Other Parts Discussed in Thread: TLC5940,
Facebook has an array of LEDs and are looking for a driver, rough spec below. The most important feature is low noise in the current output.
LED Driver spec
- Constant current with one LED illuminated at any time
- Modulation rate in 10s of kHz
- High accuracy and consistency between channels and devices (there are >16 LEDs in a system so driving from one IC is probably not practical)
- All devices are synchronized and driven by a master controller.
- Good line and load regulation and minimum variation with temperature
- Very stable, low noise current
- Low dropout voltage is useful
- Current is in the range 1-100mA
- 6-8 bit global adjust is required
- optional per LED current adjust is useful
There look to be a set of TI devices (TLC5916, TLC5940) which look very close but there doesn’t appear to be any noise data in the datasheet. Do you know if there is any data or if not, if there is another family of parts which might be suitable?
