1 Features
• 2 × 3 W into 8-Ω, 1% THD+N, 7.4-V supply
• 2 × 10 W into 8-Ω, 1% THD+N, 13.5-V supply
• Fast Turn-on time < 15 ms
• Wide supply range 3.5-V to 14.4-V
–
• Low idle current and small footprint for portable
audio applications
– 4 x 4 mm2 QFN-24 package
– 20-mA (12-V) idle current with 1SPW
modulation
– > 90% Class-D efficiency
• Flexible audio solution:
– MUTE signal for fast enable and enable of
outputs
– Single-ended or differential analog inputs
– Selectable gain: 20 dB and 26 dB
• Integrated Protections and Auto Recovery:
– Pin-to-pin, pin-to-ground, and pin-to-power
short circuit protection
– Thermal protection, undervoltage protection,
and overvoltage protection
– Power limiter and DC speaker protection
• Spread-spectrum modulation reduces EMI
emission
• Reduced solution size and cost:
– EN55022 EMC compliant with ferrite bead
filters
– No external heatsink required

2 Applications
• Mobile, portable radios
• Notebooks
• Bluetooth® speakers and wireless speakers
• Smart home appliance
• TVs and monitors

3 Description
The TPA3139D2 is a 10-W stereo Class-D audio
amplifier, featuring a fast turn-on time of <15 ms and
mute function. It consumes low idle current of only 20-
mA (12-V) and can operate down to 3.5-V, allowing
for longer audio playback. Along with a small, 4 x 4
mm2 QFN package, the TPA3139D2 is optimized for
2-cell or 3-cell battery-powered systems with the
space constraints. In addition, the Spread Spectrum
Control enables the use of inexpensive ferrite bead
filters while meeting EMC requirements for system
cost reduction.
To further simplify the design, the TPA3139D2
integrates essential protection features including
undervoltage, overvoltage, power limit, short circuit,
overtemperature, as well as DC speaker protection.
All of these protections support automatic recovery.