The SL6039 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 determined by the currents flowing into RSET, W2SET, W3SET, and RSET.

The channel enable pin at RDIS, or the pin pairs of W1DIS-W1DISN, W2DIS-W2DISN, and W3DIS-W3DISN determine current waveform timing. The output write current pulses are enabled when a low is applied to RDIS 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 OSCE-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 FADJ.

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 SL6039AA is available in 28-pin 4x4mm pad-down QFN package.