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LM4950TS Datasheet

  • LM4950TS

  • National Semiconductor [7.5W Mono-BTL or 3.1W Stereo Audio ...

  • 1441.07KB

  • NSC

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LM4950 7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier
August 2004
LM4950
7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier
General Description
The LM4950 is a dual audio power amplifier primarily de-
signed for demanding applications in flat panel monitors and
TV鈥檚. It is capable of delivering 3.1 watts per channel to a 4鈩?/div>
single-ended load with less than 1% THD+N or 7.5 watts
mono BTL to an 8鈩?load, with less than 10% THD+N from a
12V
DC
power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. The LM4950 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 LM4950 features a low-power consumption active-low
shutdown mode. Additionally, the LM4950 features an inter-
nal thermal shutdown protection mechanism along with short
circuit protection.
The LM4950 contains advanced pop & click circuitry that
eliminates noises which would otherwise occur during
turn-on and turn-off transitions.
The LM4950 is a unity-gain stable and can be configured by
external gain-setting resistors.
Key Specifications
j
Quiscent Power Supply Current
j
P
OUT
(SE)
16mA (typ)
3.1W (typ)
7.5W (typ)
40碌A (typ)
V
DD
= 12V, R
L
= 4鈩? 1% THD+N
j
P
OUT
(BTL)
V
DD
= 12V, R
L
= 8鈩? 10% THD+N
j
Shutdown current
Features
n
Pop & click circuitry eliminates noise during turn-on and
turn-off transitions
n
Low current, active-low shutdown mode
n
Low quiescent current
n
Stereo 3.1W output, R
L
= 4鈩?/div>
n
Mono 7.5W BTL output, R
L
= 8鈩?/div>
n
Short circuit protection
n
Unity-gain stable
n
External gain configuration capability
Applications
n
Flat Panel Monitors
n
Flat panel TV鈥檚
n
Computer Sound Cards
Typical Application
20047078
FIGURE 1. Typical Bridge-Tied-Load (BTL) Audio Amplifier Application Circuit
Boomer
庐
is a registered trademark of National Semiconductor Corporation.
漏 2004 National Semiconductor Corporation
DS200470
www.national.com

LM4950TS 产品属性

  • National Semiconductor (TI)

  • Class-AB

  • 7.5 W x 1 at 8 Ohms, 3.1 W x 2 at 4 Ohms

  • 1-Channel Mono, 2-Channel Stereo

  • 0.05 %

  • 12 V, 15 V

  • + 85 C

  • SMD/SMT

  • TO-263

  • Tube

  • 8 Ohms

  • 30 mV at 12 V

  • Single

  • - 40 C

  • Differential, Single

  • 45

  • Single

  • 16 V

  • 9.6 V

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