LM4952TSX/NOPB National Semiconductor, LM4952TSX/NOPB Datasheet

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LM4952TSX/NOPB

Manufacturer Part Number
LM4952TSX/NOPB
Description
IC AMP AUDIO PWR 3.8W AB TO263-9
Manufacturer
National Semiconductor
Series
Boomer®r
Type
Class ABr
Datasheet

Specifications of LM4952TSX/NOPB

Output Type
2-Channel (Stereo)
Max Output Power X Channels @ Load
3.8W x 2 @ 4 Ohm
Voltage - Supply
9.6 V ~ 16 V
Features
Depop, Short-Circuit and Thermal Protection, Shutdown, Volume Control
Mounting Type
Surface Mount
Package / Case
TO-263-9 (9 leads + tab)
Operational Class
Class-AB
Audio Amplifier Output Configuration
2-Channel Stereo
Output Power (typ)
3.8x2@4OhmW
Audio Amplifier Function
Speaker
Total Harmonic Distortion
0.08@4Ohm@2W%
Single Supply Voltage (typ)
12/15V
Dual Supply Voltage (typ)
Not RequiredV
Power Supply Requirement
Single
Rail/rail I/o Type
No
Power Supply Rejection Ratio
89dB
Single Supply Voltage (min)
9.6V
Single Supply Voltage (max)
16V
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
9 +Tab
Package Type
TO-263
For Use With
LM4952TSBD - BOARD EVALUATION LM4952TS
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM4952TSX
© 2004 National Semiconductor Corporation
LM4952
3.1W Stereo-SE Audio Power Amplifier
with DC Volume Control
General Description
The LM4952 is a dual audio power amplifier primarily de-
signed for demanding applications in flat panel monitors and
TV’s. It is capable of delivering 3.1 watts per channel to a 4Ω
single-ended load with less than 1% THD+N when powered
by a 12V
Eliminating external feedback resistors, an internal, DC-
controlled, volume control allows easy and variable gain
adjustment.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4952 does not require boot-
strap capacitors or snubber circuits. Therefore, it is ideally
suited for display applications requiring high power and mini-
mal size.
The LM4952 features a low-power consumption active-low
shutdown mode. Additionally, the LM4952 features an inter-
nal thermal shutdown protection mechanism along with short
circuit protection.
The LM4952 contains advanced pop & click circuitry that
eliminates noises which would otherwise occur during
turn-on and turn-off transitions.
Connection Diagram
Boomer
®
is a registered trademark of National Semiconductor Corporation.
DC
power supply.
DS200809
See NS Package Number TS9A
Z = Assembly Plant Code
Order Number LM4952TS
L4952TS = LM4952TS
TT = Die Traceability
U = Wafer Fab Code
XY = Date Coce
Top View
Key Specifications
Features
n Pop & click circuitry eliminates noise during turn-on and
n Low current, active-low shutdown mode
n Low quiescent current
n Stereo 3.8W output, R
n DC-controlled volume control
n Short circuit protection
Applications
n Flat Panel Monitors
n Flat panel TV’s
n Computer Sound Cards
j
j
j
turn-off transitions
Quiscent Power Supply Current
P
Shutdown current
OUT
V
DD
= 12V, R
200809E9
L
= 4Ω, 10% THD+N
L
= 4Ω
www.national.com
August 2004
18mA (typ)
3.8W (typ)
55µA (typ)

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LM4952TSX/NOPB Summary of contents

Page 1

... The LM4952 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. Connection Diagram Boomer ® registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation Key Specifications j Quiscent Power Supply Current j P ...

Page 2

Typical Application FIGURE 1. Typical LM4952 SE Audio Amplifier Application Circuit www.national.com 2 200809E8 ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (pin 6, referenced to GND, pins 4 and 5) Storage Temperature Input Voltage pins 4, 6, and 7 pins and 9 Power Dissipation (Note 3) ESD Susceptibility (Note 4) ...

Page 4

Electrical Characteristics for Volume Control The following specifications apply for V Symbol Parameter VOL Gain max VOL Gain min A Mute Attenuation M Note 1: All voltages are measured with respect to the GND pin, unless otherwise specified. Note 2: ...

Page 5

Typical Performance Characteristics THD+N vs Frequency V = 12V 4Ω 2W 1.0µF OUT IN THD+N vs Output Power V = 12V 4Ω 1kHz ...

Page 6

Typical Performance Characteristics (Continued) Output Power vs Power Supply Voltage R = 4Ω 1kHz L IN both channels driven and loaded (average shown), at (from top to bottom at 12V): THD+N = 10%, THD Power Supply ...

Page 7

Typical Performance Characteristics (Continued) Channel-to-Channel Crosstalk vs Frequency V = 12V 8Ω 1W, Input Referred DD L OUT at (from top to bottom at 1kHz measured, V driven, V OUTA INA Amplifier Gain vs ...

Page 8

Typical Performance Characteristics (Continued) THD+N vs Output Power V = 9.6V 1kHz IN Output Power vs Load Resistance V = 9.6V 1kHz (from top to bottom at 15Ω): THD+N = ...

Page 9

Typical Performance Characteristics (Continued) THD+N vs Frequency V = 14V 4Ω 2W 1.0µF OUT IN THD+N vs Output Power V = 14V 4Ω 1kHz IN Power ...

Page 10

Typical Performance Characteristics (Continued) THD+N vs Output Power V = 15V, at (from top to bottom at 15Ω): DD THD+N = 10%, THD+N = 1%, f Channel-to-Channel Crosstalk vs Frequency V = 16V 4Ω 1W, Input ...

Page 11

Typical Performance Characteristics (Continued) Clipping Voltage vs Power Supply Voltage R = 8Ω 1kHz (from to bottom at 12.5V): positive signal swing, negative signal swing Power Dissipation vs Ambient Temperature V = 12V ...

Page 12

Application Information HIGH VOLTAGE BOOMER WITH INCREASED OUTPUT POWER Unlike previous 5V Boomer ® amplifiers, the LM4952 is de- signed to operate over a power supply voltages range of 9.6V to 16V. Operating on a 12V power supply, the LM4952 ...

Page 13

Application Information power dissipation is a function of output power, higher am- bient temperatures are allowed as output power or duty cycle decreases. If the result of Equation (1) is greater than that of Equation (2), then decrease the supply ...

Page 14

Application Information soft. Since the gain is not critical, there may be a volume variation from part-to-part even with the same applied DC volume control voltage. The gain of a given LM4952 can be set with fixed external voltage, but ...

Page 15

Application Information seen by the DC Vol input. Though attenuated by the voltage divider action of the potentiometer and the series resistor, these fluctuations may cause perturbations in the perceived volume. An easy and simple solution that suppresses these perturbations ...

Page 16

Application Information manner, the ground lead of the capacitor connected between the BYPASS pin and GND should also be connected to the package’s grounded tab. OPTIMIZING CLICK AND POP REDUCTION PERFORMANCE The LM4952 contains circuitry that eliminates turn-on and shutdown ...

Page 17

Demonstration Board Layout FIGURE 11. Recommended TS SE PCB Layout: FIGURE 12. Recommended TS SE PCB Layout: 200809F2 Top Silkscreen 200809F4 Top Layer 17 www.national.com ...

Page 18

Demonstration Board Layout www.national.com (Continued) FIGURE 13. Recommended TS SE PCB Layout: Bottom Layer 18 200809F3 ...

Page 19

Physical Dimensions inches (millimeters) unless otherwise noted Order Number LM4952TS NS Package Number TS9A 19 www.national.com ...

Page 20

... 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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