LM4730TA/NOPB National Semiconductor, LM4730TA/NOPB Datasheet

IC AMP AUDIO PWR 14W AB TO220-15

LM4730TA/NOPB

Manufacturer Part Number
LM4730TA/NOPB
Description
IC AMP AUDIO PWR 14W AB TO220-15
Manufacturer
National Semiconductor
Type
Class ABr
Datasheet

Specifications of LM4730TA/NOPB

Output Type
2-Channel (Stereo)
Max Output Power X Channels @ Load
14W x 2 @ 8 Ohm
Voltage - Supply
20 V ~ 50 V, ±10 V ~ 25 V
Features
Depop, Mute, Short-Circuit and Thermal Protection
Mounting Type
Through Hole
Package / Case
TO-220-15 (Bent and Staggered Leads)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*LM4730TA/NOPB
LM4730TA
© 2009 National Semiconductor Corporation
Stereo 14W Audio Power Amplifier with Mute and Standby
Modes
General Description
The LM4730 is a stereo audio amplifier capable of delivering
typically 14W per channel of continuous average output pow-
er into a 4Ω or 8Ω load with less than 10% THD+N from 20Hz
- 20kHz.
Each amplifier has an independent smooth transition fade-in/
out mute and a power conserving standby mode which can
be controlled by external logic.
The LM4730 has short circuit protection and a thermal shut
down feature that is activated when the die temperature ex-
ceeds 150°C. The LM4730 also has a under voltage lock out
feature for click and pop free power off and on.
The LM4730 has a wide operating supply range from +/-10V
- +/-25V allowing for lower cost unregulated power supplies
to be used.
Connection Diagrams
See NS Package Number TA15A
Plastic Package
Order Number LM4730TA
Non-Isolated Package
Top View
200594 Version 3 Revision 2
(Note
200594
12)
20059452
LM4730
Print Date/Time: 2009/10/26 15:41:58
Key Specifications
Features
Applications
Output power into 4Ω or 8Ω, 10% THD+N
THD+N at 1kHz with 2 X 1W into 8Ω
Mute Attenuation
PSRR with f
Slew Rate
Standby Current (+/-17V)
Minimal amount of external components necessary
Quiet fade-in/out mute mode
Low current Standby-mode
Audio amplifier for high-end stereo TVs
Audio amplifier for component stereo
Audio amplifier for compact stereo
Audio amplifier for PC satellite speaker systems
Audio amplifier for self powered speakers
TO-220 Top Marking (Note 12)
RIPPLE
Z - Assembly Plant Code
LM4730TA - LM4730TA
TT - Die Traceability
U - Wafer Fab Code
XY - Date Code
= 120Hz, V
Top View
RIPPLE
= 1V
OBSOLETE
20059474
October 26, 2009
RMS
www.national.com
18V/µs (typ)
3.5mA (typ)
0.02% (typ)
85dB (typ)
50dB (typ)
14W (typ)

Related parts for LM4730TA/NOPB

LM4730TA/NOPB Summary of contents

Page 1

... Connection Diagrams (Note Plastic Package Top View Non-Isolated Package Order Number LM4730TA See NS Package Number TA15A © 2009 National Semiconductor Corporation 200594 Version 3 Revision 2 LM4730 Key Specifications ■ Output power into 4Ω or 8Ω, 10% THD+N ■ THD+N at 1kHz with into 8Ω ...

Page 2

Typical Application www.national.com FIGURE 1. Typical Audio Amplifier Application Circuit 2 200594 Version 3 Revision 2 Print Date/Time: 2009/10/26 15:41:58 20059453 ...

Page 3

... 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 | Common Mode Input Voltage Differential Input Voltage Output Current Power Dissipation (Note 3) ESD Susceptability (Note 4) ESD Susceptability (Note ...

Page 4

Symbol Parameter Mute V Mute Low Input Voltage IL V Mute High Input Voltage IH Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified. Note 2: Absolute Maximum Ratings indicate limits beyond which damage ...

Page 5

Bridged Amplifier Application Circuit FIGURE 2. Bridged Amplifier Application Circuit 200594 Version 3 Revision 2 5 Print Date/Time: 2009/10/26 15:41:58 20059405 www.national.com ...

Page 6

Single Supply Application Circuit Note: *Optional components dependent upon specific design requirements. Auxiliary Amplifier Application Circuit www.national.com FIGURE 3. Single Supply Amplifier Application Circuit FIGURE 4. Special Audio Amplifier Application Circuit 6 200594 Version 3 Revision 2 Print Date/Time: 2009/10/26 ...

Page 7

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

Page 8

Typical Performance Characteristics Supply Current vs Supply Voltage THD+N vs Frequency ±14V 1W/Channel 4Ω, 80kHz www.national.com 20059467 20059468 8 200594 Version 3 Revision 2 Print Date/Time: 2009/10/26 15:41:58 PSRR vs Frequency ±17V, V ...

Page 9

THD+N vs Output Power = 4Ω, 80kHz BW ±14V 20059470 Output Power vs Supply Voltage = 4Ω, 80kHz 1kHz 20059462 200594 Version 3 Revision 2 THD+N vs Output Power = 8Ω, 80kHz BW ...

Page 10

Power Dissipation vs Output Power = 4Ω, 80kHz BW 1% THD (max Crosstalk vs Frequency ±14V 10W 4Ω, 80kHz www.national.com 20059460 20059472 10 200594 Version 3 Revision 2 Print Date/Time: 2009/10/26 ...

Page 11

Mute Attenuation vs Mute Pin Voltage ±17V 1W 8Ω, 80kHz 20059459 Supply Current vs Standby Pin Voltage ±17V 20059466 200594 Version 3 Revision 2 Standby Attenuation vs Standby Pin Voltage ±17V ...

Page 12

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

Page 13

If adequate bypassing is not provided, the current in the sup- ply leads which is a rectified component of the load current ...

Page 14

To achieve a transient free power-up and power-down, the voltage seen at the input terminals should be ideally the same. Such a signal will be common-mode in nature, and will be rejected by the LM4730. In Figure 3, the resistor ...

Page 15

FIGURE 6. Reference PCB Schematic 15 200594 Version 3 Revision 2 Print Date/Time: 2009/10/26 15:41:58 20059458 www.national.com ...

Page 16

LM4730 REFERENCE BOARD ARTWORK Composite View Top Layer www.national.com 20059454 20059456 16 200594 Version 3 Revision 2 Print Date/Time: 2009/10/26 15:41:58 Silk Screen 20059455 Bottom Layer 20059457 ...

Page 17

BILL OF MATERIALS FOR REFERENCE PCB Symbol Value Toleranc 47kΩ IN1 IN2 1kΩ 20kΩ 1kΩ 4.7Ω R ...

Page 18

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted Non-Isolated TO-220 15-Lead Package Order Number LM4730TA NS Package Number TA15A 18 200594 Version 3 Revision 2 Print Date/Time: 2009/10/26 15:41:58 ...

Page 19

Notes 19 200594 Version 3 Revision 2 Print Date/Time: 2009/10/26 15:41:58 www.national.com ...

Page 20

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

Related keywords