ISL78365

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Automotive High Speed Quad Laser Diode Driver

OVERVIEW

The ISL78365 high-speed, quadruple output Laser Diode Driver (LDD) is designed to support high speed RGB/RGGB laser scanning projection systems.

Each output driver channel consists of independent threshold and color DACs for greater laser control and flexibility. Separate scale DACs allow independent scaling of both threshold and color DAC output values to control the projector brightness or provide simple Automatic Power Calibration (APC) for laser based systems. Pixel data information is transferred through the LDD's high speed 10-bit parallel video interface. There are two parallel interface modes to allow three or four color pixel data to be entered efficiently. Pixel data employs a double data rate scheme, allowing video data to be transferred using both edges of the clock.

KEY FEATURES

  • High-speed quadruple output laser diode driver supporting up to 150MHz maximum output pixel clock
  • Up to 750mA of peak current output per channel
  • Fast output switching speeds with pulse rise/fall times of 1.5ns for crisp pixels
  • Intersil laser voltage sampler function with integrated dynamic power optimization controller to dramatically minimize system power
  • Flexible data order supports different RGB LD opto-mechanical placement
  • Blanking time power reduction to reduce LDD current consumption
  • Programmable multi-pulse Return to Zero (RTZ) function to provide maximum flexibility
  • Single 3.3V supply and 1.8V video interface compatible for low power systems
  • 3-wire SPI interface
  • Operating temperature range: -40°C to +125°C
  • AEC-Q100

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL78365
Production Status
Mass Production
VS (max)
3.6 V
VS (min)
3 V
IOUT
750 mA
FMAX
150 MHz
Rise Time
1.5 ns
Fall Time
1.5 ns
Soft-Start
No
Output
Current
Parametric Applications
RGB scanning laser projection system, Laser based projectors, Generic laser based applications requiring multiple independently controlled lasers or a single high current driver
Internal Oscillator
Yes
Qualification Level
Automotive
Supply Voltage Vs Range (V)
3 to 3.6
Temperature Range
-40 to +125

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