News & Info
WLED Driver has Flicker-Free Dimming
Micrel , represented in Australia and New Zealand by Soanar, has released the MIC3263, a six channel White LED Driver for Backlighting Applications. This device is the first in a new series of WLED Drivers targeting small LCD Panels with a highly versatile dimming control scheme for LED brightness. The flicker-free dimming control scheme eliminates the need for an external PLL for noise filtering of the PWM signal required to dim the LED current.
The MIC3263 is capable of driving up to ten WLEDs in series per channel with 3 percent current accuracy from input voltages of 6V to 40V. With its boost current mode control architecture and integrated power switch delivering 90 percent and above efficiency, the MIC3263 is well positioned to provide constant current with changes in input voltage and output load. The solution’s operating frequency is programmable from 400kHz to 1.8MHz which allows flexibility in the design. The LED channel current is programmable from 15 mA to 30 mA and includes a dedicated PWM dimming pin to adjust the brightness of the LEDs.
Features:
- Multiple LED dimming options and its 16-logarithmic dimming levels allow the dimming ratio down to 1 percent
- An enable pin for micro power shutdown, over temperature protection and an under voltage lockout
- The IC has a wide range of protection features including
- Open and short LED protection,
- Programmable over voltage protection
- Over temperature protection
- 4mm x 4mm MLF®-24L package
For further information please contact info@soanar.com
