LM2758TLEV Datasheet, PDF (1/18 Pages) Texas Instruments – LM2758 Switched Capacitor Flash LED Driver in DSBGA

LM2758
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SNVS551D – APRIL 2008 – REVISED MAY 2013
LM2758 Switched Capacitor Flash LED Driver in DSBGA
Check for Samples: LM2758
FEATURES
1
•2 Up to 700 mA Output Current
• Ultra-Small Solution Size
– No Inductor, Only 4 Capacitors and a
Resistor Required
– 1.514 mm x 1.996 mm x 0.6 mm Thin
DSBGA package
• 90% Peak Efficiency
• Indicator, Torch and Flash Modes
• Time-Out Circuitry Limits Flash Duration to
814 msec. (typ.)
• Adaptive 1x and 1.5x Gains for Maximum
Efficiency
• True Shutdown
• Internal Soft-Start Eliminates Inrush Current
APPLICATIONS
• Camera Flash in Mobile Phones
• Flash for Digital Cameras
DESCRIPTION
LM2758 is an integrated low-noise, high-current
switched capacitor DC/DC converter with a regulated
current sink. The device is capable of driving loads up
to 700 mA from a single-cell Li-Ion battery. Maximum
efficiency is achieved over the input voltage range by
actively selecting the proper gain based on the LED
forward voltage and current requirements.
One external low-power resistor sets the desired
current for Indicator, Torch and Flash modes. To
protect the devices and the flash LED, internal Time-
out circuitry turns off the LM2758 in case of a faulty
prolonged Flash mode. Internal soft-start circuitry
limits the amount of inrush current during start-up.
LM2758 is offered in a tiny 12-bump thin DSBGA
package.
Typical Application Circuit
C1
1 PF
C2
1 PF
2.7V to 5.5V
+
-
C_IN
2.2 PF
C1⁺
V_IN
C1^-
C2⁺
LM2758
C2^-
CP_OUT
C_OUT
2.2 PF
EN1
EN2
I_SET
R_SET
LED-
PGND SGND
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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