Features
 Maximum output: > 2.5 W, output under 4 Ω
load
 Distortion rate (THD):
0.05% (VDD = 5.0 V, PO = 1 W)
 High efficiency up to 83% at 400 mW
 Filter-free Class-D architecture
 Needs only three external components
 Short circuit protection function
 Thermal shutdown function
 Under voltage lockout function
 Green package: DFN-8 and MSOP-8
Applications
 Wireless or cellular handsets and PDAs
 Personal navigation devices
 General portable audio devices
Descriptions
The DIO2140 is a 2.8 W high-efficiency filter-free
Class-D audio amplifier, which needs only three
external components. Its optimized PWM output
stage eliminates the LC output filter.
The DIO2140 features its filter-free Class-D
architecture, which leads to a reduction of
peripheral components amount, PCB board area,
and system cost. And high efficiency of up to
90% makes it suitable for cell phones and other
mobile device applications.
Moreover, the DIO2140 is also equipped with
protection functions, such as a short circuit
protection function for the speaker output
terminal, thermal shutdown function for inside of
the device, and under voltage lockout.