Etek Microelectronics
ETK4992
1.25 Watt Fully Differential Audio Power Amplifier
General Description
The ETK4992 is a...
Etek Microelectronics
ETK4992
1.25 Watt Fully Differential Audio Power Amplifier
General Description
The ETK4992 is a fully differential audio power amplifier designed for portable communication device applications. It is capable of delivering 1.25 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5V battery
voltage. It operates from 2.2 to 5.5V.
Features like 90dB PSRR at 217Hz, improved RF-rectification immunity, the space-saving 8-bump WLCSP package, the advanced pop & click circuitry, a minimal count of external components and low-power shutdown mode make ETK4992 ideal for wireless handsets.
The ETK4992 is unity-gain stable, and the gain can be configured by external resistors.
Features
z Fully differential amplifier
z Improved PSRR at 217Hz (VDD>3.0V)
90dB (typ)
z Power output at 5.0V & 1% THD&8Ω
1.25W (typ)
z Power output at 5.0V & 1% THD&4Ω
2.25W (typ)
z Power output at 4.2V & 1% THD&8Ω
0.92W (typ)
z Power output at 4.2V & 1% THD&4Ω
1.56W (typ)
z Power output at 3.6V & 1% THD&8Ω
0.7W (typ)
z Power output at 3.6V & 1% THD&4Ω
1.1W (typ)
z Ultra low shutdown current
0.01μA (typ)
z Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions
z Thermal overload protection circuitry
z No output coupling
capacitors, bootstrap
capacitors required
z Unity-gain stable
z External gain configuration capability
z Available in space-saving package: 8-bump WLCSP
Applications
z Wireles...