High Speed Triple Laser Diode Drivers

The ISL58315 is a high-speed, triple-output laser diode driver (LDD) for laser scanning projector systems, which require three channels modulated at high speed with independent current control.

Each output channel provides laser-independent current control for threshold and color DACs. Separate scale DACs allow independent scaling of both threshold and color DAC output values. This allows control of projector brightness and can be used to simplify automatic power calibration (APC) for laser-based systems.

Features

• High-speed, triple-output laser diode driver supporting up to

720-pixel HD resolution

• Up to 1A of peak current output

• Fast output switching speeds with pulse rise/fall times of

1ns to 2ns for crisp pixels

• Intersil patented laser voltage sampler function provides

dynamic power management capability to dramatically

minimize system power

• Intersil patented SmartLinearizer™ DAC feature provides a

linear transfer function (input video code to green laser

output), eliminating the need for DSP controller processing

algorithms required for non-linear green lasers

• Flexible 10-bit or Intersil patented 15-bit RGB pixel input

formats supported to reduce speed and power. 300MHz

maximum data Input rate supported for 10-bit RGB mode

• Blanking time power reduction reduces LDD current

consumption to 3mA typical

• Programmable return-to-zero (RTZ) function provides

maximum flexibility

• Integrated heater function for SHG green lasers reduces

external components

• Single 3.3V supply and 1.8V video interface compatible for

low power

Applications

• Laser-based Pico Projectors

• RGB Scanning and Field-based laser projection systems

• Generic laser-based applications requiring multiple,

independently controlled lasers