LV549 查看數據表（PDF） - Gennum -> Semtech

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产品描述 (功能)

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LV549

High Power Class B Output Stage

Gennum -> Semtech 

High Power Class B

Output Stage

LC549/LV549/LD549 DATA SHEET

FEATURES

DESCRIPTION

• 40dB of electrical gain

• 1.0 to 1.6 VDC supply operating range

• current trim capability (RT)

• high efficiency class B output stage

• may be used with a linear or compression preamplfier

STANDARD PACKAGING

• 8 pin MICROpac (LC549)

• 8 pin MINIpac

• 8 pin PLID® (LC549, LD549)

• Chip (47 x 40 mils) (LC549, LD549)

The LC/LV/LD549 is an 8 pin, low voltage, push-pull audio

frequency output stage amplifier with a single unbalanced

input. The circuit utilizes two internal negative feedback

loops to stabilize the DC operating point for temperature

stability and to linearize the transfer function over a wide

dynamic range. The circuit operates near ideal class B

conditions resulting in low distortion and very low quiescent

current, required for extended battery life.

The LC549, LV549 and LD549 differ in only one respect;

the LV549 and LD549 are selected devices which are

capable of delivering from 10 mA to 41 mA and from 36 mA

to 75 mA of output current respectively. These values are

the maximum current drawn with both output stage transistors

in saturation. Thus the LD549 is capable of producing a

high output in a low impedance load, the LV549 is selected

to have lower peak currents, extending the life of the

battery.

RT VB

36

5

OUTPUT 1

2

INPUT

8

OUTPUT 2

41

DEC 1 DEC 2

7

GND

U.S. Patent No. 4,085,382

Patented in other countries

BLOCK DIAGRAM

Revision Date: January 2001

Document No. 500 - 25 - 09

GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-5946

Japan Branch: A-302 Miyamae Village, 2-10-42 Miyamae, Suginami-ku Tokyo 168, Japan tel. (03) 3334-7700 fax: (03) 3247-8839

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