Monolithic Power Systems Inc. MPQ7795GRE-AEC1-Z

Overview

MPQ7795GRE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, mono BTL Class-D audio amplifier delivering 24.5W into 4Ω at 14.4V PVDD with 2.2MHz switching frequency, integrated I²C diagnostics, and low-EMI MeshConnect™ flip-chip packaging. It serves as the primary audio power stage in automotive infotainment systems, supporting differential analog input, adjustable power limiting, and load fault detection (open/short-to-rail).

For engineers reviewing the MPQ7795GRE-AEC1-Z datasheet, MPQ7795GRE-AEC1-Z pinout, MPQ7795GRE-AEC1-Z application, or MPQ7795GRE-AEC1-Z equivalent, key selection criteria include its AEC-Q100 qualification, 24.5W BTL output capability, 2.2MHz/470kHz selectable fSW, integrated diagnostics reporting via I²C, and QFN-24 wettable flank package for automotive-grade solder joint inspection.

Technical Context

The MPQ7795 operates as a fully integrated mono BTL Class-D amplifier with configurable switching frequencies (330/384/470/2200 kHz), enabling EMI optimization across AM band avoidance and filter size reduction. Its diagnostic engine monitors load conditions-including open, short-to-GND, and short-to-PVDD-while enabled, and reports status via I²C or FAULT# pin.

It implements an adjustable power limiter (PLIMIT) that caps peak-to-peak output voltage by clamping duty cycle, acting as a virtual rail below PVDD. Protection includes OCP (5A), UVP (4.0V rising), OTP (170°C), and cold-crank operation down to 4.5V PVDD with load dump tolerance up to 42V.

Key Specifications

Pinout & Package

The MPQ7795GRE-AEC1-Z is housed in a wettable flank QFN-24 (4mm × 4mm) package rated MSL-1, optimized for automated optical inspection (AOI) of solder joints in automotive production.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar mono Class-D audio amplifier applications.

Compared with TAS5414CQDKRQ1 and MAX9877ETJ+T, the MPQ7795GRE-AEC1-Z uniquely combines AEC-Q100 Grade 1 qualification, integrated diagnostics, 24.5W output, and wettable flank packaging - making it the only option qualified for production automotive BTL audio where reliability, EMI, and functional safety coexist.

Availability

MPQ7795GRE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, instrument cluster audio alerts, and telematics E-Call modules requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.

Supply support for MPQ7795GRE-AEC1-Z 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 analog and power ICs, with core expertise in DC/DC conversion, motor drivers, and audio amplifiers for automotive and industrial markets.

The MPQ7795 belongs to MPS's automotive-grade Class-D amplifier product line, designed specifically to replace legacy AB amplifiers in infotainment and driver-assistance systems while meeting stringent EMI, thermal, and functional safety requirements.

FAQ

What is the maximum continuous output power of the MPQ7795GRE-AEC1-Z?

The MPQ7795GRE-AEC1-Z delivers 24.5W continuous output into a 4Ω load at 14.4V PVDD with THD+N = 10% and fSW = 2.2MHz. At 470kHz, it delivers 24.4W under identical conditions. Output power scales with PVDD and load impedance - e.g., 13.7W into 8Ω at 2.2MHz - and is limited by thermal dissipation and PLIMIT configuration.

Does the MPQ7795GRE-AEC1-Z require external bootstrap capacitors?

Yes. External 0.1µF ceramic capacitors must be placed between BSTA and SWA, and between BSTB and SWB, to supply gate drive current to the internal high-side MOSFETs. These capacitors must be located adjacent to the respective pins per layout guidelines to ensure reliable switching at 2.2MHz.

How does the adjustable power limiter (PLIMIT) function in practice?

The PLIMIT circuit limits the amplifier's peak-to-peak output voltage by constraining the PWM duty cycle, effectively creating a programmable virtual rail below PVDD. This prevents mechanical overexcursion of speakers during bass-heavy content or low-impedance transients, and is configured via I²C register writes - no external components required.

Can the MPQ7795GRE-AEC1-Z operate from a 5V supply?

No. The MPQ7795GRE-AEC1-Z requires a minimum PVDD of 4.5V but is optimized for automotive 12V/24V systems. At 5V, output power drops significantly (e.g., ~3W into 4Ω), and key protections like UVLO may trigger near threshold. It is not intended for 5V-only applications.

Is the FAULT# pin actively driven or open-drain?

The FAULT# pin is an open-drain output. It pulls low when any fault condition occurs (OCP, UVP, OTP, or diagnostic fault) and remains high-impedance otherwise. An external pull-up resistor (typically 4.7kΩ to AVDD or PVDD) is required for proper logic-level signaling to the host MCU.

What is the purpose of the VCP pin?

The VCP pin is the charge pump output used to generate the boosted voltage needed to fully enhance the internal high-side N-channel MOSFETs. A capacitor (typically 100nF X7R) must be connected from VCP to PVDD to complete the charge pump circuit and ensure robust gate drive under all load and supply conditions.

Does the MPQ7795GRE-AEC1-Z support I²C clock stretching?

No. The MPQ7795GRE-AEC1-Z does not support I²C clock stretching. It operates as a standard I²C slave with 400kHz maximum SCL frequency and fixed timing parameters (tHIGH ≥ 0.6µs, tLOW ≥ 1.3µs). Host controllers must adhere to these specifications without expecting stretch responses.