Datasheet Please read the Important Notice and Warnings at the end of this document V 1.0
www.infineon.com page 1 of 86 2018-07-17
MA12070
Filterless and High-Efficiency +4V to +26V
Audio Amplifier with Analog Input
Description
The MA12070 is a super-efficient audio power amplifier
based on proprietary multi-level switching technology.
It supports a 4-26V supply voltage range, allowing it to
be used in many different applications.
Multi-level switching enables very low power loss
during operation. In addition, it allows the amplifier to
be used in filterless configurations at full rated power
in a wide range of audio products.
The MA12070 features an embedded digital power
management scheme. The power management
algorithm dynamically adjusts switching frequency and
modulation to optimize power loss and EMI across the
output power range.
A 4
th
order feedback loop ensures low distortion and a
high PSRR.
The MA12070 operates from a single power stage
supply voltage (PVDD) and a +5V system supply voltage
(DVDD, AVDD).
Highly flexible output stage configurations are offered,
ranging from four single-ended outputs to a single
parallel-BTL output.
The MA12070 features protection against DC, short-
circuits, over-temperature and under-voltage
situations.
Flexible “Power Mode Profiles” allow the user to utilize
the multi-level switching technique for very low power
loss or very high audio performance.
Device configuration is controlled through an I2C
interface as well as dedicated control pins.
Applications
• Battery Operated Speakers
• Wireless and Docking Speakers
• Soundbars
• Multiroom Systems
• Home Theater Systems
Features
• Proprietary Multi-level Switching Technology
◦ 3-level and 5-level modulation
◦ Low EMI emission
◦ Filterless amplification
◦ Digital Power Management Algorithm
• High Power Efficiency (PMP4)
◦ <160mW Idle power dissipation (26V PVDD,
all channels switching)
◦ >80% Efficiency at 2W power (1kHz sine, 8Ω)
◦ >91% Efficiency at Full Power (1kHz sine, 8Ω)
• Audio Performance (PMP2)
◦ >110dB DNR (A-w, rel. to 1% THD+N power
level)
◦ 45µV output integrated noise (A-w)
◦ 0.004% THD+N at high output levels
• 4
th
Order Feedback Error Control
◦ High suppression of supply disturbance
◦ HD audio quality
• Supply Voltages: +4V to +26V (PVDD) and +5V
(A/DVDD)
• Selectable Gain (20dB/26dB)
• 2x30W continuous output power (RL = 8Ω at 22V,
PMP4, 10% THD+N level, without heatsink)
• 2×80W peak output power (26V PVDD, R
L
= 4Ω,
10% THD+N level)
• 2.0, 2.1, 4.0, 1.0 Output Stage Configurations
• Protection
◦ Under-voltage-lockout
◦ Over-temperature warning/error
◦ Short-circuit/overload protection
◦ Power stage pin-to-pin short-circuit
◦ Error-reporting through serial interface (I2C)
◦ DC protection
• I2C control (four selectable addresses)
• Heatsink free operation with EPAD-down package
Package
• 64-pin QFN Package with exposed thermal pad
(EPAD) and Lead-free Soldering