DATASHEET

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.
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EL6836
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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
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