The SL6033 is a high power dual four-channel laser driver that provides controlled current to two grounded laser diodes. 

The OUTSEL pin selects LD1 or LD2 pin active to drive either CD or DVD laser diode.

The level of the output current is set by the voltage at  RSET, WSET2, WSET3, and WSET4.

The channel enable pin at WENRB, or the pin pairs of WEN2-WEN2B, WEN3-WEN3B, and WEN4WEN4B determine current waveform timing.

The  output write  current pulses are enabled when a low is applied to WENRB or high-low to  these  pin pairs with switching speed less than 1 ns rise/fall time.

Two on-chip oscillators can provide  up to 500MHz modulation to the output current. Pin pair OSCEN-OSCENN are held high-low to turn  on the oscillators. Each oscillator’s amplitude and frequency is set by an external resistor connected to ground from AADJ1 or AADJ2. And frequency is set from FADJ1 or FADJ2.

The total output current is the sum of current from the four charnels and the oscillator.

The channel enables are LVDS interface with external 100ohm termination. LD1or LD2 is enabled by when SEL is high or low respectively. 

There is a whole chip enable pin ENBL needed to be high. And complete LD shut-off is achieved by holding ENBL low.

The SL6033A1 is available in 28-pin 5x5mm pad-down QFN package.