SM8613 Nippon_Precision_Circuits America, SM8613 Datasheet - Page 8
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SM8613
Manufacturer Part Number
SM8613
Description
CD Laser Driver
Manufacturer
Nippon_Precision_Circuits America
Datasheet
1.SM8613.pdf
(8 pages)
NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to
improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility for
the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits
are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision
Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification.
The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or
malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter,
including compliance with export controls on the distribution or dissemination of the products. Customers shall not export, directly or
indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies.
Laser APC Convergence Current External Signal Adjustment
The LD convergence current is determined by the internal bias voltage. However, if the APC loop gain resistor
R
The convergence current is adjusted by the LDISET current, shown in the figure below. With VCTR in the
range 0 to 1/3V
center point also decreases in response.
G
is small, the convergence current can be adjusted externally.
DD
, the LDISET current decreases with increasing VCTR, and the laser convergence current
LDISET
RGAIN
CGAIN
SM8613AV
R
LD
R
(approximately 3kΩ)
C
NIPPON PRECISION CIRCUITS INC.
4-3, Fukuzumi 2-chome, Koto-ku,
Tokyo 135-8430, Japan
Telephone: +81-3-3642-6661
Facsimile: +81-3-3642-6698
http://www.npc.co.jp/
Email: sales
G
G
→ small
VCTR
(0 to V
@
npc.co.jp
DD
/3)
NIPPON PRECISION CIRCUITS INC.—8
NC0112AE 2001.12