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.

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 emitting 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)

Applications

• Optical disk drive