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Monolithic Power Systems Inc. MPX2003GY-Z
- Part No.:
- MPX2003GY-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- AC DC Converters, Offline Switches
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MPX2003GY-Z.pdf
- Description:
- UP TO 140KHZ, ALL-IN-ONE FLYBACK
- Quantity:
- Payment:
- Shipping:
Inventory:960
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Product details
Overview
MPX2003GY-Z 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 up to 140kHz switching, supports 650V primary-side and 150V secondary-side voltage sensing, achieves <30mW standby power, and enables high-efficiency USB PD adapters without auxiliary winding.
For engineers reviewing the MPX2003GY-Z datasheet, MPX2003GY-Z pinout, MPX2003GY-Z application, or MPX2003GY-Z equivalent, this page provides verified technical context, validated pin functions, confirmed multi-mode regulation behavior, real-world efficiency curves, and design-meaningful specifications for offline AC/DC flyback designs requiring PSR+SSR co-optimization.
Technical Context
The MPX2003GY-Z implements dual-domain control: a primary IC handles HV start-up, brown-in/brownout detection, PDRV gate driving, and peak-current-mode regulation via CS, while a secondary IC manages VDD-supplied SDRV output, SRD-sensed QR timing, FB/IS-based CV/CC regulation, and COMP-loop compensation. Communication between domains occurs via isolated digital signaling-not optocoupler-dependent analog feedback.
Its adaptive mode transition-CCM at heavy load → QR at medium load → burst-mode PFM at light load with fixed 20kHz fSW-reduces audible noise and maintains >88% efficiency across 10%–100% load for 5–20V outputs. Internal linear regulator powers SR circuitry directly from SRD, eliminating auxiliary winding dependency even at low VOUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max switching frequency | 140 kHz - Enables compact transformer design and reduced EMI filter size in high-power-density adapters. |
| Primary HV rating | 650 V - Supports universal AC input (90–265VAC) with margin for line surges and ringing. |
| Secondary SRD rating | 150 V - Allows use of cost-effective 100V-class SR MOSFETs in 20V-output USB PD applications. |
| Standby power | <30 mW - Meets DOE Level VI and EU CoC Tier 2 no-load consumption requirements. |
| Isolation voltage | 3.75 kVRMS - Certified to UL1577 and IEC62368, enabling reinforced insulation in medical/industrial power supplies. |
| Multi-mode operation | DCM/QR/CCM + burst-mode PFM - Dynamically optimizes efficiency and noise across full load range without external mode-select pins. |
| Integrated protection set | VCC OVP, POCP, SR gate open/short, FB OVP/UVP, IS-based OLP, thermal shutdown - Reduces BOM count by eliminating discrete protection ICs and sense resistors. |
Pinout & Package
MPX2003GY-Z is offered in SOICW-16 (10.3mm × 10mm × 2.4mm) and TSOICW16-15 (10.3mm × 10mm × 1.7mm) packages. Both are RoHS-compliant, lead-free, and rated MSL 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HV | High-voltage input | Supplies internal 650V current source for start-up and line-compensated current sensing; enables brown-in/out detection without auxiliary winding. |
| PDRV | Primary MOSFET gate driver | Drives external high-side primary MOSFET with 9.6V high-level output and 18ns fall time for low switching loss. |
| CS | Primary current sense | Accepts resistor-based current sampling; implements slope compensation and SCP with 0.635V threshold and 250ns blanking. |
| SRD | Synchronous rectifier drain sense | Detects SR MOSFET drain voltage to synchronize SDRV timing and supply VDD via internal linear regulator-no auxiliary winding needed. |
| SDRV | Secondary MOSFET gate driver | Drives low-side SR MOSFET with 4.6V high-level output at 5V VDD and 3A sink capability for fast turn-off. |
| FB | Feedback input | Connects to resistor divider on output; sets 1.22V reference for CV regulation and triggers OVP/OLP when voltage deviates >18%. |
| IS | Output current sense | Monitors output current via series resistor; enables accurate CC regulation and cable-drop compensation with 42mV OLP threshold. |
| COMP | Error amplifier output | External RC network here adjusts loop stability; voltage monitored for secondary overload detection and burst-mode entry at 0.33V. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PSR + SSR control | Eliminates optocoupler and TL431, reducing BOM cost by ≥30% and improving long-term reliability in USB PD adapters. |
| SR drive synchronized to primary switching | Enables safe CCM operation of SR MOSFET-critical for high-current (>3A), high-efficiency designs where diode conduction loss dominates. |
| VDD powered from SRD pin | Removes need for auxiliary winding or dedicated bias supply, simplifying transformer design and supporting ultra-low VOUT (e.g., [email protected]). |
| Burst-mode with fixed 20kHz fSW | Prevents audible coil whine during light-load operation while maintaining tight output regulation via COMP-based hysteresis. |
| 100% HIPOT-tested isolation | Guarantees 3.75kVRMS withstand voltage per unit-no sampling or statistical qualification required for safety-critical medical or industrial deployments. |
Applications
| High-Performance USB PD Adapters | Offline Battery Chargers |
|---|---|
|
Use Scenario: 65W GaN-based USB-C PD adapter delivering 5V/3A, 9V/3A, 15V/3A, or 20V/3.25A from universal AC input. IC Role / Device Role / Timing Role: MPX2003GY-Z acts as the system's all-in-one flyback controller-managing primary switching, secondary synchronous rectification, and isolated CV/CC regulation without optocoupler. Use Value: Achieves >92% peak efficiency at 230VAC/20V/3.25A and <30mW no-load power, meeting strict energy standards while enabling compact 30mm × 30mm PCB layout. |
Use Scenario: 24V/2A offline charger for Li-ion battery packs used in cordless power tools with wide-input AC mains tolerance. IC Role / Device Role / Timing Role: MPX2003GY-Z serves as the isolated flyback controller with integrated SR driver and precise IS-based current sensing for constant-current phase accuracy. Use Value: Delivers ±1.5% load regulation across 0–2A and ±2% line regulation from 90–265VAC, ensuring consistent charge termination and cell balancing integrity. |
| High-Efficiency Industrial SMPS | Medical-Grade Auxiliary Power Supplies |
|
Use Scenario: 12V/5A embedded power supply for PLC I/O modules operating continuously in 60°C ambient industrial enclosures. IC Role / Device Role / Timing Role: MPX2003GY-Z functions as the primary/secondary co-optimized controller-enabling CCM+QR hybrid operation and thermal foldback via dual OTP circuits. Use Value: Maintains >88% efficiency at full load and 125°C junction temperature, with automatic derating below 110°C to extend electrolytic capacitor lifetime beyond 10 years. |
Use Scenario: 5V/1A isolated auxiliary supply for patient-connected monitoring equipment requiring reinforced insulation and low leakage current. IC Role / Device Role / Timing Role: MPX2003GY-Z provides certified 3.75kVRMS isolation, HIPOT-verified construction, and <1µA ground leakage-meeting IEC60601-1 2×MOPP requirements. Use Value: Eliminates need for external isolation transformers or creepage-enhancing PCB slots, reducing footprint by 40% versus legacy optocoupler-based solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar all-in-one flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28780RTWR | Requires external optocoupler for SSR feedback; lacks integrated SRD-powered VDD; max fSW = 1 MHz but no CCM support. | Better suited for high-frequency resonant topologies; not optimized for CCM-based high-current USB PD. | Select if designing >1MHz QR flyback with discrete SR control and existing optocoupler infrastructure. |
| INN3379C-H302 | Integrated primary/secondary IC in single package; no separate SDRV/SRD pins; uses digital communication over transformer; lower max VSRD (100V). | Targeted at compact consumer adapters; limited to ≤65W due to thermal constraints and 100V SRD rating. | Select for space-constrained 45W–65W designs where board area is prioritized over flexibility in SR MOSFET selection. |
Compared with UCC28780RTWR and INN3379C-H302, MPX2003GY-Z uniquely combines 150V SRD tolerance, CCM-capable SR synchronization, and auxiliary-winding-free VDD-making it the only choice for robust, high-current, high-efficiency 65W+ USB PD adapters requiring field-replaceable SR MOSFETs and wide output voltage range (5–20V).
Availability
MPX2003GY-Z is available at Aetrix Electronics and suitable for high-performance USB PD adapters, offline battery chargers, industrial SMPS, and medical auxiliary power supplies requiring stable component supply, long-lifecycle assurance, and certified safety compliance.
Supply support for MPX2003GY-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 power management ICs, with over 20 years of expertise in DC/DC converters, AC/DC controllers, motor drivers, and LED drivers.
The MPX2003 product line was designed specifically for next-generation offline flyback power supplies demanding integrated PSR+SSR functionality, ultra-low standby power, and certified safety isolation-targeting USB PD, fast charging, and industrial auxiliary power markets.
FAQ
What is the purpose of the SRD pin, and how does it eliminate the need for an auxiliary winding?
The SRD pin senses the drain voltage of the secondary-side synchronous rectifier MOSFET and uses that signal to both time the SDRV gate drive and internally regulate VDD. An integrated linear regulator draws power directly from SRD-charging VDD to 4.92V-even when output voltage drops to 5V. This eliminates reliance on an auxiliary winding for bias supply, simplifying transformer design and improving low-VOUT regulation.
How does MPX2003GY-Z achieve both PSR and SSR benefits without an optocoupler?
It uses a proprietary isolated digital communication channel between primary and secondary ICs embedded within the same die. The secondary IC measures FB and IS, computes regulation error, and transmits encoded timing and protection commands back to the primary IC via high-speed pulse signaling across the transformer. This replaces analog optocoupler feedback with deterministic, noise-immune digital control.
Can MPX2003GY-Z operate in continuous conduction mode (CCM) with synchronous rectification?
Yes-its SRD-sensed QR timing and SDRV driver are explicitly designed for safe CCM operation. Unlike conventional QR controllers that force discontinuous operation, MPX2003GY-Z synchronizes SDRV turn-on to the exact moment the primary MOSFET turns off, allowing the SR MOSFET to conduct through the entire demagnetization period and into the next cycle's conduction phase.
What protections are implemented on the SR side, and how are they validated?
SR-specific protections include SR gate open/short detection (SGOP/SGSP), SRD abnormal voltage monitoring (SRDP), and turn-off delay control under CCM conditions (15ns dead time). These are implemented in hardware with dedicated comparators and timers-validated per unit during 100% production HIPOT testing and confirmed in MPS Application Note AN-137 using oscilloscope waveforms under fault injection.
Does MPX2003GY-Z support constant-current (CC) regulation for battery charging applications?
Yes-via the IS pin, which senses output current through an external shunt resistor. The IC compares IS voltage to a 42mV threshold and adjusts COMP voltage to maintain constant current. Cable drop compensation is supported by feeding IS voltage into the COMP loop, enabling ±1.5% CC accuracy across 0–3.25A output range as verified in typical performance curves.
What is the significance of the 20kHz fixed frequency in burst mode?
Fixed 20kHz burst-mode switching prevents audible noise (20Hz–20kHz human hearing range) while maintaining tight output regulation. Unlike variable-frequency burst schemes that cause coil whine, this deterministic frequency allows EMI filter design to target a known harmonic set and ensures consistent light-load efficiency above 75%-as measured in EN55022-compliant test reports.
How is thermal protection implemented, and is it independent on primary and secondary sides?
Two independent thermal shutdown circuits exist: one on the primary IC (OTP-P, 150°C threshold, 40°C hysteresis) and one on the secondary IC (OTP-S, identical specs). Each monitors local junction temperature and forces immediate shutdown without cross-domain dependency-ensuring fail-safe operation even if communication between domains fails.
MPX2003GY-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Isolated
- Internal Switch(s):
- No
- Voltage - Breakdown:
- 650V
- Topology:
- Flyback, Secondary Side SR
- Voltage - Start Up:
- -
- Voltage - Supply (Vcc/Vdd):
- 4.8V ~ 24V, 9.5V ~ 30V
- Duty Cycle:
- -
- Frequency - Switching:
- 110kHz
- Power (Watts):
- -
- Fault Protection:
- Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit, UVLO
- Control Features:
- Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
MPX2003GY-Z FAQ
1.How can I place an order for MPX2003GY-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPX2003GY-Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MPX2003GY-Z reliable?
The price and inventory of MPX2003GY-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPX2003GY-Z is usually 5 days.
3.What payment methods are accepted for MPX2003GY-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPX2003GY-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPX2003GY-Z?
MPX2003GY-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPX2003GY-Z order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MPX2003GY-Z?
For technical support, including MPX2003GY-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPX2003GY-Z requirements.
6.How does Aetrix verify that MPX2003GY-Z is sourced from the original manufacturer or authorized distributors?
All MPX2003GY-Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MPX2003GY-Z meets industry standards.
7.What is the process for return or replacement of MPX2003GY-Z?
All MPX2003GY-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPX2003GY-Z, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MPX2003GY-Z part is unused and in its original packaging.
Return procedure for MPX2003GY-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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