Monolithic Power Systems Inc. MPQ8039GN-AEC1-Z

Overview

MPQ8039GN-AEC1-Z from Monolithic Power Systems is an AEC-Q100 qualified high-current half-bridge power driver integrating matched 0.1Ω N-channel MOSFETs, delivering ±9A peak and ±4.25A continuous output current with up to 1.2MHz switching frequency, 7.5V–25V input range, and true 2-quadrant sourcing/sinking capability-used in Class D audio amplifiers and motor control stages.

For engineers reviewing the MPQ8039GN-AEC1-Z datasheet, MPQ8039GN-AEC1-Z pinout, MPQ8039GN-AEC1-Z application, or MPQ8039GN-AEC1-Z equivalent, key selection criteria include cycle-by-cycle current limiting, integrated UVLO/thermal shutdown, SOIC8E package thermal resistance (θJA = 48°C/W), and AEC-Q100 Grade 1 qualification for automotive environments.

Technical Context

The MPQ8039GN-AEC1-Z implements a self-timed bootstrap gate drive architecture where BS supplies high-side gate voltage via an external capacitor charged during low-side conduction. It features fixed dead time (~40ns) and internal 5V regulator powering DRV for logic and gate drive circuitry.

Current protection operates independently on both high- and low-side switches with ±9A cycle-by-cycle limit; thermal shutdown activates at TJ = 160°C with 20°C hysteresis. Input logic thresholds are VPWM rising = 2.4V and falling = 1.3V, compatible with standard 3.3V/5V microcontrollers.

Key Specifications

Pinout & Package

MPQ8039GN-AEC1-Z uses the SOIC8E (exposed pad) package with 8 pins and thermal pad connected to GND (Pin 4). The exposed pad improves θJC to 10°C/W and must be soldered to PCB ground plane for reliable thermal performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge driver applications.

Compared with MPQ8039GN-AEC1-Z, the MPQ8039GN-Z offers identical performance at lower cost but no automotive qualification, while TBD7200A requires additional external components and delivers less output power-making MPQ8039GN-AEC1-Z optimal for new AEC-Q100-compliant designs requiring integrated protection and high current density.

Availability

MPQ8039GN-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera power supplies, and brushed DC motor control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MPQ8039GN-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 over two decades of innovation in DC-DC conversion, motor control, and automotive power solutions.

The MPQ8039 belongs to MPS's AEC-Q100 qualified power driver product line, engineered specifically for automotive subsystems demanding high current density, integrated protection, and robust thermal performance in compact SOIC8E packaging.

FAQ

What is the maximum allowable input voltage for MPQ8039GN-AEC1-Z?

The absolute maximum SP supply voltage is +28V, but the recommended operating range is 7.5V to 25V. Operation above 25V risks exceeding safe junction temperature under load due to increased conduction loss and reduced thermal margin in the SOIC8E package.

How does the bootstrap capacitor (BS–SW) function during high-side conduction?

The BS capacitor is charged to ~5.6V via the internal DRV regulator when the low-side switch is on. During high-side conduction, it floats with SW, providing gate drive voltage >VSP to turn on the high-side N-MOSFET-enabling operation without a floating supply or isolated bias winding.

Is MPQ8039GN-AEC1-Z pin-compatible with non-AEC versions like MPQ8039GN-Z?

Yes-MPQ8039GN-AEC1-Z and MPQ8039GN-Z share identical pinout, package (SOIC8E), electrical specifications, and thermal characteristics. The only difference is AEC-Q100 Grade 1 qualification testing and associated traceability documentation.

What is the purpose of the N/C pin (Pin 8) and how should it be handled on the PCB?

Pin 8 is a no-connect terminal with no internal bond wire. It must remain unconnected on the PCB-no trace, pad, or solder mask opening should be assigned to it. Leaving it floating avoids unintended coupling or parasitic capacitance in high-speed switching paths.

Does MPQ8039GN-AEC1-Z support 100% duty cycle operation?

No-it supports up to 99.5% maximum duty cycle due to mandatory bootstrap capacitor refresh requirement. At 100% duty cycle, the low-side switch never turns on, preventing BS capacitor recharge and causing high-side gate drive collapse after ~300μs.

How is thermal performance affected by the exposed pad connection?

The exposed pad must be soldered to a dedicated GND copper pour with ≥4 thermal vias (0.3mm diameter) to inner/ground layers. Without proper connection, θJA degrades from 48°C/W to >75°C/W, risking thermal shutdown at ≤2.5A continuous load.

Can MPQ8039GN-AEC1-Z drive inductive loads without external flyback diodes?

Yes-the integrated MOSFETs include body diodes that provide freewheeling path during off-time. However, for high-efficiency or high-frequency operation, external Schottky diodes across SW–GND may be added to reduce conduction loss and improve EMI behavior.