LC550 データシートの表示（PDF） - Gennum -> Semtech

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LC550

Medium Power Class B Amplifier

Gennum -> Semtech 

FEATURES

• 23dB class A preamp & 40dB class B output stage

• 1.0VDC to 1.7VDC operating range

• 2.2kΩ on chip microphone decoupling resistor

• 350µA typical quiescent current

• 400Hz to 20kHz frequency response

STANDARD PACKAGING

Hybrid Typical Dimensions:

0.0945 × 0.1115 × 0.042in

(2.40 × 2.83 × 1.07mm)

Medium Power

Class B Amplifier

LC550 - HYB DATA SHEET

DESCRIPTION

The LC550 is a low voltage linear monolithic integrated

circuit amplifier. It is comprised of two separate amplifiers

on a single chip. The first is a 23dB Class A preamp

followed by a 40dB Class B output stage.

Both stages incorporate negative feedback to control gain,

minimize distortion and stabilize operation at very low

quiescent currents.

The preamp and output stage have their inputs and outputs

separately pinned out. This is an advantage as it allows

access to both stages, providing the designer with flexibility

and a full range volume control.

The combination of low quiescent current and a medium

power push-pull output makes the LC550 suitable for

medium power BTE hearing aids and for high power ITE

aids where efficiency and battery life are a premium

consideration.

V MIC

6

2.2k

VB

9

8

IN A

23 dB

40 dB

5

OUT B2

1

OUT B1

10

7

32

4

GND OUT A IN B DEC B1 DEC B2

All resistors in ohms, all capacitors in µF unless otherwise stated.

U.S. Patent No. 4,085,382, patented in other countries.

BLOCK DIAGRAM

Doc.No.27425 - 2 [Rev. January 2004]

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