AN8725FH Datasheet, PDF (1/36 Pages) Panasonic Semiconductor – Semiconductor laser power control IC

ICs for Optical Disk Drive
AN8725FH
Semiconductor laser power control IC
s Overview
The AN8725FH is a laser driver IC that can set a laser
emitting level to a maximum precision in recording and
playback of an optical recording equipment such as PD,
and can modulate a laser light in tune with the external
signal.
s Features
• Digital setting of playback current, peak current, bias
current and abnormal light emitting level
• Peak current and bias current can be modulated by the
external signal.
• Driving current set-up (digital set-up)
For playback: 8-bit + 4-bit (0 mA to 80 mA)
5-bit + 4-bit (0 mA to 150 mA)
For peak: 4-bit + 8-bit (0 mA to 150 mA)
For bias: 4-bit + 8-bit (0 mA to 150 mA)
• Laser output light monitoring circuit built-in
• Abnormal light emitting detecting function built-in:
Possible to set up excessive and insufficient light emit-
ting levels with 4-bit DAC for playback and recording,
respectively.
• Supply voltage abnormality detection:
Voltage down (3.9 V or less), voltage up (6.1 V or more)
s Applications
• Optical disk drive
60
61
14.00±0.20
12.00±0.20
41
40
Unit: mm
80
1
(1.25)
0.50
21
20
0.18
+0.10
–0.05
(1.00)
Seating plane
0.50±0.20
0° to 10°
QFP080-P-1212
1