The EL6202 consists of a variableamplitude, push only, oscillator thatalso supplies the laser DC current. It isdesigned to easily interface to existing ROM controllers,reducing parts count, and power dissipation.The reduction of parts count and the small package allowsthe oscillator to be placed closer to the laser, thus reducingEMI. Also, the turn-on and turn-off edges are slew ratelimited to reduce higher harmonics.The total current drawn from the power supply can be lessthan the laser threshold current due to the unique push-onlymodulation method. The average current is less than thepeak oscillator current, and can be less than half of theoscillator current. The power control current supplied fromthe main board is reduced to less than 2mA.One external resistor sets the oscillator frequency. A currentapplied to the IIN terminal determines the amplitude of theoscillator and laser DC current. If the oscillator amplitude isset very low, the output and oscillator are disabled. The partis available in the space-saving SOT23-5 package. It isspecified for operation from 0°C to +70°C.
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