3-Channel Laser Diode Driver w/Oscillator & APC Amplifier

The EL6173 is a high performance three-channel laser driver that provides controlled current to a grounded laser diode. Write channels 2 and 3 can provide up to 200mA per channel of DC or pulsed current, with switching speeds of approximately one nanosecond rise/fall time. All three channels are summed together at the IOUT output, allowing the user to create multilevel waveforms in order to optimize laser diode performance. The level of the output current is set by an analog voltage applied to an external resistor which converts the voltage into a current at the IIN pin (virtually ground). The current seen at this pin is then amplified to become a current source at pin IOUT.

Features

• “Shrink-Small” outline package

• Voltage-controlled output current source to 200mA per

channel, requiring one external set resistor per channel

• Current-controlled output current source to 200mA per

channel

• Rise time = 0.8ns

• Fall time = 0.8ns

• On-chip oscillator with frequency and amplitude control by

use of external resistors to ground

• Oscillator to 500MHz

• Oscillator to 100mAPK/PK

• Single +5V supply (±10)

• Disable feature for power-up protection and power savings

• Fast-settling APC amplifier

• Pb-free Available as an Option

Applications

• CD-RW applications

• Writable optical drives

• Laser diode current switching