LM4916 Texas instruments

LM4916

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LM4916

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Описание

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.

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

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)

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Output power (W)	0.085
Analog supply (min) (V)	0.9
Analog supply (max) (V)	2.5
Load (min) (Ω)	8
PSRR (dB)	66
Rating	Catalog
Operating temperature range (°C)	-40 to 85
Headphone channels	Stereo
Volume control	No
Shutdown current (ISD) (µA)	0.02
Architecture	Class-AB
Iq per channel (typ) (mA)	0.5