资 源 简 介
The EL6203 is a push-pull oscillator used to reduce lasernoise. It uses the standard interface to exisTIng ROMcontrollers. The frequency and amplitude are each set with aseparate resistor connected to ground. The TIny packageand harmonic reducTIon allow the part to be placed close to alaser with low RF emissions. An auto turn-off feature allowsit to easily be used on combo CD-RW plus DVD-ROMpick-ups.One external resistor sets the oscillator frequency. Anotherexternal resistor sets the oscillator amplitude. If the APCcurrent is reduced such that the average laser voltage dropsto less than 1.1V, the output and oscillator are disabled,reducing power consumpTIon to a minimum.The current drawn by the oscillator consists of a small biascurrent, plus the peak output amplitude in the positive cycle.In the negative cycle, the oscillator subtracts peak outputamplitude from the laser APC current.This part is pin-compatible to the EL6201. It is superior to theEL6201 in several ways: It has up to 100mA outputcapability, it is more power-efficient, it has less harmoniccontent, and it has an auto shut-off feature activated at 1.1V.The part is available in the space-saving 5 Ld SOT-23package. It is specified for operation from 0°C to +70°C.
