ISL58315 Datasheet, PDF (1/2 Pages) Intersil Corporation – High Speed Triple Laser Diode Drivers

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High Speed Triple Laser Diode Drivers
ISL58315
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.
Features
• High-speed, triple-output laser diode driver supporting up to
720-pixel HD resolution
Each output channel provides laser-independent current
• Up to 1A of peak current output
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
• Fast output switching speeds with pulse rise/fall times of
1ns to 2ns for crisp pixels
can be used to simplify automatic power calibration (APC) for
• Intersil patented laser voltage sampler function provides
laser-based systems.
dynamic power management capability to dramatically
Pixel data information is transferred through the LDD's
minimize system power
high-speed 10-bit or 15-bit parallel video interface. Three
• Intersil patented SmartLinearizer™ DAC feature provides a
parallel interface modes provide flexibility and allow users a
linear transfer function (input video code to green laser
CONFIDENTIAL ^{trade-off among speed, power and bus width. Pixel data}
employs a double data rate scheme, allowing video data to be
transferred using both clock edges.
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
Applications
formats supported to reduce speed and power. 300MHz
maximum data Input rate supported for 10-bit RGB mode
• Laser-based Pico Projectors
• Blanking time power reduction reduces LDD current
• RGB Scanning and Field-based laser projection systems
consumption to 3mA typical
• Generic laser-based applications requiring multiple,
independently controlled lasers
• Programmable return-to-zero (RTZ) function provides
maximum flexibility
Related Literature
• See application block diagram for Pico Projector (MEMS) at:
http://www.intersil.com/applications/PicoProjector%28MEMS%29.asp
• Integrated heater function for SHG green lasers reduces
external components
• Single 3.3V supply and 1.8V video interface compatible for
low power
SEN
SCLK
SD IO
D [14..0]*
CLK
LO W P
RTZ
CE
S E R IA L
IN T E R F A C E
DATA
IN T E R F A C E
AND
R EG ISTER S
HEATER
ADC
GLUE
LO G IC
OUTPUT
CHANNEL 3
OUTPUT
CHANNEL 2
OUTPUT
CHANNEL 1
MON
IOUT3
NC
IOUT2
IOUT1
NOTE:
* TH E FO LLO W IN G D A TA LIN ES H A VE A LTER N A TIVE U SE, D EPEN D IN G O N
REG ISTER SETTING : D2 = EN3, D4 = EN 2, D 6 = EN1, AN D D10 = SYNC
FIGURE 1. BLOCK DIAGRAM
September 30, 2011
1
FN7543.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas Inc. 2011. All Rights Reserved
Intersil (and design) and SmartLinearizer are trademarks owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.