Monolithic Power Systems Inc. MPQ7795GRE-AEC1-P

Overview

MPQ7795GRE-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified mono Class-D audio amplifier delivering 24.5W into 4Ω at 14.4V PVDD, operating at selectable switching frequencies up to 2.2MHz, featuring integrated I²C diagnostics for open/short load detection and fault reporting in automotive infotainment systems.

For engineers reviewing the MPQ7795GRE-AEC1-P datasheet, MPQ7795GRE-AEC1-P pinout, MPQ7795GRE-AEC1-P application, or MPQ7795GRE-AEC1-P equivalent, this device supports critical automotive audio functions including E-call, telematics, cluster, and infotainment with low-EMI operation (CISPR 25 Class 5), adjustable power limiting, and thermal-safe operation up to +150°C junction temperature.

Technical Context

The MPQ7795 implements a bridge-tied load (BTL) output stage using low-R_DS(ON) (150mΩ) BCD MOSFETs and MeshConnect™ flip-chip packaging to minimize EMI and improve thermal performance. Its dual-mode switching architecture supports four fixed f_SW options (330/384/470/2200kHz), enabling optimization between efficiency (>90% at 470kHz/2.2MHz) and filter size.

Diagnostics are implemented via real-time monitoring of output impedance thresholds (R_OPEN = 95Ω, R_SHORT = 1.5Ω, R_STG = 250Ω, R_STB = 220Ω), reported over I²C alongside status flags for OCP, UVP, OTP, and PLIMIT events - all active during enabled operation without requiring MCU polling overhead.

Key Specifications

Pinout & Package

MPQ7795GRE-AEC1-P is housed in a wettable flank QFN-24 (4mm × 4mm) package with exposed thermal pad, optimized for automated optical inspection (AOI) and solder joint reliability 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 TAS5414QPWRQ1 and MAX9874AEUB+, MPQ7795GRE-AEC1-P uniquely combines AEC-Q100 Grade 1 operation, wettable flank QFN packaging, CISPR 25 Class 5 compliance, and full I²C-accessible diagnostics - making it the only option qualified for safety-critical, thermally demanding, and EMI-sensitive automotive mono audio nodes.

Availability

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

Supply support for MPQ7795GRE-AEC1-P 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 for automotive, industrial, and computing markets, with design centers in the US, China, and Taiwan.

The MPQ7795 belongs to MPS's automotive-grade Class-D audio amplifier product line, engineered specifically for low-EMI, high-efficiency mono audio delivery in safety-critical vehicle subsystems with integrated diagnostics and robust transient handling.

FAQ

What is the maximum continuous output power of MPQ7795GRE-AEC1-P into 4Ω?

The MPQ7795GRE-AEC1-P delivers 24.5W continuous output power into a 4Ω load at 14.4V PVDD with THD+N = 10% and f_SW = 2.2MHz. This rating is validated per the typical application circuit in the datasheet (Figure 13) and accounts for thermal derating at +150°C junction temperature.

Does MPQ7795GRE-AEC1-P support I²C write access to configure gain and switching frequency?

Yes - the device supports full I²C register access for configuring voltage gain (20/26/32/36dB), switching frequency (330/384/470/2200kHz), power limiter threshold, and diagnostic enable/disable states. All registers are documented in Section 8.5 of the MPQ7795 Rev. 1.0 datasheet.

How does the load diagnostic function operate during mute state?

Load diagnostics remain fully active when MUTE# is asserted (output switching disabled), as long as EN is high. The IC continuously monitors output impedance and reports faults via I²C status registers and FAULT# pin - enabling pre-activation speaker verification before unmute.

What is the purpose of the VDRV pin and its recommended bypass capacitor?

VDRV supplies gate drive and internal circuitry for the power limiter (PLIMIT) function. It must be bypassed to AGND with a 4.7µF to 10µF X5R/X7R ceramic capacitor placed adjacent to the pin - insufficient capacitance causes PLIMIT instability and erratic duty-cycle limiting under dynamic load conditions.

Can MPQ7795GRE-AEC1-P drive 2Ω speakers?

Yes - the datasheet explicitly states support for 2Ω to 16Ω speakers. At 2Ω, output power is limited by over-current protection (ILIM = 4–5A) and thermal constraints; maximum safe continuous output is ~18W at 14.4V PVDD with adequate PCB copper area and airflow.

Is the QFN-24 package lead-free and RoHS compliant?

Yes - MPQ7795GRE-AEC1-P uses lead-free, halogen-free packaging and complies with EU RoHS Directive 2011/65/EU. MPS confirms green status on its Quality Assurance webpage, and the wettable flank feature supports automated optical inspection for solder joint quality in automotive manufacturing.

What failure modes trigger the FAULT# pin assertion?

FAULT# asserts low for over-current (ILIM), PVDD under-voltage (UVP), junction over-temperature (OTP ≥170°C), power limiter violation, or any load diagnostic fault (open, short, short-to-rail). The pin remains latched low until cleared via I²C register write or cycling EN.