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Monolithic Power Systems Inc. MPX2001GY-Z
- Part No.:
- MPX2001GY-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- AC DC Converters, Offline Switches
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MPX2001GY-Z.pdf
- Description:
- IC OFFLINE SWITCH FLYBACK 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,351
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Product details
Overview
MPX2001GY-Z from Monolithic Power Systems is an all-in-one flyback controller IC integrating primary-side MOSFET drive, secondary-side regulation, and synchronous rectification (SR) driver with capacitive isolation. It delivers 4500Vrms isolation, supports both DCM and CCM SR operation, and enables PSR+SSR hybrid control without optocoupler or auxiliary winding feedback. It is used in USB PD 45W AC/DC adapters requiring high efficiency, compact layout, and robust protection.
For engineers reviewing the MPX2001GY-Z datasheet, MPX2001GY-Z pinout, MPX2001GY-Z application, or MPX2001GY-Z equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed application use cases, and two rigorously cross-checked alternative parts - all grounded in Monolithic Power's Rev. 1.1 datasheet and official evaluation kit documentation.
Technical Context
The MPX2001 implements a dual-domain architecture: primary-side circuitry (HV, PDrv, CS, EBO) handles high-voltage start-up, brown-in/out detection, peak-current mode control with slope compensation, and primary OCP/SCP; secondary-side circuitry (VDD, FB, COMP, IS, SRD, SDrv) performs precise CV/CC regulation, real secondary-sense OLP, and adaptive SR timing synchronized to primary switching via capacitive isolation channel.
Its capacitive isolation barrier enables direct transmission of sync signals between domains, allowing the SR driver (SDrv) to precisely match the primary MOSFET gate drive (PDrv) timing - enabling safe CCM operation and eliminating cross-conduction risk. Protection logic includes independent OTP (150°C), UVLO (VCC: 7–16V; VDD: 4.75–32V), and externally triggered fault handling via PEP pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 4500Vrms - UL1577 & IEC 62368 certified; enables reinforced insulation for Class II AC/DC systems without creepage/clearance redesign. |
| Primary HV Breakdown | 650V - integrates HV current source for direct line-start; eliminates external HV startup resistor in <24W designs. |
| SR Operating Modes | DCM & CCM support - allows full-load efficiency optimization across universal input (90–264VAC) and wide output load ranges. |
| Feedback Architecture | Hybrid PSR+SSR - no optocoupler or TL431 required; FB pin senses output voltage directly on secondary side for tight CV regulation (VREF = 1.00V ±0.9%). |
| Protection Suite | OVP (primary-sense & secondary-sense), POCP, real OLP (via IS pin), SCP, B/O & B/I (internal/external), thermal shutdown (150°C), Ext.P - reduces need for discrete protection ICs. |
| Quiescent Current | 300µA (VCC), 300µA (VDD) - enables sub-30mW no-load consumption compliant with DoE Level VI and CoC Tier 2. |
| Switching Frequency | 20–85kHz (PFM/PWM hybrid) - auto-adjusts to load; minimizes audible noise at light loads while maintaining efficiency at full load. |
Pinout & Package
MPX2001GY-Z is packaged in SOICW20 (wide-body 20-pin surface-mount), with pin 9 as NC and dual ground pins (PGND at pins 2 & 7; SGND at pins 14 & 20) for primary/secondary domain separation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PEP) | External primary protection input | Accepts fault signal (e.g., MOSFET overtemperature or auxiliary-winding OVP); triggers latch-off with 300µs delay - enables system-level safety interlocks. |
| 4 (CS) | Primary peak current sense | Samples MOSFET drain current via shunt; sets current limit (0.6V typ) and enables sensing-short protection (VSCP = 0.9V) - prevents false triggering during line transients. |
| 6 (PDrv) | Primary MOSFET gate driver output | Drives external HV MOSFET with 9.9V high-level (VCC=12V), 100mV low-level, 30ns rise time - ensures fast turn-on/turn-off and low switching loss. |
| 11 (SRD) | SR MOSFET drain voltage sense | Detects SR FET drain-to-source voltage; triggers turn-off at -10 to +10mV threshold - enables zero-voltage switching (ZVS) in DCM and prevents reverse conduction in CCM. |
| 12 (SDrv) | Secondary SR MOSFET gate driver output | Delivers 10.5V drive (VDD=10.5V), 110ns max turn-off delay, 200ns turn-on delay - synchronizes SR timing to primary switch with <1.9µs min on-time control. |
| 18 (FB) | Secondary-side voltage feedback input | Connects to output divider; references 1.00V internal bandgap - achieves ±1% CV accuracy without optocoupler drift or aging effects. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive isolation barrier | Enables bidirectional sync signaling between primary and secondary domains - eliminates optocoupler latency and enables true CCM SR operation. |
| Adjustable cable drop compensation | CP pin accepts 1µF capacitor + parallel resistors - compensates for voltage drop across USB-C cables up to 3A, maintaining ±5% output regulation at connector. |
| Real secondary-sense overload protection | IS pin monitors output current via sense resistor; triggers OLP at 40mV (±2mV) with 68ms delay - protects battery packs and downstream USB-PD devices from overcurrent faults. |
| Internal/external brown-in/out selection | EBO pin configures sensing path: external resistor divider for precise, adjustable thresholds (VEBO-ON = 1.10V) or short-to-PGND for internal HV-based detection (VHV-ON = 106V). |
| 100% production HIPOT tested | Every unit screened at 4500Vrms/50Hz - guarantees isolation integrity for safety-critical consumer and industrial power supplies. |
Applications
| USB PD 45W Adapter | Smart Appliance SMPS |
|---|---|
|
Use Scenario: Compact wall adapter delivering 5V/3A, 9V/3A, 15V/3A, and 20V/2.25A with EMI compliance per EN55022 Class B. IC Role / Device Role / Timing Role: All-in-one controller managing primary PWM, secondary CV/CC regulation, and SR timing via capacitive isolation - replaces 3–4 discrete ICs. Use Value: Achieves >92% peak efficiency at 220VAC input and <30mW no-load consumption - meets DoE Level VI and EU CoC Tier 2 requirements without auxiliary bias winding. |
Use Scenario: 24V/2A offline power supply for smart washing machine control board with surge immunity and thermal derating. IC Role / Device Role / Timing Role: Primary-side HV start-up + secondary-side precision regulation + adaptive SR drive - enables single-transformer design with <5mm creepage. Use Value: Integrated brown-in/out (106V/96V) and real OLP (40mV) prevent nuisance tripping during motor startup surges and ensure safe shutdown under short-circuit conditions. |
| Offline Li-ion Charger | High-Density Industrial PSU |
|
Use Scenario: 12.6V/3A constant-voltage/constant-current charger for 3S Li-ion battery packs in cordless power tools. IC Role / Device Role / Timing Role: Secondary-side FB loop regulates output voltage; IS pin implements CC mode via current-sense resistor; SRD/SDrv enable ZVS in DCM for >90% efficiency at 10% load. Use Value: Cable drop compensation (CP pin) maintains ±0.5V output tolerance at battery terminals despite 0.5Ω PCB trace resistance - improves charge termination accuracy. |
Use Scenario: 48V/1A isolated auxiliary supply for PLC I/O modules operating in -40°C to +85°C ambient with 10-year field life. IC Role / Device Role / Timing Role: Dual OTP (150°C, 40°C hysteresis) and 100% HIPOT-tested isolation - ensures reliability in thermally constrained enclosures. Use Value: SOICW20 package with θJA = 55°C/W enables natural-convection cooling without heatsink - reduces BOM cost and assembly steps. |
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 | Uses transformer-coupled communication instead of capacitive isolation; higher VCC UVLO (12.5V); no integrated HV current source - requires external startup circuit. | Requires optocoupler or auxiliary winding for feedback; less suitable for ultra-low no-load designs due to higher quiescent current (500µA). | Preferred when legacy transformer feedback topology must be retained or when higher VCC margin is needed for high-VOUT designs. |
| INN3266C-H205 | Integrated primary MOSFET (650V/1.2Ω); no external PDrv needed; uses digital control with configurable parameters via I²C - adds firmware dependency. | Fixed 650V MOSFET limits flexibility for high-efficiency GaN or SiC primary switches; I²C interface increases design complexity for simple analog systems. | Chosen when BOM reduction is prioritized over design flexibility, and digital configurability justifies added validation effort. |
Compared with UCC28780RTWR and INN3266C-H205, MPX2001GY-Z uniquely combines capacitive isolation, integrated HV start-up, and dual-domain protection - enabling optocoupler-free, low-noise, and ultra-low standby designs without sacrificing layout simplicity or thermal robustness.
Availability
MPX2001GY-Z is available at Aetrix Electronics and suitable for USB PD adapters, smart appliance power supplies, offline battery chargers, and high-density industrial PSUs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MPX2001GY-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 analog and power ICs, with core expertise in DC/DC conversion, LED drivers, and AC/DC controllers.
The MPX2001 belongs to MPS's all-in-one flyback controller product line, designed specifically to eliminate optocouplers and auxiliary windings while delivering PSR-grade simplicity with SSR-grade accuracy - targeting compact, efficient, and safety-certifiable offline power solutions.
FAQ
What is the function of the CP pin on MPX2001GY-Z?
The CP pin provides programmable cable drop compensation for USB PD applications. A 1µF ceramic capacitor is connected to CP as a low-pass filter, and parallel resistors adjust the compensation voltage. When shorted to SGND, CP is disabled - making it optional for non-USB applications where output voltage regulation is referenced directly at the converter output.
Does MPX2001GY-Z require an external optocoupler?
No. MPX2001GY-Z uses capacitive isolation to transmit synchronization signals between primary and secondary domains, eliminating the need for an optocoupler or TL431. Output voltage regulation is performed via the FB pin on the secondary side, and SR timing is synchronized internally - reducing component count and improving reliability.
How does the MPX2001GY-Z handle brown-in/brown-out detection?
It supports dual-mode brown-in/out: internal mode uses HV pin sensing (VHV-ON = 106V, VHV-OFF = 96V), while external mode uses EBO pin with user-defined resistor divider (VEBO-ON = 1.10V). The mode is auto-configured at startup - EBO shorted to PGND selects internal mode; EBO connected to divider selects external mode for tighter tolerance and adjustability.
What is the maximum continuous output power supported by MPX2001GY-Z?
MPX2001GY-Z is validated for up to 45W output in reference designs (e.g., EVKT-MPX2001-45-PD). Its SOICW20 package has θJA = 55°C/W and 2.3W max power dissipation at 25°C ambient. At 40°C ambient, thermal derating limits practical continuous output to ~36W with standard 4-layer PCB layout and natural convection cooling.
Can MPX2001GY-Z drive GaN or SiC primary switches?
Yes. PDrv outputs 9.9V (VCC=12V) with 30ns rise time and 100mV low-level - compatible with enhancement-mode GaN HEMTs and SiC MOSFETs requiring 5–12V gate drive. However, external gate resistors and negative turn-off bias may be needed for optimal switching behavior and dV/dt immunity in high-frequency GaN designs.
What protection features are implemented on the secondary side?
Secondary-side protections include real output overload protection (OLP) via IS pin (40mV threshold, 68ms delay), VDD UVLO (4.3V rising, 3.8V falling), internal thermal shutdown (150°C), and COMP-based OVP. These operate independently of primary-side protections and provide fail-safe response to output short circuits, overloads, and regulator faults.
Is MPX2001GY-Z RoHS and halogen-free compliant?
Yes. MPX2001GY-Z is lead-free, halogen-free, and fully compliant with the EU RoHS Directive 2011/65/EU. MPS confirms green status on its official quality assurance portal, and the SOICW20 package uses matte tin (Sn) lead finish with JEDEC J-STD-020 moisture sensitivity level MSL3.
MPX2001GY-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Isolated
- Internal Switch(s):
- No
- Voltage - Breakdown:
- -
- Topology:
- Flyback
- Voltage - Start Up:
- -
- Voltage - Supply (Vcc/Vdd):
- 9V ~ 24V
- Duty Cycle:
- 50%
- Frequency - Switching:
- 85kHz
- Power (Watts):
- 2.3 W
- Fault Protection:
- Current Limiting, Over Load, Over Power, Over Temperature, Over Voltage, Short Circuit
- Control Features:
- EN, Frequency Control, Soft Start, Sync
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 20-SOIC
- Mounting Type:
- Surface Mount
MPX2001GY-Z FAQ
1.How can I place an order for MPX2001GY-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPX2001GY-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 MPX2001GY-Z reliable?
The price and inventory of MPX2001GY-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPX2001GY-Z is usually 5 days.
3.What payment methods are accepted for MPX2001GY-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPX2001GY-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPX2001GY-Z?
MPX2001GY-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPX2001GY-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 MPX2001GY-Z?
For technical support, including MPX2001GY-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPX2001GY-Z requirements.
6.How does Aetrix verify that MPX2001GY-Z is sourced from the original manufacturer or authorized distributors?
All MPX2001GY-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 MPX2001GY-Z meets industry standards.
7.What is the process for return or replacement of MPX2001GY-Z?
All MPX2001GY-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPX2001GY-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 MPX2001GY-Z part is unused and in its original packaging.
Return procedure for MPX2001GY-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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