UM10340_5
TFA9879 digital input mono Class-D amplifier demo PCB
Rev. 05 — 30 aug. 2011
User manual
Document information
Info
Content
Keywords
Class-D amplifier, Digital input, High efficiency, Filter free
Abstract
This User Manual describes the TFA9879 digital input mono Class-D
demonstration PCB based on NXP Semiconductors’ TFA9879 filter-free
mono BTL Class-D audio amplifier device. The TFA9879 device is
intended for portable applications that support a digital output, which is
less sensitive to external RF fields. The low power consumption will
increase the battery life and an excellent audio performance with high
PSRR is achieved by the integrated feedback loop.
Furthermore the device is very robust due to the integrated protections
like OCP, OTP and several input protections.
The demonstration PCB is designed to operate from a single supply with
a wide supply voltage range of 2.5V…5.5V delivering an output power up
to 1.6W
RMS
in 8
Ω
BTL or 2.7W
RMS
4
Ω
BTL. The application PCB area for
the TFA9879 is very small because only three external components are
required. The demo board is EMC compliant and contains 15kV ESD
protections at the speaker output.
