For true-color LED spotlight applications below 3W, consider the SN3396, a 3-channel constant current LED driver from the company, which is specifically designed to drive RGB LEDs efficiently from a voltage source greater than the LED voltage. The chip's input voltage range is 6V to 40V and provides an externally adjustable output constant current of up to 350mA.
These three channels can be independently controlled by PWM signals with a dimming ratio of up to 1200:1 per channel. The SN3396 contains a high side output current sense circuit that uses an external resistor to set the nominal average output current. It requires only 3 external components per channel.
The main selling points of the SN3396 include:
· 3-channel independent RGB control
· Less peripheral components
· Up to 350mA output current per channel
· Internal 40V power switch
· Up to 95% conversion efficiency
· Dimming ratio up to 1200:1
· Up to 1MHz switching frequency
· Inherent open circuit LED protection
· Thermal shutdown protection circuit
· Typical output current accuracy is 5%
The typical application circuit of the SN3396 is:
Editor: China Lighting Network - Wheat
Absolute rotary Encoder measure actual position by generating unique digital codes or bits (instead of pulses) that represent the encoder`s actual position. Single turn absolute encoders output codes that are repeated every full revolution and do not output data to indicate how many revolutions have been made. Multi-turn absolute encoders output a unique code for each shaft position through every rotation, up to 4096 revolutions. Unlike incremental encoders, absolute encoders will retain correct position even if power fails without homing at startup.
Absolute Encoder,Through Hollow Encoder,Absolute Encoder 13 Bit,14 Bit Optical Rotary Encoder
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