LA4587 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LA4587

Preamplifier + Power Amplifier for 1.5 V Headphone Stereos

SANYO -> Panasonic 

LA4587M

Description of External Components

. C1 (1.0 to 10 µF):

VREF amplifier is referenced to this decoupling capacitor.

The VREF SVRR depends on the value of this capacitor.

Note that if the capacitance is reduced, the SVRR worsens.

. C2, C10:

. C3, C9 (0.47 to 3.3 µF):

. C4, C8:

. C5, C7:

. C6 (0.1 to 22 µF):

Playback preamplifier EQ constant.

Preamplifier output capacitor.

AMSS input HPF capacitor.

EQ constant for metal (built-in resistance 3.9 kΩ ±15%).

VREF decoupling capacitor.

For high-frequency noise rejection.

. C11, C12 (3.3 to 10 µF):

NFC decoupling capacitor.

Note that if the capacitance is reduced, the preamplifier low-frequency gain decreases.

. C13, C15 (1.0 to 3.3 µF):

. C14, C17:

Power amplifier input capacitor (Input resistance: 10 kΩ).

Capacitor for low boost LPF.

The low boost gain depends on the capacitance.

. C16 (1.0 to 4.7 µF):

Boost amplifier NF capacitator.

Note that if the capacitance is reduced, the low boost low-frequency gain decreases.

. C18, C23, C26 (0.1 to 1.0 µF):

. C19, C22, C25 (3.3 to 10 µF):

Oscillation blocking capacitator.

Power amplifier NF capacitor.

Note that if the capacitance is reduced, the power amplifier low-frequency gain decreases.

. C20, C24:

Bass high boost capacitor.

The high gain depends on the capacitance.

. C21 (100 to 2200 pF):

. C29 (4.7 to 10 µF):

Oscillation blocking capacitator.

RF output decoupling capacitor. (Also serves as the power supply capacitor and the

oscillation blocking capacitor.)

. C28 (22 to 220 µF):

. C30 (2.2 to 10 µF):

Power supply capacitor.

RF is referenced to this LPF capacitor.

The RF SVRR depends on the capacitance.

. C31, C32 (0.047 to 0.22 µF):

. R1, R10:

. R2, R9:

. R3, R8:

. R4, R7:

. R5, R6:

. R11, R12, R13:

. R14, R15 (100 to 430 kΩ):

Switching circuit smoothing capacitor. Must be adjusted according to the set timing.

For preamplifier gain adjustment.

Playback preamplifier EQ constant.

EQ constant for metal.

10 kΩ volume control.

For AMSS gain adjustment and HPF.

For oscillation blocking.

For switching circuit smoothing (discharge resistors).

No.5204-9/18

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