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Dual diode driver revs laser disk writes

Posted: 19 Nov 2002 ?? ?Print Version ?Bookmark and Share

Keywords:intersil? el6229c? laser diode driver? dual laser driver?

Intersil Corp.'s dual, three-channel laser diode driver, the EL6229C, performs high-speed (up to 52x) read (CD-R) and read/write (CD-R/W) operations for laser disk drives, thus enabling optical disk drive manufacturers to increase the performance of existing designs or quickly develop a DVD/CD dual writer/driver from a single CD writer/drive design.

"Our latest offering, a dual laser driver that provides outputs for both a CD and DVD laser, allows customers a quick upgrade path to better waveform fidelity, better performance and higher-speed CD-R and CD-R/W drives," said Stephen Sacarisen, director of strategic marketing at Intersil's Elantec Optical Storage Products.

"The EL6229C is pin-for-pin compatible with our EL6119 but offers the superior performance of our new EL622XC family, enabling read and read/write speeds up to 52x (x = 150kbps) in CD-R/W laser disk drives.

"Like the other products in our EL622XC family, the EL6229C reduces component count, shortens signal routing and enables more compact optical-pickup designs."

Intersil said its three-channel (one read and two write levels) laser driver provides improved current control to both CD and DVD laser diodes. Each channel has a separate enable pin for the DVD or CD driver output. That simplifies control and ensures compatibility with existing single-channel designs.

The EL6229C, which works off a single 5V supply, has an on-chip 600MHz oscillator to allow frequency and amplitude control by use of external resistors to ground. The external resistors enable customers to set each amplifier's transconductance accurately and independently, thus ensuring broad voltage D/A compatibility. The chip also includes a disable feature for power-up protection and power savings.

The EL6229C complies with the industry-standard Orange Specification for CD-R and CD-R/W write strategy disk formats at speeds up to 52x and all DVD formats. It is available now in a 32-pin LPP at $3.50 each in 10,000-unit quantities.

EE Times

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