Monolithic Power Systems Inc. MPQ8039GN-P

Overview

MPQ8039GN-P 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, wide 7.5V–25V input range, and true 2-quadrant sourcing/sinking capability for automotive-grade motor and audio amplification.

For engineers reviewing the MPQ8039GN-P datasheet, MPQ8039GN-P pinout, MPQ8039GN-P application, or MPQ8039GN-P equivalent, key selection criteria include cycle-by-cycle current limiting, integrated UVLO (7.5V rising), thermal shutdown (160°C), 2.5μA shutdown current, and SOIC8E package compatibility with exposed thermal pad for high-power density designs.

Technical Context

The MPQ8039GN-P implements a self-contained half-bridge gate driver with internal bootstrap charging circuitry-BS pin supplies high-side gate drive via external SW–BS capacitor, enabling operation without isolated supply. Dead time (~40ns) prevents shoot-through, and PWM-controlled logic interface directly drives high/low-side switches with 2.4V/1.3V hysteresis thresholds.

It features dual-cycle current limiting on both sourcing and sinking paths, independent of external sense resistors, and integrates a 5.1–6.0V regulated DRV rail derived from SP for internal logic and gate drive. Thermal protection includes 20°C hysteresis, and under-voltage lockout disables operation below 5.5V SP.

Key Specifications

Pinout & Package

MPQ8039GN-P uses the SOIC8E (SOIC8N with exposed thermal pad) package-8-pin surface-mount with Pin 4 (GND) and the underside thermal pad electrically tied to GND for enhanced thermal performance (θ_JA = 48°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ8039GN-P, MPQ8039GN-AEC1 extends junction temperature range to +150°C for under-hood use, while MP8039GN removes automotive qualification but retains identical performance-making it ideal for industrial BOM cost optimization without functional compromise.

Availability

MPQ8039GN-P is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera power supplies, HVAC actuator drivers, and industrial motor controllers requiring stable component supply across long production lifecycles.

Supply support for MPQ8039GN-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 automotive-qualified power driver product line, engineered specifically for robust, high-current half-bridge control in safety-critical vehicle subsystems operating across extreme temperature and EMI environments.

FAQ

What is the purpose of the BS pin and how is it used?

The BS (Bootstrap) pin powers the high-side gate driver using a capacitor charged between SW and BS. During low-side conduction, the internal charge pump replenishes the BS capacitor, enabling high-side turn-on without an isolated supply. A minimum 0.1μF ceramic capacitor must be placed directly between BS and SW, with short PCB traces to minimize ringing and ensure reliable startup.

Does MPQ8039GN-P require external current-sense resistors for overcurrent protection?

No. The MPQ8039GN-P implements internal cycle-by-cycle current limiting on both sourcing and sinking paths, triggered at ±9A peak. This hardware-based protection requires no external sense resistor, feedback loop, or configuration-reducing BOM count and layout complexity while ensuring deterministic fault response within one switching cycle.

Can MPQ8039GN-P operate with a 5V logic input while powered from a 24V SP supply?

Yes. The PWM input is logic-compatible with 0–5V signals regardless of SP voltage (7.5–25V). Input thresholds are fixed at 2.4V (rising) and 1.3V (falling) with hysteresis, ensuring noise immunity. No level-shifting circuitry is needed, simplifying interface with microcontrollers and FPGA I/O banks.

How does thermal shutdown behave during sustained overload?

When junction temperature reaches 160°C, thermal shutdown activates and disables both MOSFETs. The device remains latched off until temperature falls by 20°C (to ≤140°C), at which point it automatically resumes normal operation-no external reset or power cycle is required, supporting robust fault recovery in thermally constrained enclosures.

Is the exposed pad on the SOIC8E package electrically connected?

Yes-the exposed thermal pad on the MPQ8039GN-P SOIC8E package is internally connected to Pin 4 (GND). It must be soldered to a dedicated PCB GND copper pour with multiple thermal vias to maximize heat dissipation. Leaving it floating or unconnected degrades θ_JA by >30% and risks thermal shutdown under moderate load.

What is the minimum recommended PWM pulse width for reliable switching?

The MPQ8039GN-P supports minimum high- or low-state PWM pulses of 200ns. This enables precise duty-cycle control at high frequencies (e.g., 1.2MHz), critical for fine-grained motor torque regulation and high-fidelity Class D audio modulation without dead-time distortion or missed transitions.

Does MPQ8039GN-P support 100% duty cycle operation?

No. Due to bootstrap architecture, the high-side switch cannot remain continuously on. Maximum achievable high-side duty cycle is 99.5% at 3.3kHz (with 100nF CSW), decreasing at higher frequencies. For 100% duty applications, an external high-side driver with floating supply or isolated gate driver is required.