EUA5312
2-W Stereo Audio Power Amplifier
with Four Selectable Gain Settings
DESCRIPTOIN
The EUA5312 is a stereo audio power amplifier. When
driving 1 W into 8–Ω speakers, the EUA5312 has less than
0.8% THD+N across its specified frequency range. Included
within this device is integrated depop circuitry that virtually
eliminates transients that cause noise in the speakers.
Amplifier gain is internally configured and controlled by way
of two terminals (GAIN0 and GAIN1). BTL gain settings of 6
dB, 10 dB, 15.6 dB, and 21.6 dB are provided, while SE
gain is always configured as 4.1 dB for headphone drive. An
internal input MUX allows two sets of stereo inputs to the
amplifier .The
HP/LINE terminal allows the user to select
which MUX input is active, regardless of whether the
amplifier is in SE or BTL mode. In notebook applications,
where internal speakers are driven as BTL and the line outputs
(often headphone drive) are required to be SE, the EUA5312
automatically switches into SE mode when the SE/ BTL input
is activated, and this reduces the gain to 4.1 dB.
The EUA5312 consumes only 6mA of supply current during
normal operation.
FEATURES
2W per Channel Output Power Into 3-Ω Load
Internal Gain Control, Which Eliminates
External Gain-Setting Components
Input MUX Select Terminal
PC-Beep Input
Depop Circuitry Integrated
Two Input Modes Allowable with Single-Ended or
Fully Differential Input
Low Supply Current and Shutdown Current
Thermal Shutdown Protection
TSSOP-24 with Thermal Pad
RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
Notebook Computers
Multimedia Monitors
Digital Radios and Portable TVs
Block Diagram
DS5312 Ver 1.7 May. 2005
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
