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LM4916LD Datasheet

  • LM4916LD

  • National Semiconductor [1.5V, Mono 85mW BTL Output, 14mW St...

  • NSC

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LM4916 1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier
July 2003
LM4916
1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone
Audio Amplifier
General Description
The unity gain stable LM4916 is both a mono differential
output (for bridge-tied loads or BTL) audio power amplifier
and a Single Ended (SE) stereo headphone amplifier. Oper-
ating on a single 1.5V supply, the mono BTL mode delivers
85mW into an 8鈩?load at 1% THD+N. In Single Ended stereo
headphone mode, the amplifier delivers 14mW per channel
into a 16鈩?load at 1% THD+N.
With the LM4916 packaged in the MM and LLP packages,
the customer benefits include low profile and small size.
These packages minimize PCB area and maximizes output
power.
The LM4916 features circuitry that reduces output transients
("clicks" and "pops") during device turn-on and turn-off, an
externally controlled, low-power consumption, active-low
shutdown mode, and thermal shutdown. Boomer audio
power amplifiers are designed specifically to use few exter-
nal components and provide high quality output power in a
surface mount package.
Key Specifications
n
n
n
n
n
n
n
Mono-BTL output power
(R
L
= 8鈩? V
DD
= 1.5V, THD+N = 1%)
85mW (typ)
Stereo Headphone output power
(R
L
= 16鈩? V
DD
= 1.5V, THD+N = 1%)
14mW (typ)
Micropower shutdown current
0.02碌A(chǔ) (typ)
Supply voltage operating range
0.9V
<
V
DD
<
2.5V
PSRR 1kHz, V
DD
= 1.5V
66dB (typ)
Features
n
Single-cell 0.9V to 2.5V battery operation
n
BTL mode for mono speaker
n
Single ended headphone operation with coupling
capacitors
n
Unity-gain stable
n
"Click and pop" suppression circuitry
n
Active low micropower shutdown
n
Low current, active-low mute mode
n
Thermal shutdown protection circuitry
Applications
n
Portable one-cell audio products
n
Portable one-cell electronic devices
Typical Application
20048701
FIGURE 1. Block Diagram
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 2003 National Semiconductor Corporation
DS200487
www.national.com

LM4916LD 產(chǎn)品屬性

  • National Semiconductor (TI)

  • Class-AB

  • 0.085 W x 1 at 8 Ohms, 0.014 W x 2 at 16 Ohms

  • 1-Channel Mono, 2-Channel Stereo

  • 0.1 %

  • + 85 C

  • LLP EP

  • Reel

  • 16 Ohms

  • Single

  • - 40 C

  • Differential, Single

  • Single

  • 2.5 V

  • 0.9 V

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