LINEAR LTC3210-2/LTC3210-3 Manual
The LTC3210-2/LTC3210-3 is a low noise charge pump DC/DC converter designed to drive three or four MAIN LEDs and one high current CAM LED for camera lighting. The LTC3210-2/LTC3210-3 require only four small ceramic capacitors and two current set resistors to form a complete LED power supply and current controller. Built-in soft-start circuitry prevents excessive inrush cur- rent during start-up and mode changes. High switching frequency enables the use of small external capacitors. Independent MAIN and CAM full-scale current settings are programmed by two external resistors. Shutdown mode and current output levels are selected via two logic inputs. ENM and ENC are toggled to adjust the LED currents via internal counters and DACs. A 5-bit linear DAC (32 steps) provides high resolution brightness control for the MAIN display. The charge pump optimizes effi ciency based on the volt- age across the LED current sources. The part powers up in 1x mode and will automatically switch to boost mode whenever any enabled LED current source begins to enter dropout. The LTC3210-2/LTC3210-3 are available in a 3mm × 3mm 16-lead QFN package.
Brand: LINEAR
File format: PDF
Size: 230 KB
MD5 Checksum: 35C926E2A6EDA4B9E8C6610C8FAEFFF2
Publication date: 17 November, 2011
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PDF Link: LINEAR LTC3210-2/LTC3210-3 Manual PDF