT3616
TYPICAL CHARACTERISTICS
VIN = 3.6V, IOUT = 90mA (6 LEDs at 15mA), EN = VIN, E¯N¯M¯ = E¯N¯¯S = GND, CIN = C1 = C2 = COUT = 1µF,
TAMB = 25ºC, unless otherwise specified.
Power Up with 6 LEDs at 15mA (1x Mode)
Power Up with 6 LEDs at 15mA (1.5x Mode)
Enable Power Down Delay (1x Mode)
Enable Power Down Delay (1.5x Mode)
Switching Waveforms in 1.5x Mode
Operating Waveforms in 1x Mode
Doc. No. 5018 Rev. A
6 © 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
6 Page CAT3616
PACKAGE DRAWING AND DIMENSIONS
Thin QFN 16-Lead 4mm x 4mm
C
D2
PIN 1 ID
D
b
E
SYMBOL
MIN
NOM
MAX
A 0.70 0.75 0.80
A1 0.00 0.02 0.05
b 0.25 0.30 0.35
C 0.20 REF
D 3.95 4.00 4.05
D2 2.15 2.20 2.25
e 0.65 BSC
E 3.95 4.00 4.05
E2 2.15 2.20 2.25
L 0.50 0.55 0.60
Notes:
(1) All dimensions are in millimeters.
(2) Complies with JEDEC specification MO-229.
A1
A
E2
e
3xe
L
For current Tape and Reel information, download the PDF file from:
http://www.catsemi.com/documents/TapeandReel.pdf
Doc. No. 5018 Rev. A
12 © 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
12 Page | ||
Seiten | Gesamt 14 Seiten | |
PDF Download | [ CAT3616 Schematic.PDF ] |
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