1FEATURES

23• 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

APPLICATIONS

• Portable Two-Cell Audio Products

• Portable Two-Cell Electronic Devices

KEY SPECIFICATIONS

• OCL Output Power

– (RL = 16Ω, VDD = 3.0V, THD+N = 1%),

40mW (Typ)

• Micropower Shutdown Current, 0.1μA (Typ)

• Supply Voltage Operating Range,

1.5V < VDD < 3.6V

• PSRR 100Hz, VDD = 3.0V, AV = 2.5, 66dB (Typ)

DESCRIPTION

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.