BA6386K Просмотр технического описания (PDF) - ROHM Semiconductor

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BA6386K

Preservo amplifier for CD players

ROHM Semiconductor 

Optical disc ICs

(3) APC block and AGC block

BA6386K

The initial setting for V1 is 1.2V. When PL-BL (the RF AC

amplitude) exceeds a certain value (VAGC), then AGC low-

ers V1 and suppresses the laser power. The value of VAGC

is Iagc 20k, where Iagc is set by the formula given be-

low.

Iagc = 1.2

1.4k)R18

When R18 = 10kΩ, Iagc = 50µA and VAGC = 1V.

When defect turns high, Tr1 turns OFF.

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