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Elantec laser drivers suit DVD/CD optical drives

Posted: 22 Mar 2002 ?? ?Print Version ?Bookmark and Share

Keywords:el6285c? el6219c? el6218c? laser diode driver? cd laser driver?

The EL6285C and EL6219C laser drivers both provide dual ouputsone each for the CD and DVD laserto controller interfaces, enabling optical disk drive manufacturers to accelerate the development of DVD/CD dual-writer drives from existing CD writer drive designs.

The EL6285C is a dual 3-channel laser driver with one read and two write levels, while the EL6219C has four channels but has one read and three write levels. Each channel has a separate enable pin for the DVD or CD driver output to provide compatibility with existing single-channel designs.

Each 32-pin LLP device also incorporates two separate HFM oscillators for up to 500MHz and 100mA per output to reduce laser-noise and read-noise error rates.

The current outputs of the two EL6285C write channels are rated at 250mA and 150mA, while the three write channel current outputs of the EL6219C are 200mA and 100mA. Both support up to 32X CD-R speeds, and comply with the Orange Specification Standard for CD-R and CD-RW write strategies, and DVD formats.

The company also released the EL6218C laser diode driver for 32X CD-R and 20X CD-RW optical disk drives. It integrates a fast-settling I/V amplifier and one 250mA output current write channel to enable driving the higher power 780nm lasers required in 32X or faster CD-R speeds.

Along with the three current channels needed for compliance with the Orange Specification Standard for CD-R and CD-RW write strategy formats, the EL6218C also integrates an APC amplifier and HFM oscillator.

The EL6218C is pin- and functionally-compatible with the company's EL6248C driver.





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