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Monolithic Power Systems Inc. MP4050GS-Z
- Part No.:
- MP4050GS-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP4050GS-Z.pdf
- Description:
- IC LED DRIVER OFFL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,069
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Product details
Overview
MP4050GS-Z from Monolithic Power Systems is a non-isolated, constant-current LED driver IC with an integrated 500V/7.2Ω MOSFET, designed for AC/DC bulk LED replacement in 85–265VAC input applications. It delivers stable 115mA output current at 40V with internal averaging current feedback, operates above 22kHz to suppress audible noise, and includes thermal shutdown, open/short lamp protection, and VCC UVLO.
For engineers reviewing the MP4050GS-Z datasheet, MP4050GS-Z pinout, MP4050GS-Z application, or MP4050GS-Z equivalent, key selection criteria include its integrated high-voltage MOSFET capability, non-isolated buck topology suitability, PRO pin fault-sensing behavior, and SOIC8 package thermal performance (θJA = 96°C/W) for industrial lighting designs.
Technical Context
The MP4050GS-Z implements a primary-side-controlled buck converter with internal peak-current-mode regulation and average current feedback. Its operation relies on sampling the SOURCE pin voltage (0.45V typical peak limit) and comparing VFB (0.194V reference) to maintain constant LED current without secondary-side sensing.
Protection logic is tightly coupled to the PRO pin: open-lamp detection triggers when VPRO exceeds 2.0V (21μs timeout), short-lamp when VPRO falls below 0.39V; both initiate hiccup-mode restart via VCC discharge/recharge cycles governed by internal 18μA current source and VCCPRO (2.35V) threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 85–265VAC or DC; enables universal mains compatibility without external rectifier biasing. |
| Integrated MOSFET | 500V breakdown, 7.2Ω RDS(on); eliminates external HV switch and reduces BOM count in non-isolated designs. |
| Constant Current Accuracy | ±5% over line/load/temperature; achieved via internal 0.194V VFB reference and 0.45V peak current limit. |
| Switching Frequency | >22kHz minimum; prevents audible noise in lighting applications by avoiding 20Hz–20kHz range. |
| Thermal Shutdown | 150°C trip with 60°C hysteresis; auto-restarts only after junction cools to 90°C, ensuring safe thermal recovery. |
| VCC UVLO Threshold | 4.4V turn-on / 4.65V turn-off; provides clean start-up and brown-out immunity with 0.24V hysteresis. |
| PRO Pin Protection | Detects open lamp (>2.0V) and short lamp (<0.39V); initiates controlled hiccup-mode recovery without latch-off. |
Pinout & Package
MP4050GS-Z is housed in an SOIC-8 package with exposed pad (not electrically connected), optimized for thermal dissipation in compact LED drivers. Pin functions are validated per MPS datasheet Rev.1.03, with Pins 5, 6, and 8 designated as No Connect (N.C.).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Internal regulator supply input | Accepts 4.5–4.7V; powered by internal HV current source from DRAIN; enables self-biasing without auxiliary winding. |
| PRO (Pin 2) | Fault sense input | Monitors LED string voltage during MOSFET off-time; triggers OVP/UVP protection with 21μs/28μs comparator delay. |
| GND (Pin 3) | Signal and power ground | Reference for all analog blocks; must be low-impedance connection to minimize noise coupling into PRO/VFB paths. |
| SOURCE (Pin 4) | MOSFET source terminal & current sense | Connects to LED cathode in buck topology; carries full LED current; sets IOUT via external RSENSE (IOUT = 0.194V/RSENSE). |
| DRAIN (Pin 7) | MOSFET drain & HV startup node | Connects directly to rectified AC line; supplies internal 5mA startup current; withstands 500V transient stress. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 500V MOSFET | Reduces component count by eliminating external HV switch; supports direct connection to 265VAC rectified bus. |
| Audible-noise suppression | Minimum 22kHz switching frequency ensures operation outside human hearing range, critical for residential lighting. |
| Internal leading-edge blanking | 200ns blanking window prevents false current-limit triggering from parasitic turn-on spikes at DRAIN/SOURCE nodes. |
| Hiccup-mode fault recovery | Open/short lamp faults trigger controlled VCC discharge to 2.35V followed by regulated recharge-no manual reset required. |
| Self-powered VCC regulation | Internal HV current source eliminates need for auxiliary winding or startup resistor, simplifying transformerless designs. |
Applications
| LED Bulk Lamp Replacement | Industrial Panel Lighting |
|---|---|
Use Scenario: Retrofitting E26/E27 screw-base A19 lamps with 85–265VAC input and 40V/115mA LED load. IC Role / Device Role / Timing Role: Primary-side constant-current controller in non-isolated buck topology; regulates LED current without optocoupler or secondary sensing. Use Value: Enables <10-component BOM with SOIC8 footprint, meeting ENERGY STAR® lumen-maintenance requirements over temperature. | Use Scenario: Driving linear LED arrays in factory control panels under 230VAC industrial mains with ambient up to 90°C. IC Role / Device Role / Timing Role: High-voltage LED driver with thermal foldback; maintains stable current despite enclosure temperature rise. Use Value: SOIC8 θJA = 96°C/W allows 1W continuous dissipation at TA = 90°C, supporting 12W output without heatsink. |
| Architectural Accent Lighting | Commercial Downlight Drivers |
Use Scenario: Low-profile recessed LED strips in hospitality ceilings powered from 120VAC branch circuits. IC Role / Device Role / Timing Role: Non-isolated buck controller with PRO-pin-based open-circuit detection; ensures fail-safe dimming compatibility. Use Value: 21μs OVP response time prevents LED string overvoltage during hot-plug events, satisfying UL 1310 Class 2 compliance. | Use Scenario: 15W downlights using 40V/350mA LED modules with surge immunity to 1kV differential line transients. IC Role / Device Role / Timing Role: Constant-current driver with integrated MOV-compatible surge handling via input capacitor optimization. Use Value: Supports 4.7μF input capacitance per IEC61000-4-5 Level 3, enabling 1kV surge pass without additional TVS components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP4051GS-Z | Same SOIC8 package; adds programmable frequency (22–100kHz) and improved THD; no change in PRO pin logic. | Preferred for EMI-sensitive environments requiring adjustable switching frequency; identical thermal profile. | Select MP4051GS-Z when frequency tuning is needed to avoid AM band interference or optimize efficiency at specific loads. |
| BP5758D | Non-isolated buck driver with 500V MOSFET but no PRO pin; uses VDD-based OVP; lower accuracy (±8% IOUT). | Lacks hiccup-mode open/short lamp recovery; requires external circuitry for lamp fault indication. | Choose BP5758D only for cost-driven, non-safety-critical replacements where fault diagnostics are omitted. |
Compared with MP4050GS-Z, MP4051GS-Z offers design flexibility through frequency programming while maintaining identical protection architecture, whereas BP5758D sacrifices fault intelligence and current accuracy for lower unit cost-making MP4050GS-Z the balanced choice for reliable, certified LED replacements.
Availability
MP4050GS-Z is available at Aetrix Electronics and suitable for LED bulk lamp replacement, industrial panel lighting, and architectural accent lighting requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.
Supply support for MP4050GS-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 motor control.
The MP4050 product line targets cost-sensitive, non-isolated AC/DC LED lighting applications-delivering integrated HV MOSFETs, self-powered operation, and robust fault protection in compact packages.
FAQ
What is the maximum output power achievable with MP4050GS-Z in SOIC8 package at 90°C ambient?
At 90°C ambient and 265VAC input, the SOIC8 package supports up to 12W output (40V/300mA) before thermal shutdown activates, based on θJA = 96°C/W and 150°C max junction temperature. Derating is required above 90°C ambient per Figure 10's V-I curve.
Can MP4050GS-Z operate with DC input only, and what is the minimum DC voltage?
Yes, MP4050GS-Z supports DC input down to 12VDC minimum, verified by the VCC start-up requirement (VCCON = 4.2V) and internal HV current source functionality. Below 12VDC, the internal regulator cannot sustain VCC above 4.2V during full-load operation.
How does the PRO pin detect open lamp versus short lamp conditions?
The PRO pin monitors LED string voltage during MOSFET off-time: open lamp raises VPRO above 2.0V (OVP threshold), while short lamp pulls VPRO below 0.39V (UVP threshold). Both trigger hiccup-mode recovery with 21μs and 28μs comparator delays respectively.
Is an external startup resistor required for MP4050GS-Z?
No. MP4050GS-Z uses an internal high-voltage current source connected to the DRAIN pin to charge the VCC capacitor, eliminating the need for external startup resistors or auxiliary windings in transformerless designs.
What is the purpose of the 200ns leading-edge blanking (LEB) function?
The 200ns LEB disables the current comparator immediately after MOSFET turn-on to prevent false triggering from parasitic drain-source voltage spikes caused by layout inductance and diode reverse recovery, ensuring stable peak-current limiting.
Does MP4050GS-Z support dimming, and if so, what method?
MP4050GS-Z does not integrate analog or PWM dimming control. Dimming must be implemented externally via TRIAC phase-cut or 0–10V interface upstream of the AC input, as the IC regulates only constant current-not brightness directly.
What is the recommended decoupling capacitance for the PRO pin in SOIC8 layout?
A 30pF ceramic capacitor is recommended between PRO and GND for SOIC8 layouts to suppress high-frequency noise coupling, per MPS layout guidelines. This value balances noise immunity against stability-larger values may delay OVP response.
MP4050GS-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- AC DC Offline Switcher
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 85VAC
- Voltage - Supply (Max):
- 265VAC
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- -
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MP4050GS-Z FAQ
1.How can I place an order for MP4050GS-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4050GS-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 MP4050GS-Z reliable?
The price and inventory of MP4050GS-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4050GS-Z is usually 5 days.
3.What payment methods are accepted for MP4050GS-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4050GS-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4050GS-Z?
MP4050GS-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4050GS-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 MP4050GS-Z?
For technical support, including MP4050GS-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4050GS-Z requirements.
6.How does Aetrix verify that MP4050GS-Z is sourced from the original manufacturer or authorized distributors?
All MP4050GS-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 MP4050GS-Z meets industry standards.
7.What is the process for return or replacement of MP4050GS-Z?
All MP4050GS-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4050GS-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 MP4050GS-Z part is unused and in its original packaging.
Return procedure for MP4050GS-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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