LM4700TF/NOPB National Semiconductor, LM4700TF/NOPB Datasheet

IC AMP AUDIO PWR 30W AB TO220-11

LM4700TF/NOPB

Manufacturer Part Number
LM4700TF/NOPB
Description
IC AMP AUDIO PWR 30W AB TO220-11
Manufacturer
National Semiconductor
Series
Overture™r
Type
Class ABr
Datasheet

Specifications of LM4700TF/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
Mute, Short-Circuit and Thermal Protection, Standby
Mounting Type
Through Hole
Package / Case
TO-220-11 (Bent and Staggered Leads)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*LM4700TF
*LM4700TF/NOPB
LM4700TF
© 2004 National Semiconductor Corporation
LM4700
Overture
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
8Ω load 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
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
Protection and Overture
Audio Power Amplifier Series
are trademarks of National Semiconductor Corporation.
FIGURE 1. Typical Audio Amplifier Application Circuit
DS012369
) protection cir-
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 Isolated 11-lead TO-220 package
n Wide supply range 20V - 66V
Applications
n Component stereo
n Compact stereo
25W into 8Ω:
average output power into 8Ω:
01236901
www.national.com
August 2000
0.1% (max)
0.08% (typ)
2.1mA (typ)

Related parts for LM4700TF/NOPB

LM4700TF/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 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

Connection Diagram See NS Package Number TF11B for Staggered Lead Isolated Package See TA11B for Staggered Lead Non-Isolated Package www.national.com Isolated Plastic Package 01236902 Top View Order Number LM4700TF or LM4700T 2 ...

Page 3

... Absolute Maximum Ratings 5) 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 4

... Increased power dissipation will require a larger heat sink as explained in the Application Information section. Note 14: Preliminary engineering evaluation of θ data to this point. Please contact your local National Semiconductor sales representative for more information. www.national.com (Continued) = +28V − ...

Page 5

Test Circuit #1 (Note 2) (DC Electrical Test Circuit) Test Circuit #2 (Note 3) (AC Electrical Test Circuit) 01236904 5 01236903 www.national.com ...

Page 6

Bridged Amplifier Application Circuit Single Supply Application Circuit FIGURE 3. Single Supply Amplifier Application Circuit www.national.com FIGURE 2. Bridged Amplifier Application Circuit 6 01236905 01236906 ...

Page 7

Auxillary Amplifier Application Circuit FIGURE 4. Auxillary Amplifier Application Circuit 7 01236907 www.national.com ...

Page 8

Equivalent Schematic Protection Circuitry) www.national.com (Excluding Active 8 01236908 ...

Page 9

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 10

Typical Performance Characteristics THD + N vs Frequency THD + N vs Frequency THD + N vs Output Power www.national.com THD + N vs Frequency 01236910 THD + N vs Output Power 01236912 THD + N vs Output Power 01236914 ...

Page 11

Typical Performance Characteristics THD + N vs Output Power THD + N vs Output Power Clipping Voltage vs Supply Voltage (Continued) THD + N vs Output Power 01236916 01236918 01236920 11 01236917 Clipping Voltage vs Supply Voltage 01236919 Clipping Voltage ...

Page 12

Typical Performance Characteristics Power Dissipation vs Output Power Power Dissipation vs Output Power Output Power vs Supply Voltage www.national.com (Continued) 01236922 01236924 01236926 12 Power Dissipation vs Ouput Power 01236923 Output Power vs Load Resistance 01236925 Output Mute vs Mute ...

Page 13

Typical Performance Characteristics Pulse Response Output Mute vs Mute Pin Voltage Common-Mode Rejection Ratio (Continued) 01236928 01236930 01236932 13 Large Signal Response 01236929 Power Supply Rejection Ratio 01236931 Open Loop Frequency Response 01236933 www.national.com ...

Page 14

Typical Performance Characteristics Safe Area Supply Current vs Supply Voltage Pulse Thermal Resistance www.national.com (Continued) Spike Protection Response 01236934 01236936 01236938 14 01236935 Pulse Thermal Resistance 01236937 Supply Current vs Output Voltage 01236939 ...

Page 15

Typical Performance Characteristics Pulse Power Limit Supply Current vs Case Temperature Supply Current (I EE Standby Pin Voltage (Continued) 01236940 01236942 ) vs 01236944 15 Pulse Power Limit 01236941 Standby Current ( Standby Pin Voltage 01236943 Input ...

Page 16

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 17

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 18

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 19

... 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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