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EL6119
Data Sheet June 15, 2004 FN7208
Dual 4-Channel Laser Diode Driver + Oscillator
The EL6119 is a dual four-channel laser diode current amplifier that provides controlled current to both a CD and DVD laser diode. Channels 2, 3, and 4 should be used as the write channels, with switching speeds of approximately one nanosecond rise/fall time. All four channels are summed together at the IOUT output, allowing the user to create multilevel waveforms in order to optimize laser diode performance. The level of the output current is set by an analog voltage applied to an external resistor which converts the voltage into a current at the IIN pin (virtually ground). The current seen at this pin is then amplified to become a current source at pin IOUT. Output current pulses are enabled when an `L' signal is applied to the WEN pin. No output current flows when WEN is `H' and additional laser diode protection is provided since the WEN input will float high when open. Complete IOUT shutoff is also achieved by holding the ENABLE pin low, which will override the WEN control pins. Each laser driver has a separate ENABLE pin to allow total shutdown of each laser driver when not in use. An on-chip 500MHz oscillator is provided to allow output current modulation when in read mode. The oscillator is enabled when the OSCEN pin is held high. Complete control of amplitude and frequency is set by two external resistors connected to ground at pins RFREQ and RAMP (see graphs in this data sheet for further explanation).
Features
* Leadless plastic package * Voltage controlled output current source, requiring one external set resistor per channel * Rise time = 0.8ns * Fall time = 0.8ns * On chip oscillator with frequency and amplitude control by use of external resistors to ground * Oscillator to 500MHz * Oscillator to 100mAPK/PK * Single +5V supply (10%) * Disable feature for power-up protection and power savings * CMOS control signals
Applications
* CD + DVD Combo applications * Writable optical drives * Laser diode current switching
Ordering Information
PART NUMBER EL6119CL EL6119CL-T13 PACKAGE 32-Pin QFN 32-Pin QFN TAPE & REEL 13" PKG. DWG. # MDP0046 MDP0046
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EL6119
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Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
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