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LDS8681
800 mA, Dual Output LED Flash/PWM Dimming Lamp Driver
FEATURES
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1-x and 2-x Charge Pump modes
Supply voltage range from 2.7 to 5.5 V
Low dropout PowerLite ? Current Regulator*
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Drives up to 2 LEDs at 400 mA
simultaneously or one LED at 800 mA
Power efficiency up to 90%
Low current shutdown mode < 1 μA
Short circuit current limiting
Thermal shutdown protection
Available 8-pin 2 x 3 x 0.8 mm 8-pin TDFN
package
LEDs at 400 mA each simultaneously or one LED at
800 mA. Low dropout PowerLite ? Current Regulator
(PCR) increases device’s efficiency up to 90%.
The EN logic input functions as a chip enable.
The LEDs current is programmed at 400 mA for both
channels in the factory. Please, consult factory about
other current values. Each LED current can be
programmed separately in the factory from 52 to
800 mA in 25 mA steps for LEDA and in the range
APPLICATION
from 52 to 400 mA for LEDB
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White LED photoflash for digital cameras,
The regulated charge pump supports a wide input
cell phones, Smart Phones, and other
portable devices
DESCRIPTION
The LDS8681 is a high efficiency regulated charge
pump with low dropout voltage that can drive two
TYPICAL APPLICATION CIRCUIT
voltage range from 2.7 V to 5.5 V.
The device is available in 8-lead TDFN 2 mm x 3 mm
package with a max height of 0.8 mm.
? 2009 IXYS Corp.
Characteristics subject to change without notice
1
Doc. No. 8681_DS, Rev. N1.0
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