Exar Corporation XRP6840
The XRP6840 is a controlled-current dual-cell supercapacitor 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 supercapacitor charging current and voltage.| Part No. | XRP6840 |
|---|---|
| Datasheet | XRP6840 Download |
| Manufacturer |  Exar Corporation |
| Description | 4.3A Supercapacitor Flash LED Driver |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Architectured around a 2.4MHz tri-mode 1x, 1.5x and 2x charge pump, the XRP6840 charges the stacked supercapacitor to the programmed output voltage with no more than 600mA drawn from the battery. While charging, an internal active balance circuitry insures matching of the stacked capacitors’ voltages. A standard 2-line I2C serial interface allows the dynamic programming of LED currents in torch and flash modes, flash timeout, channel enable, gain control, capacitor charge voltage, and enable. The XRP6840 comes in a 2 and 3 channel version 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.APPLICATIONS
● High Power Torch/Strobe/Flash LED● High Resolution Cameras
● Generic High Power...
