ANPEC APA4800 Service Manual

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APA4800
Stereo 290mW 8 Speaker Driver
Features
••
O perating Voltage
••
Single Supply 3V to 7V Dual Supply ±1.5V to ± 3.5V
••
High Signal-to-Noise Ratio 100dB
••
••
High Slew Rate 5V/ µs
••
••
Low Distortion -65dB
••
••
Output Power at 10% THD+N
••
into 8Ω !!!!!!!!!!!!!! 290mW into 16Ω !!!!!!!!!!!!!! 190mW
••
Large Output Voltage Swing
••
••
Excellent Power Supply Ripple Rejection
••
••
Low Power Consumption
••
••
Short-circuit Elimination
••
••
Wide Temperature Range
••
••
No Switch ON/OFF Clicks
••
••
Available in 8 pin SOP or DIP Package
••
Applications
••
Portable Digital Audio
••
••
Personal Computers
••
••
Microphone Preamplifier
••
Gereral Description
The AP A4800 is an integrated class AB stereo head­phone amplifier contained in an SO-8 or a DIP-8 plas­tic package . The APA4800 is capable of delivering 290mW of max . output power to an 8load with less than 10% (THD+N) from a 5V power supply . The de­vice has been primarily developed for portable digital audio applications .
APA4800
Handling Code Temp. Range Package Code
Package Code J : PDIP - 8 K : SOP - 8 Temp. Range I : - 40 to 85 C Handling Code TU : Tube TR : Tape & Reel
°
Block Diagram
1
Out A
Inverting Input A
Non-inverting Input A
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright ANPEC Electronics Corp. Rev. A.2 - Apr., 2001
2
+
3
4
V
SS
--+
AP A4800
8
V
DD
7
Out B
6
Inverting Input B
5
Non-inverting Input B
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APA4800
Absolute Maximum Ratings
Symbol Parameter Rating Unit
V
DD
T
SC (O)
T T
T
STG
T
V
ESD
Note: *1. Human body model : C=100pF, R=1500, 3 positive pulses plus 3 negative pulses
Thermal Characteristics
Symbol Parameter Value Unit
R
Supply Voltage 5 V Output Short-circuit Duration, at TA=25°C, P Operating Ambient Temperature range -40 to 85
A
Maximum Junction Temperature 150
J
TOT
=1W
20 S
Storage Temperature Range -65 to +150 Soldering Temperature,10 seconds 260
S
Electrostatic Discharge -3000 to 3000
THJA
Thermal Resistance from Junction to Ambient in Free Air
DIP-8
109
*1
C
°
C
°
C
°
C
°
V
K/W
SO-8
Electrical Characteristics
V
DD
VDD=5V
I
DD
V
I(OS)
AC Characteristics
(THD+N)/S Total Harmonic Distortion
P
P
PSRR P ower S upply R ejection
S/N Signal to Noise Ratio
Power Supply Voltage 2.7 5.5
Supply Current No Load 2.5 mA Input Offset Voltage 5 50 mV
P
=200mW, RL=8Ω, f=1kHz plus Noise to Signal Ratio
Output P o wer (THD+N)/S=0.2%, f=1kHz mW
O
O
P
=120mW, RL=16Ω, f=1kHz
O
RL=8 RL=16
Output P o wer (THD+N)/S=10%, f=1kHz mW
O
RL=8 RL=16 C
=2.2 µF,V
Ratio
B
f=120Hz
=8
R
L
210
TA=25°C, f=1kHz( unless otherwise noted)
APA4800Symbol Parameter Test Conditions
Min. Typ. Max.
=200mVrms,
RIPPLE
K/W
0.1
0.05
210 140
290 190
55 dB 20
µ
Unit
V
%
Vrms
Copyright ANPEC Electronics Corp. Rev. A.2 - Apr., 2001
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APA4800
Electrical Characteristics Cont. T
VDD=3V
I
DD
V
I(OS)
Supply Current No Load 2.2 mA Input Offset Voltage 5 mV
AC Characteristics
(THD+N)/S Total Harmonic Distortion
plus Noise to Signal Ratio
P
P
Output P o wer (THD+N)/S=0.2%, f=1kHz mW
O
Output P o wer (THD+N)/S=10%, f=1kHz mW
O
P
=50mW, RL=8Ω, f=1kHz
O
P
=40mW, RL=16Ω, f=1kHz
O
RL=8
RL=16
RL=8
RL=16
Test And Application Circuits
=25°C, f=1kHz( unless otherwise noted)
A
APA4800Symbol Parameter Test Conditions
Min. Typ. Max.
0.15 %
60 45
90 65
Unit
V
DD
V
INA
V
REF
typ.1/2V
V
INB
2.2
DD
2.2µF
220pF
220µF
15k
100
R
F
µ
R
1
F
µ
15k
15k
2
-
+
3
5
6
APA4800
+
-
15k
220pF
8
4
7
220µF
V
OUTA
L
V
OUTB
L
Copyright ANPEC Electronics Corp. Rev. A.2 - Apr., 2001
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APA4800
Typical Characteristics
THD+N vs Output Power
10
VDD= 5V
=8
R
L
AV= -1 BW<80kHz
1
THD+N (%)
0.1
0.01
10m 500m
Output Power (W)
f=20Hz
f=20kHz
f=1kHz
100m
THD+N vs Output Power
10
VDD= 5V
=16
R
L
AV= -1 BW<80kHz
1
THD+N (%)
0.1
0.01 10m 300m
f=20Hz
f=20kHz
f=1kHz
100m
Output Power (W)
10
VDD= 5V
=200mW
P
O
=8
R
L
NO FILTERS
1
THD+N (%)
0.1
0.01 20 20k100 1k
THD+N vs Frequency
AV= -2
= -5
A
V
AV= -1
Frequency (Hz)
10k
THD+N vs Frequency
10
VDD= 5V
=120mW
P
O
=16
R
L
NO FILTERS
1
THD+N (%)
0.1
0.01 20 20k100 1k
AV= -2 A
AV= -1
= -5
V
Frequency (Hz)
10k
Copyright ANPEC Electronics Corp. Rev. A.2 - Apr., 2001
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