General Description

The G569C is a single chip solution for the various functions relating to laser diode operation in a CD-RW drive. The G569C integrates nine functional blocks in one chip. It has five voltage-to-current converters, one current-to-voltage converters which is called FSA, one OP-AMP, one eight-channels D/A converter, and one voltage subtracter with output clamping capability called Dalpha.

Features

■ Single +5V supply

■ Laser diode read current driver

■ Laser diode write current driver

■ Laser diode Erase current driver

■ Deltap circuit to control write current

■ FSA circuit to integrate photo diode current

■ Cagain circuit to convert Vcagain into current

■ Dalpha circuit to perform voltage subtraction and limiting

■ 3-wire interface to control internal DAC

■ A build-in OP-AMP

■ 48-pin SSOP package

Applications

■ CD-RW Drive