Tiny LED driver sources up to 4 A

Suited for supercapacitor-based LED camera flash applications, the CAT3224 LED-driver offers three fully independent operational modes (charging, flash, and torch) activated via a simple parallel logic interface and the operating current of each mode easily programmed by three external resistors. The part sources up to 4-A LED flash pulses and up to 400-mA torch-mode current and also provides the charging function for dual-cell supercapacitors.

The device features a dual-mode 1x/2x charge pump, which charges the stacked supercapacitor to a nominal voltage of 5.4 V, while an active balance control circuit ensures that both capacitor cell voltages are matched during the charging cycle. Housed in a 16-lead TQFN package, the CAT3224 features thermal shutdown, OVP, and protection against external resistor programming faults. The device also supports reverse output voltage for all conditions. ($0.97 ea/10,000 — available now.)

ON Semiconductor , Phoenix , AZ
Sales 602-244-6600
http://www.onsemi.com