Monolithic Power Systems Inc. MP8030GQJ-P

Overview

MP8030GQJ-P from Monolithic Power Systems is a fully integrated IEEE 802.3af/at/bt-compliant PoE powered device (PD) interface with an embedded high-efficiency flyback/forward DC/DC controller. It integrates a 100V hot-swap MOSFET (R_ON = 0.35 Ω), dual gate drivers (GATE1, GATE2), automatic maintain power signature (MPS), and supports PSR flyback, SSR flyback, and SSR active-clamp forward topologies - enabling single-chip PoE PD designs for up to 51W (internal FET) or >51W (external FET) in security cameras and WLAN access points.

For engineers reviewing the MP8030GQJ-P datasheet, MP8030GQJ-P pinout, MP8030GQJ-P application, or MP8030GQJ-P equivalent, this page delivers verified technical context, QFN-32 package mapping, IEEE 802.3bt compliance validation, primary-side regulation capability, and real-world design constraints including R_MPS pulse timing (75–95 ms), VDD UVLO (37–40 V), and GATE driver sink current (1.7 A).

Technical Context

The MP8030GQJ-P implements a dual-domain architecture: its PD interface handles full 802.3af/at/bt detection, classification (CLSA/CLSB), auto-class, and maintain power signature with programmable duty (DUTY pin) and priority control (PRI pin); simultaneously, its DC/DC controller supports three regulation modes - PSR flyback (COMP as EA output), SSR flyback (FB for OVP only), and SSR active-clamp forward (SYNC-driven synchronous rectification with Q_G-dependent OVP accuracy).

It features integrated protection including hiccup-mode overload protection (OLP), short-circuit protection (SCP), accurate over-voltage protection (OVP at 125% V_REF), thermal shutdown (150°C), and adaptive inrush current limiting (70–290 mA) with foldback triggered at 8.2–11.8 V V_DD–V_SRC. The controller operates at 250 kHz nominal switching frequency with frequency dithering and supports flexible topology selection via MODE pin configuration.

Key Specifications

Pinout & Package

MP8030GQJ-P is housed in a thermally enhanced QFN-32 (5 mm × 6 mm) package with exposed thermal pad, rated MSL Level 2 and optimized for PoE PD board space constraints and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PoE PD interface applications.

Compared with LT4275AIMSE#PBF and TPS23754PWPR, MP8030GQJ-P uniquely combines 802.3bt compliance, integrated active-clamp forward control, dual gate drivers for adapter/PSE coexistence, and programmable MPS duty - reducing BOM count by ≥4 components and enabling next-gen high-power PoE endpoints.

Availability

MP8030GQJ-P is available at Aetrix Electronics and suitable for security camera deployments, WLAN access point manufacturing, VoIP phone production, and industrial IoT gateway development requiring stable component supply across multi-year product lifecycles.

Supply support for MP8030GQJ-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 power management ICs, with over two decades of leadership in DC/DC converters, PoE solutions, and motor drivers.

The MP8030 product line targets IEEE 802.3bt-compliant powered devices requiring single-chip integration of PD interface and flexible DC/DC control - specifically engineered to reduce system cost and board area in high-density networking and surveillance equipment.

FAQ

What is the maximum power delivery supported by MP8030GQJ-P using only the internal hot-swap MOSFET?

The MP8030GQJ-P supports up to 51W using its integrated 100V/0.35Ω hot-swap MOSFET, validated under IEEE 802.3bt Type 3 (51W) conditions. At 57V input and 1A load, conduction loss is ~0.35W; thermal design must maintain junction temperature ≤125°C per datasheet derating curves.

How does the MP8030GQJ-P handle power source arbitration between PoE and an external adapter?

Power arbitration is controlled by the PRI pin: internally pulled high to 5V, it defaults to PSE priority; pulling PRI low selects adapter (VADP) priority. GATE2 drives the adapter-path N-FET, while GATE1 manages external PSE-path FETs, enabling seamless switchover without output disruption.

Can MP8030GQJ-P be used in active-clamp forward topology without isolated voltage sensing?

Yes - the MP8030GQJ-P implements accurate OVP (±5%) in active-clamp forward mode using FB pin sensing, provided the synchronous MOSFET's gate charge exceeds 17.5nC (N-channel) or 5nC (P-channel), as specified in the OVP Design section (page 37 of Rev. 1.1 datasheet).

What is the function of the R_MPS pin, and how is it configured for IEEE 802.3bt compliance?

R_MPS outputs a 24V pulse to maintain IEEE 802.3bt power signature during low-load or idle states. Duty cycle (6–37%) and timing (on/off periods) are set by DUTY pin voltage; a 1kΩ pull-down yields 37% duty for Type 1/2 PSE, while floating DUTY yields 17% for Type 3/4.

Does MP8030GQJ-P support primary-side regulation (PSR) without an optocoupler or TL431?

Yes - in PSR mode (MODE pin floating), the COMP pin serves as the error amplifier output, enabling direct regulation via transformer auxiliary winding feedback. No optocoupler or secondary-side reference is required, reducing component count and improving reliability in isolated flyback designs.

What thermal management guidance applies to the QFN-32 package in continuous 51W operation?

At 51W, the QFN-32 package requires ≥4 cm² of 2-oz copper on the thermal pad connected to internal ground planes. Thermal resistance θ_JA is 32°C/W on a 4-layer EVB; for production boards, add 2–4 thermal vias (0.3mm diameter, 0.8mm pitch) under the pad to achieve <25°C/W.

Is the MP8030GQJ-P RoHS-compliant and halogen-free?

Yes - MP8030GQJ-P is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU. Full material declarations and green status documentation are available on the Monolithic Power Systems website under Quality Assurance.