LC552 Datasheet, PDF (1/3 Pages) List of Unclassifed Manufacturers – High Power Class B Amplifier

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 ≤ 80 dB
• high power output > 140 dBSPL
• independent preamplifier and output modules
• minimum external parts count
STANDARD PACKAGING
• 14 pin DIP
• 14 pin SOIC
• Chip (50 x 52 mils)
High Power Class B Amplifier
LC552 DATA SHEET
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.
FEEDBACK ^VCC 1
9 10
470
PREAMP
I/P
6
PREAMP
MIC
BIAS
5
CURRENT
V_{CC 2 TRIM}
11 14
2.2K
OUTPUT
STAGE
12
OUTPUT B
3
OUTPUT A
7
8
1
2 ¹³ 4
PREAMP
GND
PREAMP
O/P
OUTPUT DEC DEC O/P
STAGE A B ^GND
I/P
All resistors in ohms, all capacitors in farads unless otherwise stated.
BLOCK DIAGRAM
Revison Date: July 1993.
Document No. 500 - 58 - 6
GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 tel. [phone] fax: [phone]
Japan Branch: A-302 M i yamae Vi l l age, 2–10–42 M i yamae, Sugi nami–ku, Tokyo 168, Japan tel. [phone] fax [phone]