LM4702TABD National Semiconductor, LM4702TABD Datasheet

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LM4702TABD

Manufacturer Part Number
LM4702TABD
Description
BOARD EVALUATION LM4702TA
Manufacturer
National Semiconductor
Datasheet

Specifications of LM4702TABD

Amplifier Type
Class AB
Output Type
2-Channel (Stereo)
Max Output Power X Channels @ Load
300W x 2 @ 8 Ohm
Voltage - Supply
±20 V ~ 100 V
Operating Temperature
-20°C ~ 75°C
Board Type
Fully Populated
Utilized Ic / Part
LM4702
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
© 2006 National Semiconductor Corporation
LM4702 Audio Power Amplifier Series
Stereo High Fidelity 200 Volt Driver with Mute
General Description
The LM4702 is a high fidelity audio power amplifier driver
designed for demanding consumer and pro-audio applica-
tions. Amplifier output power may be scaled by changing the
supply voltage and number of output devices. The LM4702
is capable of delivering in excess of 300 watts per channel
single ended into an 8 ohm load in the presence of 10% high
line headroom and 20% supply regulation.
The LM4702 includes thermal shut down circuitry that acti-
vates when the die temperature exceeds 150˚C. The
LM4702’s mute function, when activated, mutes the input
drive signal and forces the amplifier output to a quiescent
state.
The LM4702 is available in 3 grades that span a wide range
of applications and performance levels. The LM4702C is
targeted at high volume applications. The LM4702B includes
a higher voltage rating along with the tighter specifications.
The LM4702A* (in development) is the premium part with the
highest voltage rating, fully specified with limits over voltage
and temperature, and is offered in a military 883 compliant
TO-3 package.
* Tentative Max Operating voltage for the LM4702A (in de-
velopment)
Typical Application and Connection Diagrams
Overture
FIGURE 1. Typical Audio Amplifier Application Circuit
®
is a registered trademark of National Semiconductor Corporation.
DS201583
20158319
Key Specifications
Features
n Very high voltage operation
n Scalable output power
n Minimum external components
n External compensation
n Thermal Shutdown and Mute
Applications
n AV receivers
n Audiophile power amps
n Pro Audio
n High voltage industrial applications
j
j
j
j
LM4702A* (in development)
LM4702B
LM4702C
Wide operating voltage range
Equivalent Noise
PSRR
THD+N (A and B Grades)
Plastic Package — 15 Lead TO-220
(for LM4702A, in development)
(for LM4702BTA, LM4702CTA)
Metal Can — 15 Lead TO-3
20158302
20158320
September 2006
±
±
±
20V to
20V to
20V to
www.national.com
110dB (typ)
0.0003%
±
±
±
100V
100V
3µV
75V

Related parts for LM4702TABD

LM4702TABD Summary of contents

Page 1

... Tentative Max Operating voltage for the LM4702A (in de- velopment) Typical Application and Connection Diagrams FIGURE 1. Typical Audio Amplifier Application Circuit Overture ® registered trademark of National Semiconductor Corporation. © 2006 National Semiconductor Corporation Key Specifications j Wide operating voltage range LM4702A* (in development) LM4702B ...

Page 2

Typical Application and Connection Diagrams FIGURE 1. Typical Audio Amplifier Application Circuit www.national.com (Continued) 2 20158319 ...

Page 3

Connection Diagram Plastic Package (For B and C) (Note 13) Top View Order Number LM4702BTA, LM4702CTA See NS Package Number TA15A 3 20158301 www.national.com ...

Page 4

... Absolute Maximum Ratings 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications Supply Voltage | Part A, B Parts Differential Input Voltage Common Mode Input Range Power Dissipation (Note 3) ESD Susceptibility (Note 4) ESD Susceptibility (Note 5) ...

Page 5

Electrical Characteristics (LM4702C) Vcc = +50V, Vee = –50V 2) (Continued) The following specifications apply for I Symbol Parameter R Input Bias Resistor S Av Closed Loop Voltage Gain Av open Open Loop Gain Vom Output Voltage Swing Vnoise Output ...

Page 6

Electrical Characteristics (LM4702A) Vcc = +100V, Vee = –100V (Pre-release information) The following specifications apply for I Symbol Parameter Total Quiescent Power Supply I CC Current Total Harmonic Distortion + THD+N Noise R Input Bias Resistor S Av Closed Loop ...

Page 7

Typical Performance Characteristics for LM4702C THD+N vs Output Voltage ± 50V 1kHz, outputs shorted DD THD+N vs Frequency ± 50V 10Vrms, outputs shorted DD OUT Crosstalk vs Frequency ± 50V ...

Page 8

Typical Performance Characteristics for LM4702C +PSRR vs Frequency ± 50V 1kΩ, Ripple +PSRR vs Frequency ± 75V 1kΩ, Ripple Open Loop and Phase Upper-Phase, ...

Page 9

Typical Performance Characteristics for LM4702B THD+N vs Output Voltage V = 100V DD PSRR vs Frequency V = 100V DD THD+N vs Frequency V = 100V 20158341 X B grade Demo Amp 20158343 9 = 30V OUT RMS ...

Page 10

Test Circuit www.national.com FIGURE 1. 10 20158303 ...

Page 11

Application Information MUTE FUNCTION The mute function of the LM4702 is controlled by the amount of current that flows into the mute pin. If there is less than 1mA of current flowing into the mute pin, the part will be ...

Page 12

Application Information bias point on the amplifier’s input terminal. The resulting -3dB frequency response due to the combination can be found from Equation (5) shown below (2π With ...

Page 13

LM4702 Demo Board Artwork Top Overlay 20158330 Top Layer 20158329 13 www.national.com ...

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LM4702 Demo Board Artwork www.national.com (Continued) Bottom Layer 14 20158328 ...

Page 15

Revision History Rev 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Date 8/31/05 9/09/05 Taken out Limits on Vom (under the +75V and +50V). 9/14/05 Changed Overture R) in the 03/08/06 04/26/04 Edited Limit values on the ...

Page 16

... BANNED SUBSTANCE COMPLIANCE National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C2) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/quality/green. ...

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