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PDF CXA2610AN Data sheet ( Hoja de datos )
| Número de pieza | CXA2610AN | |
| Descripción | Laser Driver | |
| Fabricantes | Sony Corporation | |
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Laser Driver
CXA2610AN
Preliminary
Description
The CXA2610AN is a laser driver IC for optical
discs. This IC supports higher optical power output
speeds.
16 pin SSOP (Plastic)
Features
• LD driver with excellent driving capability
• Write current of 250mA (max.) possible by setting
the IIN2 (Pin 2) and IIN3 (Pin 5) external resistors
• Rise time ≈ 3ns
• Fall time ≈ 4ns
• The oscillation frequency of the built-in oscillation
circuit can be set from 100 to 600MHz by
connecting the OSCFR (Pin 4) external resistor to
GND.
• The oscillator amplitude initial value of the built-in
oscillation circuit can be set by connecting the
OSCGA (Pin 12) external resistor to GND, and the
oscillator amplitude can be adjusted by the IINR
input current value.
• Oscillation ON/OFF can be set as desired.
• Single +5V power supply
• TTL/CMOS control for control system
Absolute Maximum Ratings
• Supply voltage
Vcc 5.5
• Operating temperature Topr –10 to +70
• Storage temperature
Tstg –65 to +150
V
°C
°C
Operating Conditions
Supply voltage
4.5 to 5.5 V
Applications
• CD-R driver
• CD-RW driver
• DVD driver
• Writable optical driver
• Laser diode current switching
Structure
Bipolar silicon monolithic IC
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
PE00145-PS
1 page  
CXA2610AN
Description of Functions
(1) LD drive current value setting
The current controlled by the current setting pins IINR, IIN2 and IIN3 is output from the LD0 pin.
The current flowing to the LD0 pin can be set independently for IINR, IIN2 and IIN3 by CONTR, CONT2 and
CONT3.
(2) LD drive current forced OFF
Forced OFF is enabled by setting the ENABLE pin Low.
(3) Oscillation circuit
The oscillation circuit is turned ON forcibly by setting the OSCENA pin Low.
(OSCENA × CONTR × (CONT2 + CONT3))
The oscillation circuit is turned ON by setting the OSCENA pin High only for read.
(OSCENA × CONTR × CONT2 × CONT3)
(4) Oscillation frequency adjustment
The oscillation frequency can be varied by the external resistance value connected to the OSCFR pin.
(5) Oscillation level adjustment
The oscillation level initial value can be set by the external resistance value connected to the OSCGA pin.
The oscillation level can be adjusted by varying the IINR input current value.
In addition, the read block DC compensation current IR that flows when oscillation is OFF is independent of
the OSCGA pin external resistance value, and is constant.
Oscillator OFF
Initial setting
Level adjustment
For large OSCGA
external resistance
(Io ≈ 0mA)
For small OSCGA
external resistance
2IR
IO + 2 (IR – IO)
IR
IO
0
IINR input current [µA]
12 2k
OSCGA external resistance [Ω]
IO
IR < IO
IR > IO
IINR input current [µA]
OSCGA pin voltage
40
IO ≈ × [mAp-p]
OSCGA external resistance 9
(6) Logic
The logic table for the CONTR, CONT2, CONT3 and ENABLE pins is shown below.
Be sure to also check the timing chart on page 7.
ENABLE
L
H
H
H
H
H
CONTR
X
H
L
L
L
L
CONT2
X
H
H
L
H
L
CONT3
LD0
X OFF
H OFF
H IINR
H IINR + IIN2
L IINR + IIN3
L IINR + IIN2 + IIN3
–5–
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet CXA2610AN.PDF ] | |
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