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LM4914MH-LM4914MHX
1W Monaural, 85mW Stereo Headphone Audio Amplifier
LM4914 Monaural, 85mW Stereo Headphone Audio Amplifier
General DescriptionThe unity-gain stable LM4914is botha mono differential
output (for bridge-tied loads,or BTL) audio power amplifier
anda single-ended (SE) stereo headphone amplifier. Oper-
atingona single5V supply,the mono BTL mode delivers 1W
intoan 8Ω load.In SE stereo mode, the amplifier delivers
85mWto 32Ω loads. The LM4914 features circuitry that
suppresses output transients ("clicks and pops").
The LM4914is designedfor notebook and other handheld
portable applications.It delivers high quality output power
froma surface-mount package and requires few external
components. The LM4914ispin and functionally compatible
withthe TPA0253.
Other features includean active-low micro-power shutdown
mode and thermal shutdown protection.
The LM4914is availableina space efficient 10-lead
exposed-DAP TSSOP package.
Key Specifications BTL output power (RL =8Ω)
VDD=at 3.0V, THD= 0.1%
VDD=at 5.0V, THD= 0.1%
330mW (typ) (typ) SE output power (RL =32Ω)
VDD=at 3.0V, THD= 0.1%
VDD=at 5.0V, THD= 0.1%
30mW (typ)
85mW (typ) Micro-power shutdown supply current 0.03µA (typ) PSRR(f= 1kHz)
VDD=at 3.0V, BTL Mode
VDD=at 5.0V, BTL Mode
52dB (typ)
52dB (typ)
Features Advanced "click and pop" suppression circuitry Stereo headphone amplifier mode Low current micro-power shutdown mode Thermal shutdown protection circuitry 2.5Vto 5.5V operation Unity-gain stable Gainset with external resistors Space-saving exposed-DAP TSSOP package
Applications PDAs Cellular phones Handheld portable electronic devices
Connection Diagram200634A0
Top View
Order Number LM4914MH
SeeNS package Number MXF10AMarch 2003
LM4914
Monaural,
85mW
Stereo
Headphone
Audio
Amplifier
