Monolithic Power Systems Inc. MPQ8039GN-AEC1-P

Overview

MPQ8039GN-AEC1-P from Monolithic Power Systems is an AEC-Q100 qualified high-current half-bridge power driver integrating 0.1Ω high-side and low-side 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 circuits.

For engineers reviewing the MPQ8039GN-AEC1-P datasheet, MPQ8039GN-AEC1-P pinout, MPQ8039GN-AEC1-P application, or MPQ8039GN-AEC1-P equivalent, key selection considerations include cycle-by-cycle current limiting, integrated UVLO and thermal shutdown, SOIC8E package with exposed pad, bootstrap gate drive architecture, and automotive-grade reliability per AEC-Q100 Grade 1 (−40°C to +125°C).

Technical Context

The MPQ8039GN-AEC1-P implements a self-contained half-bridge topology with internal N-channel MOSFETs, driven by a single PWM logic input that directly controls high-side turn-on (PWM high) and low-side turn-on (PWM low), incorporating 40ns dead-time generation and bootstrap capacitor charging during low-side conduction. It uses an internal 5V regulator to supply DRV and gate drive circuitry, eliminating external bias supplies.

Protection functions are hardware-based and fully integrated: cycle-by-cycle current limiting on both switches, input under-voltage lockout (UVLO rising at 7.5V), thermal shutdown at 160°C with 20°C hysteresis, and 2.5μA shutdown mode activated via SHDN pin. All protections operate independently of external controllers.

Key Specifications

Pinout & Package

MPQ8039GN-AEC1-P is housed in an SOIC8E (SOIC-8 with exposed thermal pad) package, measuring 5.0mm × 6.2mm × 1.75mm, with Pin 4 (GND) and the bottom-side exposed pad electrically and thermally connected to system ground for optimal thermal dissipation (θJA = 48°C/W, θJC = 10°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ8039GN-AEC1-P, the MPQ8039GN-Z omits automotive qualification but offers identical performance for industrial use, while MPQ8039GN-AEC1-Z provides identical functionality in tape-and-reel format-making it ideal for high-volume SMT manufacturing without design change.

Availability

MPQ8039GN-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera power supplies, HVAC motor control modules, and instrument cluster backlighting requiring stable component supply and long-term lifecycle support.

Supply support for MPQ8039GN-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, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ8039 belongs to MPS's AEC-Q100 qualified power driver product line, engineered specifically for automotive subsystems demanding high-current, high-frequency, and fault-tolerant half-bridge operation in harsh environments.

FAQ

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

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 and may trigger UVLO or thermal shutdown. For automotive 24V systems, this range accommodates nominal 24V, cold-crank (down to ~6V), and load-dump (up to ~40V) transients when used with appropriate front-end clamping.

How does the bootstrap capacitor function in the MPQ8039GN-AEC1-P?

The bootstrap capacitor (≥0.1μF) connects between BS and SW pins. When the low-side MOSFET conducts, SW is pulled to GND, allowing the internal charge pump to recharge the capacitor from the DRV rail. During high-side conduction, the capacitor supplies gate drive voltage above SP, enabling N-channel high-side switching without an isolated supply-critical for compact, efficient half-bridge designs.

Is MPQ8039GN-AEC1-P pin-compatible with other MPS half-bridge drivers?

No-MPQ8039GN-AEC1-P has a unique pin assignment optimized for its bootstrap architecture and protection features. For example, MPQ8019 uses different pinout and lacks AEC-Q100 qualification. Direct substitution requires schematic and layout revision. Always verify pin functions against the specific part's datasheet before replacement.

What thermal management practices are required for continuous 4.25A operation?

To sustain ±4.25A continuous current, the SOIC8E package requires a minimum 1-inch² copper pour connected to Pin 4 (GND) and the exposed thermal pad, with ≥2 thermal vias to inner ground planes. With θJA = 48°C/W, ambient temperature must remain ≤85°C to keep junction temperature below 125°C. Forced airflow or heatsink integration further improves margin.

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

No-it cannot maintain 100% high-side conduction due to bootstrap capacitor discharge. The maximum achievable high-side duty cycle is 99.5% at 3.3kHz (per datasheet), limited by the need to periodically refresh the BS capacitor during low-side conduction. For 100% duty applications, external high-side gate drive or alternative topologies (e.g., high-side driver + low-side switch) are required.

Can MPQ8039GN-AEC1-P drive inductive loads without external freewheeling diodes?

Yes-the integrated MOSFETs provide intrinsic body-diode conduction paths, and the device's current-limiting and thermal protection safely handle inductive kickback during PWM transitions. However, for high-efficiency or high-frequency operation, external Schottky diodes across the load may still be added to reduce conduction loss and improve EMI performance.

What is the purpose of the N/C pin (Pin 8)?

Pin 8 is a no-connect terminal-neither bonded nor functional inside the die. It must remain unconnected on the PCB; no trace, pad, or component should be attached. Routing or terminating this pin may cause mechanical stress or unintended coupling, violating the validated SOIC8E land pattern and risking reliability.