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LM4700 Datasheet

Overture Audio Power Amplifier Series 30W Audio Power Amplifier with Mute and Standby Modes

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March 1998
LM4700
OvertureAudio Power Amplifier Series
30W Audio Power Amplifier with
Mute and Standby Modes
General Description
The LM4700 is an audio power amplifier capable of deliver-
ing typically 30W of continuous average output power into an
8load with less than 0.1% (THD + N).
The LM4700 has an independent smooth transition fade-in/
out mute and a power conserving standby mode which can
be controlled by external logic.
The performance of the LM4700, utilizing its Self Peak In-
stantaneous Temperature (˚Ke) (SPiKe) Protection Cir-
cuitry, places it in a class above discrete and hybrid amplifi-
ers by providing an inherently, dynamically protected Safe
Operating Area (SOA). SPiKe Protection means that these
parts are completely safeguarded at the output against over-
voltage, undervoltage, overloads, including thermal runaway
and instantaneous temperature peaks.
Key Specifications
n THD+N at 1 kHz at continuous average output power of
25W into 8:
0.1% (max)
n THD+N from 20 Hz to 20 kHz at 30W of continuous
average output power into 8:
0.08% (typ)
n Standby current:
2.1 mA (typ)
Features
n SPiKe Protection
n Minimal amount of external components necessary
n Quiet fade-in/out mute function
n Power conserving standby-mode
n Isolated 11-lead TO-220 package
Applications
n Component stereo
n Compact stereo
Typical Application
Connection Diagram
Isolated Plastic Package
DS012369-1
*Optional components dependent upon specific design requirements. Refer
to the External Components Description section for a component functional
description.
FIGURE 1. Typical Audio Amplifier Application Circuit
SPiKeProtection and Overtureare trademarks of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS012369
DS012369-2
Top View
Order Number LM4700TF
See NS Package Number TF11B
www.national.com


National Semiconductor Electronic Components Datasheet

LM4700 Datasheet

Overture Audio Power Amplifier Series 30W Audio Power Amplifier with Mute and Standby Modes

No Preview Available !

Absolute Maximum Ratings (Notes 4, 5)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage |VCC| + |VEE|
(No Signal)
Supply Voltage |VCC| + |VEE|
(with Input and Load)
Common Mode Input Voltage
Differential Input Voltage
Output Current
Power Dissipation (Note 6)
ESD Susceptibility (Note 7)
66V
64V
(VCC or VEE) and
|VCC| + |VEE| 60V
60V
Internally Limited
62.5W
2000V
Junction Temperature (Note 8)
Thermal Resistance
θJC (Note 14)
θJA
Soldering Information
TF Package (10 sec.)
Storage Temperature
150˚C
2˚C/W
43˚C/W
260˚C
−40˚C TA +150˚C
Operating Ratings (Notes 4, 5)
Temperature Range
TMIN TA TMAX
Supply Voltage |VCC| + |VEE| (Note 1)
−20˚C TA +85˚C
20V to 64V
Electrical Characteristics
(Notes 4,
ply for TA
5)
=
The following
25˚C.
specifications
are
for
VCC
=
+28V,
VEE
=
−28V
with
RL
=
8,
unless
otherwise
specified.
Limits
ap-
Symbol
Parameter
Conditions
LM4700
Units
Typical Limit (Limits)
(Note 9) (Note
10)
|VCC| + |VEE|
Power Supply Voltage
(Note 11)
GND − VEE 9V
18 20 V (min)
64 V (max)
PO
(Note 3)
Output Power
(Continuous Average)
THD + N = 0.1% (max), f = 1 kHz
RL = 8, |VCC| = |VEE| = 28V
30 25 W/ch
(min)
RL = 4, |VCC| = |VEE| = 20V (Note 13)
22 15 W/ch
(min)
THD + N
SR (Note 3)
ITOTAL
(Note 2)
Total Harmonic Distortion
Plus Noise
Slew Rate
Total Quiescent Power
Supply Current
30W/ch, RL = 8,
20 Hz f 20 kHz, AV = 26 dB
VIN = 1.414 Vrms, trise = 2 ns
VCM = 0V, VO = 0V, IO = 0 mA
Standby: Off
0.08 %
18 12 V/µs (min)
25 40 mA (max)
Standby: On
2.1 mA
Standby Pin
VIL
VIH
Mute Pin
Standby Low Input Voltage
Standby High Input Voltage
Not in Standby Mode
In Standby Mode
0.8 V (max)
2.0 2.5 V (min)
VIL
VIH
AM
VOS (Note 2)
IB
IOS
IO
VOD
(Note 2)
PSRR
(Note 2)
Mute Low Input Voltage
Mute High Input Voltage
Mute Attenuation
Input Offset Voltage
Input Bias Current
Input Offset Current
Output Current Limit
Output Dropout Voltage
(Note 12)
Power Supply Rejection Ratio
Output Not Muted
Output Muted
VPIN8 = 2.5V
VCM = 0V, IO = 0 mA
VCM = 0V, IO = 0 mA
VCM = 0V, IO = 0 mA
|VCC| = |VEE| = 10V, tON = 10 ms,
VO = 0V
|VCC − VO|, VCC = 20V, IO = +100 mA
|VO − VEE|, VEE = −20V, IO = −100 mA
VCC = 30V to 10V, VEE = −30V,
VCM = 0V, IO = 0 mA
VCC = 30V, VEE = −30V to −10V
VCM = 0V, IO = 0 mA
2.0
115
2.0
0.2
0.002
3.5
1.8
2.5
115
0.8 V (max)
2.5 V (min)
80 dB (min)
15 mV (max)
0.5 µA (max)
0.2 µA (max)
2.9 APK (min)
2.3 V (max)
3.2 V (max)
85 dB (min)
110 85 dB (min)
www.national.com
2


Part Number LM4700
Description Overture Audio Power Amplifier Series 30W Audio Power Amplifier with Mute and Standby Modes
Maker National Semiconductor
Total Page 15 Pages
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