XRP6840_10 Datasheet, PDF (1/2 Pages) Exar Corporation – 4.3A Super Capacitor Flash LED Driver with 12C

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XRP6840 4.3A Super Capacitor Flash LED Driver with I2C
General Description:
XRP6840 controlled current dual cell super capacitor
charger and high power LED driver. Operating from a
standard lithium-ion battery the XRP6840 provides up to
4.3A of programmable flash LED current and up to 600mA
and 5.6V of programmable super capacitor charging
current and voltage.
Architectured around a 2.4Mhz tri mode 1x,1.5x and 2x
pump charges the stacked super capacitor to programmed
output voltage with no more than 600mA drown from the
battery. While charging, an internal active balance circuitry insures matching of the stacked capacitor’s
voltages.
A Standard 2-line I2C serial interface allows the dynamic programming of LED currents in Flash and torch
modes, flash timeout and channel enable, gain control, capacitor charge voltage and enable. The
XRP6840 comes in a 2 and 3 channel
versions
supporting
respectively
440mA/2.15A per channel and
300mA/1.45A in torch/flash modes.
The flexibility designed into the XRP6840
can also allow it to reverse the power flow
back to the input to prevent unintended
system resets as the battery voltage drops.
The XRP6840 is available in a
lead-free“green”/halogen free 20-pin
TQFN package.
Key Features:
 Programmable 4.3A flash led
driver
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