EL6836 ® Data Sheet July 1, 2003 FN7351 Dual 4-Channel Driver with Oscillator Features The EL6836 is a high performance, dual output, laser driver for writeable DVD drives. The ENA pin enables the chip, while the SEL1 pin selects the IOUT pin. Various waveforms can be generated where the amplitude is determined by the currents flowing into IINR, IIN2, IIN3, and IIN4. The timing is determined by the signals at WEN2B, WEN3B, and WEN4B. The oscillator is enabled when OSEN is high. The amplified IINR current of the selected channel is enabled when the ENA pin is high. The total output current is the sum of the read current, the enabled write currents, and the oscillator current when enabled. • Two channels for CD or DVD Usually a voltage DAC will drive a resistor that is in series with the IINR, IIN2, IIN3, and IIN4 input. The resistor allows the user to optimize the current gain for each channel. • Voltage-controlled output current source requiring one external set resistor per channel • Rise time = 0.8ns • Fall time = 0.8ns • Channel 2 to 250mA max • Channel 3 to 150mA max • Channel 4 to 100mA max • On chip oscillator with frequency and amplitude control by use of external resistors to ground • Oscillator frequency to 600MHz • Oscillator amplitude to 100mAP-P WEN2B, WEN3B, and WEN4B are CMOS input pins with a 1.68V threshold. Output write current pulses are enabled when a low is applied to the WEN2B, WEN3B, or WEN4B pin. The write current will flow to the selected output. When SEL1 is high IOUT1 is selected. WENRB enables read and oscillator current when low. • Single +5V supply (±10%) The RF oscillators frequency is determined by RFREQ1 or RFREQ2, and its amplitude by RAMP1 or RAMP2. • DVD drives • Chip ENAs for power savings Applications • Super combo drives Pinout 26 VDDQ 25 VDDN GND 2 24 IOUT1 WENRB 3 23 IOUT1 NC 4 22 GND WEN2B 5 21 GND THERMAL PAD 20 VDDN WEN3B 7 19 VDDN NC 8 18 IOUT2 WEN4B 9 17 IOUT2 GND 16 NC 6 OSEN 10 1 27 GND RFREQ2 1 RAMP2 15 Get FULL DATASHEET 28 IINR MDP0046 29 IIN2 32-Pin LPP ENA 13 0°C to +70°C SEL1 12 PKG. DWG. # 31 IIN4 PACKAGE GND 11 EL6836CL TEMP. RANGE 32 RFREQ1 PART NUMBER 30 IIN3 EL6836 (32-PIN LPP) TOP VIEW Ordering Information RAMP1 14 PRELIMINARY CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2003. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc. All other trademarks mentioned are the property of their respective owners. EL6836 All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality 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. For information regarding Intersil Corporation and its products, see www.intersil.com 2