LA4587 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LA4587

Preamplifier + Power Amplifier for 1.5 V Headphone Stereos

SANYO -> Panasonic 

LA4587M

Operation Description

. The input amplifiers are inverting amplifiers. The gain and HPF characteristics can be adjusted through an external C-R

. (input impedance).

The AMSS comparator outputs pulses for an input waveform that satisfies certain set conditions (frequency and voltage

level).

Input

Output

.When AMSS is not used, the input pins (pins 24 and 25) are connected to VREF (pin 33).

Notes on the ripple filter

. The RF SVRR can be adjusted by an external capacitor connected to pin 44.

3.3 µF → 39 dB

4.7 µF → 42 dB

10 µF → 47 dB

. It is recommended that external transistors be equivalent to the 2SB1295 with hFE 6 rank and upward.

Note on power output

.The power amplifier output and the common amplifier output are connected by a resistor of approximately 160 Ω.

Notes on power mute

. Power mute turns off the fixed current that is supplied to the power section.

. The output DC when power mute is on is the VREF electric potential (0.75 V).

. The output impedance when power mute is on is approximately 10 kΩ.

No.5204-12/18

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