LM4916 Datasheet, PDF (1/24 Pages) National Semiconductor (TI) – 1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier

LM4916
www.ti.com
SNAS179E – MAY 2003 – REVISED MAY 2013
LM4916
1.5V, Mono 85mW BTL Output, 14mW Stereo
Headphone Audio Amplifier
Check for Samples: LM4916
FEATURES
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•2 Single-Cell 0.9V to 2.5V Battery Operation
• BTL Mode for Mono Speaker
• Single-Ended Headphone Operation with
Coupling Capacitors
• Unity-Gain Stable
• "Click and Pop" Suppression Circuitry
• Active-Low Micropower Shutdown
• Low Current, Active-Low Mute Mode
• Thermal Shutdown Protection Circuitry
APPLICATIONS
• Portable One-Cell Audio Products
• Portable One-Cell Electronic Devices
KEY SPECIFICATIONS
• Mono-BTL Output Power
• (R_L=8Ω, V_DD=1.5V, THD+N=1%), 85mW (typ)
• Stereo Headphone Output Power
• (R_L=16Ω, V_DD=1.5V, THD+N=1%), 14mW (typ)
• Micropower Shutdown Current, 0.02µA (typ)
• Supply Voltage Operating Range,
0.9V<V_DD<2.5V
• PSRR 1kHz, V_DD=1.5V, 66dB (typ)
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. Operating on a single 1.5V
supply, the mono BTL mode delivers 85mW into an
8Ω load at 1% THD+N. In Single Ended stereo
headphone mode, the amplifier delivers 14mW per
channel into a 16Ω load at 1% THD+N.
With the LM4916 packaged in the MM and WSON
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 external components
and provide high quality output power in a surface
mount package.
Typical Application
Figure 1. Block Diagram
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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