LM4701T/NOPB National Semiconductor, LM4701T/NOPB Datasheet

IC AMP AUDIO PWR 30W AB TO220-9

LM4701T/NOPB

Manufacturer Part Number
LM4701T/NOPB
Description
IC AMP AUDIO PWR 30W AB TO220-9
Manufacturer
National Semiconductor
Series
Overture™r
Type
Class ABr
Datasheet

Specifications of LM4701T/NOPB

Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
30W x 1 @ 8 Ohm
Voltage - Supply
20 V ~ 64 V, ±10 V ~ 32 V
Features
Depop, Mute, Short-Circuit and Thermal Protection
Mounting Type
Through Hole
Package / Case
TO-220-9 (Bent and Staggered Leads)
Operational Class
Class-AB
Audio Amplifier Output Configuration
1-Channel Mono
Output Power (typ)
30x1@8OhmW
Audio Amplifier Function
Speaker
Input Offset Voltage
15@±28VmV
Input Bias Current
500nA
Total Harmonic Distortion
0.08@8Ohm@30W%
Single Supply Voltage (typ)
18V
Dual Supply Voltage (typ)
±12/±15/±18/±24/±28V
Power Supply Requirement
Single/Dual
Power Dissipation
62.5W
Unity Gain Bandwidth Product (typ)
7.5MHz
Rail/rail I/o Type
No
Power Supply Rejection Ratio
115dB
Single Supply Voltage (min)
20V
Single Supply Voltage (max)
64V
Dual Supply Voltage (min)
±10V
Dual Supply Voltage (max)
±32V
Operating Temp Range
-20C to 85C
Operating Temperature Classification
Commercial
Mounting
Through Hole
Pin Count
9 +Tab
Package Type
TO-220
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*LM4701T
LM4701T
© 2004 National Semiconductor Corporation
LM4701 Overture
30W Audio Power Amplifier with
Mute and Standby Modes
General Description
The LM4701 is an audio power amplifier capable of deliver-
ing typically 30W of continuous average output power into an
8Ω load with less than 0.1% THD+N.
The LM4701 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 LM4701, utilizing its Self Peak In-
stantaneous Temperature (˚Ke) (SPiKe
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 ov-
ervoltage, undervoltage, overloads, including thermal run-
away and instantaneous temperature peaks.
Typical Application
*Optional components dependent upon specific design requirements. Refer
to the External Components Description section for a component functional
description.
SPiKe
FIGURE 1. Typical Audio Amplifier Application Circuit
Protection and Overture
are trademarks of National Semiconductor Corporation.
DS100835
Audio Power Amplifier Series
) protection cir-
10083501
Key Specifications
n THD+N at 1kHz at continuous average output power of
n THD+N from 20Hz to 20kHz at 30W of continuous
n Standby current:
Features
n SPiKe Protection
n Minimal amount of external components necessary
n Quiet fade-in/out mute function
n Power conserving standby-mode
n Non-Isolated 9-lead TO-220 package
n Wide supply range 20V - 66V
Applications
n TVs
n Component stereo
n Compact stereo
Connection Diagram
25W into 8Ω:
average output power into 8Ω:
For Staggered Lead Non-Isolated Package
See NS Package Number TA9A
Order Number LM4701T
Only a 9-Pin Package
Plastic Package
Top View
www.national.com
August 2000
0.1% (max)
0.08% (typ)
2.1mA (typ)
10083502

Related parts for LM4701T/NOPB

LM4701T/NOPB Summary of contents

Page 1

... FIGURE 1. Typical Audio Amplifier Application Circuit SPiKe ™ Protection and Overture ™ are trademarks of National Semiconductor Corporation. © 2004 National Semiconductor Corporation Audio Power Amplifier Series Key Specifications n THD+N at 1kHz at continuous average output power of 25W into 8Ω: n THD+N from 20Hz to 20kHz at 30W of continuous average output power into 8Ω ...

Page 2

... Absolute Maximum Ratings 4) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage | (No Signal) Supply Voltage | (with Input and Load) Common Mode Input Voltage Differential Input Voltage Output Current Power Dissipation (Note 6) ...

Page 3

Electrical Characteristics (Notes 4, 5) The following specifications are for V ply for T = 25˚C. A Symbol Parameter PSRR Power Supply Rejection Ratio (Note 2) CMRR (Note 2) Common Mode Rejection Ratio A (Note 2) Open Loop Voltage Gain ...

Page 4

Test Circuit #1 (Note 2) (DC Electrical Test Circuit) Test Circuit #2 (Note 3) (AC Electrical Test Circuit) www.national.com 10083504 4 10083503 ...

Page 5

Bridged Amplifier Application Circuit FIGURE 2. Bridged Amplifier Application Circuit Single Supply Application Circuit FIGURE 3. Single Supply Amplifier Application Circuit 10083505 10083506 5 www.national.com ...

Page 6

Auxillary Amplifier Application Circuit Equivalent Schematic www.national.com FIGURE 4. Auxillary Amplifier Application Circuit (Excluding Active Protection Circuitry) 6 10083507 10083508 ...

Page 7

External Components Description Components 1 R Prevents currents from entering the amplifier’s non-inverting input which may be passed through to the B load upon power down of the system due to the low input impedance of the circuitry when the ...

Page 8

Typical Performance Characteristics THD + N vs Frequency THD + N vs Frequency THD + N vs Output Power www.national.com THD + N vs Frequency 10083510 THD + N vs Output Power 10083512 THD + N vs Output Power 10083514 ...

Page 9

Typical Performance Characteristics THD + N vs Output Power THD + N vs Output Power Clipping Voltage vs Supply Voltage (Continued) THD + N vs Output Power 10083516 10083518 10083520 9 10083517 Clipping Voltage vs Supply Voltage 10083519 Clipping Voltage ...

Page 10

Typical Performance Characteristics Power Dissipation vs Output Power Power Dissipation vs Output Power Output Power vs Supply Voltage www.national.com (Continued) 10083522 10083524 10083526 10 Power Dissipation vs Ouput Power 10083523 Output Power vs Load Resistance 10083525 Output Mute vs Mute ...

Page 11

Typical Performance Characteristics Pulse Response Output Mute vs Mute Pin Voltage Common-Mode Rejection Ratio (Continued) 10083528 10083530 10083532 11 Large Signal Response 10083529 Power Supply Rejection Ratio 10083531 Open Loop Frequency Response 10083533 www.national.com ...

Page 12

Typical Performance Characteristics Safe Area Supply Current vs Supply Voltage Pulse Thermal Resistance www.national.com (Continued) Spike Protection Response 10083534 10083536 10083538 12 10083535 Pulse Thermal Resistance 10083537 Supply Current vs Output Voltage 10083539 ...

Page 13

Typical Performance Characteristics Pulse Power Limit Supply Current vs Case Temperature Supply Current (I EE Standby Pin Voltage (Continued) 10083540 10083542 ) vs 10083544 13 Pulse Power Limit 10083541 Standby Current ( Standby Pin Voltage 10083543 Input ...

Page 14

Application Information MUTE MODE By placing a logic-high voltage on the mute pin, the signal going into the amplifiers will be muted. If the mute pin is left floating or connected to a logic-low level, the amplifier will be in ...

Page 15

Application Information passing utilizing a large tantalum or electrolytic capacitor (10 µF or larger) which is used to absorb low frequency varia- tions and a small ceramic capacitor (0.1 µF) to prevent any high frequency feedback through the power supply ...

Page 16

Application Information may reduce pops resulting from power supplies that ramp extremely quick or exhibit overshoot during system turn-on. AUDIO POWER AMPLlFIER DESIGN Design a 25W/8Ω Audio Amplifier Given: Power Output Load Impedance Input Level Input Impedance Bandwidth 20 Hz ...

Page 17

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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