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LDS8868 Datasheet(PDF) 1 Page - IXYS Corporation

Part No. LDS8868
Description  6-Channel Ultra Low Dropout LED Driver
Download  14 Pages
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Manufacturer  IXYS [IXYS Corporation]
Direct Link  http://www.ixys.com
Logo IXYS - IXYS Corporation

LDS8868 Datasheet(HTML) 1 Page - IXYS Corporation

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LDS8868
© 2009 IXYS Corp.
1
Doc. No. 8868_DS, Rev. N2.1
Characteristics subject to change without notice
6-Channel Ultra Low Dropout LED Driver
FEATURES
o
Charge pump modes: 1x, 1.5x, 2x
o
Ultra low dropout PowerLite
™ Current
Regulator*
o
Drives up to 6 LEDs at 32mA each
o
1-wire LED current programming
o
Power efficiency up to 94%
o
Low input noise & ripple in all charge pump
modes
o
Low current shutdown mode
o
Short circuit current limiting
o
Thermal shutdown protection
o
Available in 3 x 3 x 0.8 mm 16-pin TQFN
package
APPLICATION
o
Keypad and Display Backlight
o
Cellular Phones
o
Digital Still Cameras
o
PDAs and Smartphones
DESCRIPTION
The
LDS8868
is
a
high
efficiency multi-mode
fractional charge pump with ultra low dropout voltage
that can drive up to six LEDs. Inclusion of an ultra low
dropout
PowerLite
™ Current
Regulator
(PCR)
increases device’s efficiency up to 94%.
The EN/SET logic input functions as a chip enable
and a current setting interface.
The LEDs current is programmable by one wire
digital interface from 0.5 to 32mA in 0.5mA steps or
from zero to 3.75mA in 0.25mA steps. Every LED
bank with two LEDs each may be turned on/off or
programmed separately
Low noise input ripple is achieved by operating at a
constant switching frequency which allows the use of
small
external
ceramic
capacitors.
The
multi-
fractional charge pump supports a wide range of
input voltages from 2.7V to 5.5V.
The device is available in in 16-lead TQFN 3 mm x 3
mm package with a max height of 0.8 mm.
TYPICAL APPLICATION CIRCUIT


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