Product category:
Power Supply ICs and Controllers
News Release from: Intersil | Subject: EL6900C
Edited by the Electronicstalk Editorial
Team on 01 October 2002
Driver ready for Blu-Ray disc lasers
Intersil is claiming a breakthrough with the world's first laser driver designed specifically for the new Blu-Ray disc industry-standard optical disc recording format.
Intersil is claiming a breakthrough with the world's first laser driver designed specifically for the new Blu-Ray disc industry-standard optical disc recording format Blu-Ray disc is the next-generation recording technology beyond DVD that dramatically increases recording density to a massive 27Gbyte
This article was originally published on Electronicstalk on 8 Oct 2008 at 8.00am (UK)
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Blu-Ray is aimed at a variety of high growth applications including archival storage, ultra density optical (UDO) storage drives and consumer video recording (DVRs).
It can record more than 13h of standard video (compared with the current limit of 133min) or over 2h of high definition digital TV (HDTV) or cinema quality video on a single 120mm DVD/CD size disc.
According to industry analysts (In-Stat/MDR) "The EL6900C and the Blu-Ray disc recording standard will meet the surging demand for increased disc-based video and data recording capacity.
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We project this new technology will propel the DVD rewritable market to 62 million units worldwide in 2006 and Intersil is paving the way with its new drivers".
The new laser driver uses a shorter-wavelength 405nm blue-violet laser, compared with the 650nm red laser used in today's conventional DVD technology.
The shorter-wavelength laser allows a smaller spot size and track pitch to be recorded on the disc thereby increasing storage density from 4.7 to 27Gbtye on a single-sided disc.
The new driver was developed by Intersil's Elantec product group, whose portfolio already includes the industry's leading solutions for CD and DVD recordable disk laser drivers.
The innovative design of the EL6900C programmable laser driver features the Blu-Ray disc standard write-strategy waveforms integrated into its built-in high-speed waveform generator.
This eliminates the need to drive high-speed timing signals and critical accuracy write-current power signals over the flexible cable.
These signals are all programmed and stored digitally and converted internally to an analogue output to drive the laser.
This results in a dramatic reduction in time and amplitude noise and faster conversion.
In addition, its multi-level programmability increases the fidelity of the write operation and enables the device to break through the performance limits and design barriers of existing parallel architecture laser diode drivers.
The EL6900C also offers significant performance and cost-saving benefits.
On-chip real-time power control is provided because the EL6900C includes a two-channel sample-and-hold amplifier that can be programmed for four separate gains under register control.
Time and manufacturing costs are further reduced because each channel has an 8bit calibration DAC to eliminate the need for external potentiometers, normally required for external calibration during manufacturing.
Each channel's 210MHz clock speed enables up to 3x Blu-Ray disc write performance.
Closed-loop automatic power control (APC) is supported with the EL6900's additional Islope and IAPC inputs.
A separate high-current driver for the laser is not needed because the EL6900C contains a high-current output that directly drives the blue-violet laser.
A digital serial bus makes it easy to program the internal command and data registers.
Other features include: programmable amplitude and frequency modulation, low-noise read amplifier, programmable laser slope compensation DAC and programmable laser threshold current DAC.
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