Datasheet

Description STA559BW
8/67 Doc ID 18190 Rev 1
1 Description
The STA559BW is an integrated solution of digital audio processing, digital amplifier
controls and power output stage to create a high-power single-chip FFX digital amplifier with
high-quality and high-efficiency. Three channels of FFX processing are provided. The FFX
processor implements the ternary, binary and binary differential processing capabilities of
the full FFX processor.
The STA559BW is part of the Sound Terminal
®
family that provides full digital audio
streaming to the speakers and offers cost effectiveness, low power dissipation and sound
enrichment.
The power section consists of four independent half-bridges. These can be configured via
digital control to operate in different modes.
For example, 2.1 channels can be provided by two half bridges and a single full bridge,
supplying up to 2 x 1.4 W + 1 x 6 W of output power or two channels can be provided by two
full-bridges, supplying up to 2 x 3 W of output power.
The IC can also be configured as 2.1 channels with 2 x 20 W supplied by the device plus a
drive for an external FFX power amplifier, such as STA533WF or STA515W.
Also provided in the STA559BW are a full assortment of digital processing features. This
includes up to four programmable biquads (EQ) per channel. Available presets enable a
time-to-market advantage by substantially reducing the amount of software development
needed for functions such as audio preset volume loudness, preset volume curves and
preset EQ settings. There are also new advanced AM radio interference reduction modes.
Figure 1. Block diagram
Protection
current/thermal
Logic
Regulators
Bias
Power
control
FFX
PLL
Volume
control
Channel
1A
Channel
1B
Channel
2A
Channel
2B
I
2
S
interface
PowerDigital DSP
I
2
C