LA4525.PDF
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Ordering number: EN4022C
Monolithic Linear IC
LA4525
Dual AF Power Amplifier
for Radio Cassette Recorders
Overview
Package Dimensions
unit : mm
The LA4525 requires only a small number of external
components to drive either two 4 W speakers or one 8 W
speaker. The output power is typically 0.65 W when driving
two 4 W speakers.
3001B-DIP8
[LA4525]
Features
.
Two-channel (dual) or single-channel (BTL) operation
.
0.65 W (typ) output power into two 4 W speakers
.
Wide power supply range: 3 to 15 V
.
8-pin DIP (No heat sink needed)
SANYO : DIP8
Specifications
Absolute Maximum Ratings
at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max Rg = 0
15
V
Allowable power dissipation
Pd max
Note
1.5 W
Operating temperature
Topr
–25 to +75 °C
Storage temperature
Tstg
–40 to +150 °C
Note: Mounted on a 50 ´ 50 ´ 1.6 mm
3
heat dissipating board
Recommended Operating Conditions
at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
V
CC
6
V
Load resistance range
R
L
4
W
Supply voltage range
V
CC
op
Not in excess of package Pd
3 to 15
V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
32896HA(II)/D0192TS/4162TS No.4022-1/8
.
Requires only a few external components.
LA4525
Operating Characteristics
at V
CC
= 6 V, Ta =25°C, R
L
=4
W
,f=1kHz, Rg = 600
W
,
Dual operation unless otherwise noted
Parameter
Symbol
Condition
min typ max Unit
Quiescent supply current
I
CCO
Rg=0
W
10 15 30 mA
Output power
P
O
1 THD = 10%
0.45 0.65
W
P
O
2 V
CC
=9V,R
L
=8
W
, THD = 10%
1.0
W
Voltage gain
VG V
O
= 0 dBm
38 40 42 dB
Total harmonic distortion
THD P
O
= 0.1 W
0.2 0.7 %
Output noise voltage
V
NO
Rg=0
W
, DIN AUDIO filter
100 400 µV
Supply voltage ripple rejection SVRR Rg = 0
W
,f
R
= 100 Hz, V
R
= 0 dBm
35 43
dB
Channel separation
CH Sep V
O
= 0 dBm, R
g
=0
W
45 55
dB
Input resistance
Ri
70 100 130 k
W
Equivalent Block Diagram
IN2
Ch2
input
amp.
Pre-
driver
amp.
Output
amp.
BTL IN
OUT2
PRE GND
POWER GND
IN1
Ch1
input
amp.
Pre-
driver
amp.
Output
amp.
OUT1
Pin Description
Number
Name
Description
1
OUT1 Channel 1 output
2
V
CC
Supply voltage
3
OUT2 Channel 2 output
4
POWER GND Power amplifier ground
5
BTL IN Bridge test load input
6
IN2
Channel 2 input
7
IN1
Channel 1 input
8
PRE GND Preamplifier ground
No.4022-2/8
LA4525
Mounted on Sanyo
recommended board
Independent IC
Ambient temperature, Ta − °C
Dual Operation
Unit (capacitance:F)
Sample Printed Circuit Pattern
Unit (capacitance:F)
65
´
65mm
2
(Cu-foiled area)
No.4022-3/8
LA4525
External Components Comparison
Pin Voltages
External components
Existing
Sanyo ICs
LA4525
Pin number
Pin name
Pin voltage
1
OUT1
2.8 V
Output capacitors
¥
¥
2
V
CC
6V
Input capacitors
¥
¥
3
OUT2
2.8 V
Bootstrap capacitors
¥
´
4
POWER GND
0 V
Feedback capacitors
¥
´
5
BTL IN
65 mV
Filter capacitors
¥
´
6
IN2
1.4 V
Oscillation damping mylars
¥
´
7
IN1
1.4 V
Dual-mode operation total
11
4
8
PRE GND
0 V
Supply voltage, V
CC
−V
Supply voltage, V
CC
−V
Input voltage, V
IN
−mV
Output power, P
O
−W
Frequency,f−Hz
Output power, P
O
−W
No.4022-4/8
Output noise voltage, V
NO
−mV
Frequency response − dB
Current drain, I
CC
−mA
Ripple rejection, SVRR − dB
Channel separation, CH sep − dB
Power dissipation, Pd − W
Output power, P
O
−W
Plik z chomika:
maciejek62
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