LC552 ETC [List of Unclassifed Manufacturers], LC552 Datasheet
LC552
Manufacturer Part Number
LC552
Description
High Power Class B Amplifier
Manufacturer
ETC [List of Unclassifed Manufacturers]
Datasheet
1.LC552.pdf
(3 pages)
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FEATURES
• operates over a supply range of 1.0 V to 3.0 V
• selectable class B or vari-bias class A operation
• feedback stabilized gain
• high power output > 140 dB
• independent preamplifier and output modules
• minimum external parts count
STANDARD PACKAGING
• 14 pin DIP
• 14 pin SOIC
• Chip (50 x 52 mils)
Revison Date: July 1993.
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. (905) 632-2996 fax: (905) 632-5846
Japan Branch: A-302 M i yamae Vi l l age, 2–10–42 M i yamae, Sugi nami–ku, Tokyo 168, Japan
PREAMP
I/P
6
All resistors in ohms, all capacitors in farads unless otherwise stated.
FEEDBACK
PREAMP
80 dB
GND
SPL
9
PREAMP
7
10
V
CC 1
PREAMP
O/P
BLOCK DIAGRAM
8
470
OUTPUT
STAGE
I/P
1
BIAS
5
MIC
DESCRIPTION
The LC552 is a versatile low voltage, high gain, high power
output amplifier.
It features a preamplifier module with adjustable gain and a
unique power amplifier module that can be operated either as
a high power, high efficiency class B amplifier, with very low
quiescent current consumption, or as a medium power
"vari-bias" class A amplifier.
While designed specifically for use in body type hearing aids,
the LC552 can be used in other applications where linear audio
frequency amplification and frequency shaping is required.
2.2K
DEC
A
OUTPUT
STAGE
V
11
CC 2
2
DEC
B
13
CURRENT
High Power Class B Amplifier
14
O/P
GND
TRIM
4
tel. (03) 3334-7700 fax (03) 3247-8839
12
3
OUTPUT B
OUTPUT A
LC552 DATA SHEET
Document No. 500 - 58 - 6
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LC552 Summary of contents
Page 1
... Japan Branch: A-302 M i yamae age, 2–10– yamae, Sugi nami–ku, Tokyo 168, Japan High Power Class B Amplifier DESCRIPTION The LC552 is a versatile low voltage, high gain, high power output amplifier. It features a preamplifier module with adjustable gain and a ...
Page 2
... PREAMP GND SYMBOL CONDITIONS A Output = 0.707 TOT THD Output = 0.707 V RMS Low High 10µ N/C N/C 0µ LC552 R F 200k 10k 0µ1 10µ 10µ 10µ 0µ1 0µ ...
Page 3
... DECOUPLED A 2 5k6 27k O/P STAGE I/P 1 DECOUPLED PREAMP O/P 15k 2k7 Fig. 2 Functional Schematic Diagram 10µ N/C N LC552 0µ1 6µ8 10µ 6µ8 0µ1 Printed in Canada OUTPUT A 3 CURRENT TRIM 14 O/P GND 600 ...