Hand Tools Co., Ltd , http://www.nshandtools.com
Sipex and California Micro Devices (CAMD) have launched high-current light-emitting diode (LED) driver ICs for camera flash illumination applications. Sipex's products are "SP7618" (published in English), and CAMD's products are "PhotonIC CM9410/9412" (published, English). Both output currents are up to 1A.
Sipex's SP7618 can set the output current from 33mA to 1A, and can implement Flash Mode, Torch Mode, and Red-eye Reduction. The drop voltage is quite low and can be powered directly from a Li-Ion rechargeable battery or three alkaline batteries (series) without a boost regulator. In addition, Sipex also listed the SP6819/7619A with the SP6018, which can be selected from the 2nd output current. For the setting of the output current, the SP7619 can be set to 200mA or 500mA, and the SP7619A can be set to 200mA or 700mA. The package uses a 2mm x 3mm DFN.
CAMD's CM9410/9412 operates from 3.0 to 5.5V with an efficiency of 85%. The output current can be set to the off state, the concentrating mode (the preview mode is used), and the 2-speed flashing mode through the single-wire interface. The current at the time of stop is 0.3 μA or less. The current in the concentrating mode and the blinking mode can be programmed separately by an external resistor. The timeout in flashing mode can also be programmed.
The switching frequency is 1MHz. It has a low voltage interlock function, a current intrusion prevention function, and an overcurrent/overvoltage protection function. The CM9410's package uses a PSP with a pin pitch of 0.4mm, which is only one-fifth of the mounting area compared to a solution of the same specification. The CM9412 is packaged in a 3mm x 3mm TDFN.
In terms of price, each price is 1000 pieces, Sipex products start at $0.65, and CAMD products start at $1.00. CAMD products are currently sampling. Mass production is scheduled to begin in the first quarter of 2007. 
Camera flash dedicated high current programmable LED driver
brief introduction: