EVQ7795-R-00A
2.2MHz Low EMI 24.5W Mono BTL Class-D
Audio Amplifier, AEC-Q100 Evaluation Board
EVQ7795-R-00A Rev. 1.0 MonolithicPower.com 1
10/21/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2021 MPS. All Rights Reserved.
DESCRIPTION
The EVQ7795-R-00A is an evaluation board
designed to demonstrate the capabilities of the
MPQ7795-AEC1, an automotive-grade, low-
EMI, differential analog input, Class D audio
amplifier with I2C diagnostics. The MPQ7795
can drive a mono speaker in a bridge-tied load
(BTL) configuration.
The MPQ7795 employs a BTL structure to
deliver 24.5W of power to 4Ω speakers with a
14.4V power supply. MPS’s Class D audio
amplifiers exhibit the high fidelity of Class AB
amplifiers at high efficiency.
The selectable switching frequency (fSW) can be
set to 330kHz, 384kHz, 470kHz, or 2.2MHz,
and can achieve >90% efficiency at both
470kHz and 2.2MHz.
The MPQ7795 integrates the load diagnostic
function that detects open load, short load, load
short to GND, load short to PVDD. The
diagnostic runs when the device is enabled,
which helps to protect the load and the device.
Full protection features include over-current
protection (OCP), under-voltage protection,
thermal shutdown, and adjustable power
limiting.
The adjustable power limit (PLIMIT) function
sets the output peak-to-peak voltage limit
(VPP_LIMIT) by limiting the duty cycle to a fixed
maximum value. VPLIMIT can be considered the
virtual voltage rail. The power supply input
(PVDD) voltage (VPVDD) is greater than VPLIMIT.
The EVQ7795-R-00A is a fully assembled and
tested evaluation board. The MPQ7795 is a
fully integrated audio amplifier that reduces the
solution size, and is available in a QFN-24
(4mmx4mm) package.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Input voltage VEMI 5 to 36 V
FEATURES
5V to 36V Operating Input Voltage (VIN)
Range
±5A Peak Current Output
Differential Analog Input
42V Load Dump
Low 0.02uA Standby Current
Low 6.5mA Idle Current
330kHz, 384kHz, 470kHz, or 2.2MHz
Selectable Switching Frequency (fSW)
Delivers 24.5W into 4Ω Load with 14.4V
Power VDD (PVDD)
High Power Efficiency:
o Up to 92.6% Efficiency for 8Ω Load
o Up to 90.4% Efficiency for 4Ω Load
150mΩ power MOSFETs
Start-Up/Shutdown Pop-Noise Reduction
Selectable Voltage Gain
Adjustable Power Limiter
Open/Short Load Detection
Output Short to PVDD/Ground Detection
Over-Current Protection (OCP)
Under-Voltage Protection (UVP)
Thermal Shutdown
Status Reporting via the I2C Interface and
Fault Output Pin (FAULT#)
Low EMI Meets CISPR 25 Class 5
Specifications with Long Output Cable
Communicates with Microcontroller Unit
(MCU) via I2C Interface
Supports 2Ω to 16Ω Speakers
Available in a QFN-24 (4mmx4mm)
Package
Available in AEC-Q100 Grade 1
APPLICATIONS
Automotive Emergency Call (eCall)
Systems
Telematics Systems
Audio Infotainment Systems
Automotive Clusters
ll MPS parts are lead-free, halogen-free, and adhere to the RoHS
directive. For MPS green status, please visit the MPS website unde
Quality Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are
trademarks of Monolithic Power Systems, Inc. or its subsidiaries.
