LM4924 Texas instruments

LM4924

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LM4924

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Описание

The LM4924 is a Output Capacitor-Less (OCL) stereo headphone amplifier, which when connected to a 3.0V supply, delivers 40mW per channel to a 16Ω load with less than 1% THD+N. With the LM4924 packaged in the VSSOP and SON packages, the customer benefits include low profile and small size. These packages minimizes PCB area and maximizes output power. The LM4924 features circuitry that reduces output transients (“clicks” and “pops”) during device turn-on and turn-off, and Mute On and Off. An externally controlled, low-power consumption, active-low shutdown mode is also included in the LM4924. Boomer audio power amplifiers are designed specifically to use few external components and provide high quality output power in a surface mount packages.

2-Cell 1.5V to 3.6V Battery Operation
OCL Mode for Stereo Headphone Operation
Unity-Gain Stable
“Click and Pop” Suppression Circuitry for Shutdown On and Off Transients
Active Low Micropower Shutdown
Thermal Shutdown Protection Circuitry

Key Specifications

OCL Output Power
- (R_L = 16Ω, V_DD = 3.0V, THD+N = 1%),
  40mW (Typ)
Micropower Shutdown Current, 0.1µA (Typ)
Supply Voltage Operating Range,
1.5V < V_DD < 3.6V
PSRR 100Hz, V_DD = 3.0V, A_V = 2.5, 66dB (Typ)

Boomer is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

Output power (W)	0.04
Analog supply (min) (V)	1.5
Analog supply (max) (V)	3.6
Load (min) (Ω)	16
PSRR (dB)	66
Rating	Catalog
Operating temperature range (°C)	-40 to 85
Headphone channels	Stereo
Volume control	No
Shutdown current (ISD) (µA)	0.1
Architecture	Class-AB (ground-centered)
Iq per channel (typ) (mA)	0.75