ADI white LED flash drive ADP1655 to improve camera quality

Analog Devices Inc. (ADI), the latest launch of a dual white LED (light emitting diode) flash drive, the drive to maximize the digital camera with limited LED drive current, the flash brightness increased to more than 200 lumens, thus improving the quality of photos. The reliability of the inductance of the high resolution camera flash drive ADP1655 enhanced cellular mobile phone, digital camera, video camera, PDA camera and other portable devices based on, especially in the dark environment. In a cellular mobile phone application, send the new unique shield driver, the camera flash in the condition of high current, mobile phone and RF transceiver can work normally, to monitor the cellular base station, found in the signal.

ADP1655 integrates a 2MHz Synchronous Boost converter, a 500mA programmable current source and a I2C interface, can easily realize timer and current programming, and read back system work and safety control related data. ADP1655 flash current accuracy of 5%, allowing the camera to increase the current flowing into the LED to improve the brightness of the flash, and does not exceed the security threshold to trigger the phone off.

In addition, the new drive also includes a high current source, allowing the flash LED string is connected with the camera, do not need to be connected to the other end of the IC LED. This enables the design engineer to simplify the wiring of printed circuit boards, shorten the length of the circuit, and reduce the heat dissipation, so that a more compact layout can be used to design the camera circuit.