ꢁ×ꢂꢆ W, ꢀꢅ to ꢁꢅ V, Ultra‑Low Idle Power, MERUS™ Multilevel Switching
Class‑D Audio Amplifier with Integrated DSP and Inductor‑Less Operation
MAꢁꢂꢅꢃDNS
ꢀ FEATURES
ꢂ DESCRIPTION
MERUS™ multilevel switching technology
The MAꢁꢄꢉꢈDNS is a ꢁ×ꢄꢆ W audio amplifier with inte‑
grated audio DSP and IꢁS/TDM audio interface. It features
the MERUS™ multilevel switching amplifier technology en‑
abling unmatched power eꢅiciency at both low and high
output power. Multilevel switching also relaxes EMI and
enables inductor‑less applications with lower cost and no
compromise in audio performance or eꢅiciency. A high or‑
derinternalfeedbackloopensureslowTHDforexcellentau‑
dio performance. The integrated DSP oꢅers a configurable
processing flow and can be used to correct and tune real
speaker applications with e.g. equalization, limiting and
more. The ultra‑low idle power consumption is at least five
times lower than the traditional class D audio amplifiers in
the market, making MAꢁꢄꢉꢈDNS ideal for battery powered
speaker applications with extended battery life and/or re‑
ducedbattery cellcost. In mains‑poweredmultichannel ap‑
plications, the reduced and scalable EMI performance, en‑
ables otherwise impossible industrial designs, without the
necessity for a heatsink or a traditional LC filter.
• ꢀ‑level voltage modulation for ultra‑low idle power con‑
sumption: ꢀꢁ mW @ ꢂꢃ PVDD (LPC mode) without the
need of complex dynamic rail‑tracking systems
• Inductor‑less application for reduced system cost without
output power limitations
• Reduced EMI emissions compared to traditional ꢁ and ꢄ
level class D audio amplifiers for fast time to market with‑
out compromises in audio performance or eꢅiciency
• High eꢅiciency at low output power: ꢆꢇ %, ꢁ×ꢂ W, ꢃ Ω
for extended battery life and easy thermal management
in multichannel products even in idle state
Flexible configuration and application
• BTL rated output: ꢁ×ꢄꢆ W, ꢂꢃ V, ꢈ Ω, ꢂꢉ% THD
• PBTL rated output: ꢂ×ꢆꢈ W, ꢂꢃ V, ꢁ Ω, ꢂꢉ% THD
• PVDD voltage range: ꢂꢉ V to ꢁꢉ V
• High eꢅiciency at low output power: ꢆꢇ %, ꢁ×ꢂ W, ꢃ Ω
ꢃ PRODUCT VALIDATION
• Selectable power mode profiles: Low Power Consump‑
tion (LPC) or High Audio Performance (HAP)
Qualification standard: Standard
• Short circuit protection: ꢊ A peak (BTL) / ꢂꢁ A peak (PBTL)
• External closed‑loop feedback for improved THD
ꢄ TYPICAL APPLICATION
1.8/3.3V
• Integrated DSP with configurable biquads, limiters, vol‑
ume control and more
EMC ferrite
filter
PVDD
VDD
FB0A
OUT0A
VDDIO
MSEL
PVDD
• Easy configuration over IꢁC‑bus with up to ꢊꢈ device ad‑
dresses
Audio so urce
I2S/TDM data
CH1
I2S_DI
I2S_SCK
I2S_WS
• ꢃ‑bit auxiliary ADC for internal temp. / PVDD monitoring
or sampling from external sources
FB0B
OUT0B
FB1A
Audio sink
I2S_DO
• Configurable switching edge steepness and inter‑chip
PWM sync for multi‑device systems.
I2S/TDM data
I2C_SCL
I2C_SDA
NMUTE
ENABLE
NERR
OUT1A
CH2
• No external heatsink required
HOST/MCU
Audio performance
NCLIP
• Output noise: ꢀꢁ μVrms (A‑weighted, HAP mode)
• Dynamic range: ꢂꢉꢊ dB (A‑weighted, HAP mode)
• THD+N: ꢉ.ꢉꢀ%, ꢀ W, ꢂ kHz
FB1B
I2C_AD1 OUT1B
I2C_AD0
Set address: 0x20
Efficiency VS output power
100
90
80
70
60
50
40
30
20
10
Audio I/O
• ꢄ‑wire digital audio interface (no MCLK required)
• ꢄꢁ, ꢈꢈ.ꢂ, ꢈꢃ, ꢃꢃ.ꢁ, ꢇꢊ, ꢂꢆꢊ.ꢈ, ꢂꢇꢁ kHz sample rates
• IꢁS and TDM formats supported
• Low input‑to‑output latency for echo cancellation
• Post‑DSP IꢁS output for chaining / echo cancellation
ꢁ TARGET APPLICATIONS
PVDD=18V
Load=8 +22µH
• Battery powered speakers
MERUS multilevel
Traditional class D
• Bluetooth/wireless/smart speakers and soundbars
• Conference speakers
0.1
1
4
10
20
• Multichannel/multi‑room audio systems
Output power [W]
Datasheet
www.infineon.com
Please read the Important Notice and Warnings at the end of this document
page ꢂ of ꢈꢁ
INTVꢁ.ꢂ.ꢇ
August, ꢁꢉꢁꢁ
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