Monolithic Power Systems Inc. EVQ7795-R-00A

Overview

EVQ7795-R-00A from Monolithic Power Systems is an AEC-Q100 qualified evaluation board for the MPQ7795-AEC1 mono BTL Class-D audio amplifier, delivering 24.5W into 4Ω at 14.4V PVDD with selectable 2.2MHz/470kHz switching frequency, integrated load diagnostics (open/short-to-GND/PVDD), and I²C-configurable gain, power limit, and fault reporting - designed for automotive infotainment and eCall systems.

For engineers reviewing the EVQ7795-R-00A datasheet, EVQ7795-R-00A pinout, EVQ7795-R-00A application, or EVQ7795-R-00A equivalent, this board enables rapid validation of low-EMI, high-efficiency audio amplification in AEC-Q100-compliant automotive designs with real-time diagnostics, thermal protection, and configurable switching frequency for EMI-sensitive layouts.

Technical Context

The EVQ7795-R-00A implements a fully assembled reference design for the MPQ7795GRE-AEC1 QFN-24 IC, featuring differential analog input, bridge-tied load (BTL) output stage, and integrated 150mΩ MOSFETs. It supports 5–36V PVDD operation and includes on-board EMI filtering (10nF input caps, 10µH/2.2µH output chokes), I²C interface (SDA/SCLK), and FAULT# assertion for system-level fault handling.

Board-level functionality includes MUTE-controlled startup sequencing, adjustable VPP_LIMIT via I²C power limiter, and hardware-enforced protection: over-current, under-voltage lockout, thermal shutdown, and open/short-load detection. The layout follows automotive-grade thermal and noise isolation practices, with dedicated AGND/PVDD planes and optimized SWA/SWB routing for 2.2MHz operation.

Key Specifications

Availability

EVQ7795-R-00A is available at Aetrix Electronics and suitable for automotive infotainment systems, telematics modules, emergency call (eCall) subsystems, and instrument cluster audio requiring stable component supply, AEC-Q100 qualification, and low-EMI Class-D validation.

Supply support for EVQ7795-R-00A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, including DC/DC converters, LED drivers, motor drivers, and Class-D audio amplifiers - all designed for automotive, industrial, and consumer applications.

The MPQ7795 product line delivers AEC-Q100 Grade 1 automotive audio amplifiers with integrated diagnostics, low-EMI operation, and flexible configuration via I²C - targeting space-constrained, safety-critical vehicle audio subsystems where reliability and electromagnetic compatibility are mandatory.

FAQ

What is the primary purpose of the EVQ7795-R-00A evaluation board?

The EVQ7795-R-00A is a fully assembled, tested reference platform for evaluating the MPQ7795GRE-AEC1 mono BTL Class-D amplifier. It enables engineers to validate performance metrics-including THD+N, efficiency, EMI behavior, and diagnostic response-under real-world automotive conditions using standard lab equipment and I²C configuration tools.

How do I configure the switching frequency to 2.2MHz on this board?

To set 2.2MHz operation: first pull the MUTE pin high, then power on the board; next, use I²C to write the 2.2MHz fSW setting; finally, pull MUTE low to enable normal operation. This sequence prevents unintended startup transients and ensures proper gate driver initialization at high frequency.

Does the board support both single-ended and differential audio inputs?

Yes - the board defaults to differential input (IN+ and IN−), but can be reconfigured for single-ended input by removing jumpers JP1. The schematic confirms direct connection paths for either topology, with matching input RC networks to maintain signal integrity and common-mode rejection.

What protection features are demonstrated on the EVQ7795-R-00A?

The board validates full MPQ7795 protection suite: over-current (SCP), under-voltage lockout (UVLO), thermal shutdown, adjustable power limiting (VPP_LIMIT), and comprehensive load diagnostics (open, short-to-GND, short-to-PVDD). Fault conditions trigger FAULT# assertion and are reportable via I²C status registers.

Can the EVQ7795-R-00A drive 2Ω speakers?

Yes - the underlying MPQ7795 supports 2Ω to 16Ω loads per datasheet specifications. The board's output filter (10µH/2.2µH chokes, 1µF ceramic caps) and PCB layout are validated for 4Ω and 8Ω, but 2Ω operation is electrically supported with appropriate external filtering and thermal derating per application requirements.

Is the board RoHS and AEC-Q100 compliant?

Yes - all components on the EVQ7795-R-00A meet RoHS and halogen-free requirements, and the target IC (MPQ7795GRE-AEC1) is certified AEC-Q100 Grade 1 (−40°C to +125°C ambient). Board-level compliance is confirmed through MPS's published quality documentation and material declarations.