Monolithic Power Systems Inc. MPX2002GY-P

Overview

MPX2002GY-P from Monolithic Power Systems is an all-in-one flyback controller integrating primary-side regulation (PSR), secondary-side synchronous rectification (SR) control, safety-compliant feedback, and multi-mode operation (DCM/QR/CCM). It delivers <30mW standby power, supports 650V primary-side and 150V secondary-side voltage ratings, and enables high-efficiency USB PD adapters and offline battery chargers without auxiliary winding.

For engineers reviewing the MPX2002GY-P datasheet, MPX2002GY-P pinout, MPX2002GY-P application, or MPX2002GY-P equivalent, key selection criteria include its integrated SR driver with <24mV turn-on threshold, CCM-safe operation via matched primary/secondary timing, 3.75kVRMS isolation, UL1577/IEC62368 safety certification, and burst-mode 20kHz fixed-frequency operation to suppress audible noise.

Technical Context

The MPX2002GY-P implements dual-domain regulation: primary-side HV pin monitors input for brown-in/brownout (107V/98V thresholds) and supplies start-up current, while secondary-side FB and IS pins enable precise CV/CC regulation with 1.22V reference and 42mV OLP threshold. Its functional block integrates PSR-based VCC monitoring and SSR-based COMP loop control with cross-isolation communication.

It dynamically selects operating mode based on load: CCM at heavy loads, QR at medium loads (fSW up to 85kHz), and PFM in burst mode (fPFM-MIN = 20kHz) with fixed 20kHz switching during burst to eliminate acoustic noise. Protection logic includes independent OTP (150°C), SR gate open/short detection, and external-triggered protection via PEP pin with 0.5V threshold.

Key Specifications

Pinout & Package

MPX2002GY-P is packaged in SOICW-16 (10.3mm × 10mm × 2.4mm), a wide-body surface-mount package rated for high-voltage isolation and thermal performance (θJA = 44°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar all-in-one flyback controller applications.

Compared with MPX2004GY-P, MPX2002GY-P trades minor EMI optimization for lower unit cost and proven field reliability; versus UCC28780RTWR, it eliminates external SR driver dependency and reduces component count by three, accelerating time-to-market for USB PD and battery charger designs.

Availability

MPX2002GY-P is available at Aetrix Electronics and suitable for high-performance USB PD adapters, offline battery chargers, and high-efficiency industrial power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for MPX2002GY-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 20 years of expertise in DC/DC converters, AC/DC controllers, and motor drivers.

The MPX2002 belongs to MPS's all-in-one AC/DC flyback controller product line, designed specifically to reduce system complexity and BOM cost in compact, high-efficiency offline power supplies for consumer, industrial, and medical applications.

FAQ

What is the maximum output power supported by MPX2002GY-P?

The MPX2002GY-P supports up to 65W output power in typical USB PD adapter designs using 650V primary MOSFETs and optimized transformer design. Its 2.8W SOICW-16 thermal rating and integrated SR driver enable sustained operation at full load with proper PCB copper area and airflow, as verified in MPS reference design MP020-65W.

Does MPX2002GY-P require an auxiliary winding for VDD supply?

No. MPX2002GY-P powers its secondary-side VDD rail directly from the SRD pin, eliminating the need for an auxiliary winding. This reduces transformer complexity, lowers BOM count by one winding and associated rectifier/filter components, and improves design flexibility for low-output-voltage applications like 5V USB PD.

How does MPX2002GY-P achieve CCM-safe synchronous rectification?

MPX2002GY-P achieves CCM-safe SR operation by tightly matching the SDRV gate drive timing to the primary MOSFET's PDRV signal through internal cross-isolation communication. Its SRD pin detects MOSFET drain voltage with −37mV turn-on threshold and 18mV turn-off threshold, ensuring zero-voltage switching even during continuous conduction, preventing shoot-through and improving efficiency by 1.5–2.2%.

What safety certifications does MPX2002GY-P hold?

MPX2002GY-P is UL1577 and IEC62368 certified for reinforced insulation, with 3.75kVRMS isolation voltage validated by 100% production HIPOT testing. DIN VDE V 0884-17 certification is in progress. These approvals cover creepage/clearance, partial discharge, and dielectric strength requirements for end-equipment safety compliance.

Can MPX2002GY-P operate with both primary-side and secondary-side regulation simultaneously?

Yes. MPX2002GY-P uniquely combines primary-side regulation (PSR) for fast transient response and line regulation with secondary-side regulation (SSR) for precise CV/CC accuracy. The PSR path monitors VCC for input line changes, while the SSR path uses FB and IS for output voltage/current feedback, enabling ±1% regulation across line, load, and temperature without optical coupler or TL431.

What is the purpose of the PEP pin on MPX2002GY-P?

The PEP (Primary External Protection) pin provides a dedicated interface for external fault signals such as primary MOSFET over-temperature or auxiliary winding over-voltage. With a 0.5V trigger threshold and 300µs delay, it allows designers to add custom protection without modifying the core control loop, enhancing system safety beyond the IC's built-in protections.

How does MPX2002GY-P minimize audible noise in light-load conditions?

MPX2002GY-P minimizes audible noise by entering burst mode with a fixed 20kHz switching frequency-unlike variable-frequency PFM controllers that generate tones in the 2–20kHz human hearing range. This fixed-frequency burst eliminates coil whine while maintaining <30mW standby power, satisfying global energy efficiency standards.