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Monolithic Power Systems Inc. MP4050GJ-Z
- Part No.:
- MP4050GJ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MP4050GJ-Z.pdf
- Description:
- IC LED DRIVER OFFL TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,869
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Product details
Overview
MP4050GJ-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 systems. It delivers stable 115mA output current at 40V with audible-noise-free operation above 22kHz switching frequency and features thermal shutdown, open/short lamp protection, and internal high-voltage startup current source.
For engineers reviewing the MP4050GJ-Z datasheet, MP4050GJ-Z pinout, MP4050GJ-Z application, or MP4050GJ-Z equivalent, key selection criteria include its TSOT23-5 package footprint, drain-referenced high-voltage startup capability, PRO-pin fault-sensing architecture, and design suitability for cost-sensitive, space-constrained LED lighting where isolation is not required.
Technical Context
The MP4050GJ-Z implements an average-current-controlled buck topology with internal peak-current limiting (0.45V threshold) and leading-edge blanking (200ns) to reject turn-on spikes. Its VCC regulation uses a drain-connected high-voltage current source that autonomously charges the VCC capacitor without auxiliary windings or external bias circuitry.
Protection logic operates via the PRO pin: voltage >2.0V triggers open-lamp hiccup mode; voltage <0.39V initiates short-lamp hiccup recovery. Thermal shutdown activates at 150°C with 60°C hysteresis, and UVLO engages between 4.2V (turn-on) and 4.65V (turn-off) on VCC with built-in hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 85–265VAC or DC; enables universal-line LED retrofit without transformer or isolated flyback. |
| Integrated MOSFET | 500V BVDSS, 7.2Ω RDS(on); eliminates external high-voltage switch and reduces BOM count. |
| Switching Frequency | >22kHz; ensures silent operation by avoiding audible noise band in consumer lighting. |
| Current Regulation Accuracy | ±5% over line/load/temperature; achieved via internal 0.194V reference and averaging feedback loop. |
| PRO Pin Protection Thresholds | OVP = 2.0V ±0.1V, UVP = 0.39V ±0.04V; enables reliable open/short lamp detection without external comparators. |
| VCC UVLO Hysteresis | 0.24V typical; provides stable start-up and brown-out recovery with minimal external capacitance. |
| Thermal Shutdown | 150°C trip, 90°C recovery; auto-restarts after fault clearance without manual reset. |
Pinout & Package
MP4050GJ-Z is housed in a thermally enhanced TSOT23-5 surface-mount package with exposed pad for improved heat dissipation in compact LED modules.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VCC) | Internal bias supply rail | Accepts 4.5–4.7V; powered by internal HV current source from DRAIN; supports self-starting without auxiliary winding. |
| 2 (PRO) | Fault-sensing input | Detects open lamp (>2.0V) or short lamp (<0.39V); initiates hiccup-mode restart on fault. |
| 3 (GND) | Analog/digital ground reference | Common return for control circuitry and current-sense path; must be low-impedance connection. |
| 4 (SOURCE) | MOSFET source terminal & current sense node | Connects to external sense resistor (R1); 0.45V peak-current limit sets LED current IOUT = 0.194V/R1. |
| 5 (DRAIN) | High-voltage power switch terminal | Connects directly to rectified AC line; integrates 500V MOSFET and HV startup current source (5mA typ). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 500V MOSFET | Reduces component count by eliminating external HV switch and associated gate drive circuitry. |
| Audible-noise suppression | Minimum 22kHz switching frequency prevents perceptible buzz in residential/commercial lighting. |
| Self-powered VCC regulation | Internal HV current source draws from DRAIN pin-no auxiliary winding or bias supply needed. |
| Leading-edge blanking | 200ns internal blanking window rejects turn-on current spikes, improving current-sense reliability. |
| Hiccup-mode fault recovery | Open/short lamp faults trigger automatic restart cycles instead of latching shutdown, enabling unattended recovery. |
Applications
| LED Bulk Lamp Replacement | Industrial Panel Indicator Lighting |
|---|---|
Use Scenario: Retrofitting incandescent or CFL bulbs in E26/E27 sockets with direct AC mains connection. IC Role / Device Role / Timing Role: Constant-current LED driver implementing non-isolated buck topology with integrated HV MOSFET and self-biasing. Use Value: Eliminates isolation transformers and reduces bill-of-materials by 30%, enabling sub-$1.50 BOM cost for 8W LED lamps. | Use Scenario: Powering status LEDs on factory HMIs, PLCs, and control panels operating from 100–240VAC mains. IC Role / Device Role / Timing Role: Primary LED current regulator with open-circuit detection to signal failed indicators without system-level intervention. Use Value: PRO-pin fault sensing enables autonomous lamp health monitoring-reducing maintenance downtime in industrial environments. |
| Architectural Accent Lighting | Automotive Interior Ambient Lighting |
Use Scenario: Low-profile linear LED strips mounted behind coves or under cabinets in commercial interiors. IC Role / Device Role / Timing Role: Compact, non-isolated current source delivering stable brightness across wide input voltage range (85–265VAC). Use Value: TSOT23-5 footprint allows placement directly on narrow PCBs (<5mm width), minimizing mechanical intrusion in tight architectural cavities. | Use Scenario: 12–48V DC-powered ambient lighting in vehicle cabins using rectified alternator output or battery-derived DC bus. IC Role / Device Role / Timing Role: DC-input LED driver with thermal foldback and hiccup-mode protection for automotive-grade reliability. Use Value: 150°C thermal shutdown with 60°C hysteresis prevents LED degradation during prolonged cabin heat exposure (e.g., parked in sun). |
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 |
|---|---|---|---|
| MP4051GJ-Z | Same pinout and topology but adds adjustable frequency (22–100kHz) and improved THD performance. | Better suited for designs requiring EMI tuning or higher power factor (>0.7 at 120VAC). | Select when frequency flexibility or tighter THD control is required; otherwise MP4050GJ-Z offers lower cost and simpler layout. |
| BP5758D | Non-isolated buck driver with 650V MOSFET but no integrated PRO-pin protection; requires external OVP/UVP circuitry. | Lacks autonomous open/short lamp detection-increases design complexity and BOM count. | Choose only if higher breakdown voltage is mandatory and fault-sensing can be implemented externally. |
Compared with MP4050GJ-Z, MP4051GJ-Z adds frequency adjustability at minor cost premium, while BP5758D trades integrated protection for higher voltage rating-making MP4050GJ-Z optimal for cost-driven, self-protecting AC-input LED replacements.
Availability
MP4050GJ-Z is available at Aetrix Electronics and suitable for LED bulk lamp replacement, industrial panel indicators, architectural accent lighting, and automotive interior ambient lighting requiring stable component supply and RoHS-compliant packaging.
Supply support for MP4050GJ-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 over two decades of leadership in DC/DC conversion and LED driver innovation.
The MP4050 belongs to MPS's non-isolated LED driver product line, engineered specifically for cost-sensitive, space-constrained AC-input LED lighting where galvanic isolation is unnecessary and integration reduces system size and cost.
FAQ
What is the minimum output capacitor value recommended for stable operation?
The datasheet specifies a 47μF/50V electrolytic capacitor for the 40V/115mA reference design. For stable regulation and ripple control, use ≥47μF low-ESR capacitors-ceramic or polymer types preferred for temperatures below –20°C due to reduced capacitance drift.
Can MP4050GJ-Z operate from a pure DC input?
Yes-MP4050GJ-Z supports DC input voltages corresponding to rectified AC ranges (e.g., 120VDC to 375VDC). The internal HV current source starts from DRAIN regardless of AC/DC source, and all protections (TSD, OLP, SCP) remain fully functional under DC operation.
How does the PRO pin detect open vs. short lamp conditions?
During MOSFET off-time, the PRO pin voltage reflects the LED string voltage divided by the R2/R3 feedback network. If VPRO > 2.0V, open lamp is detected; if VPRO < 0.39V, short lamp is flagged. Both trigger hiccup-mode restart with VCC discharge/recharge cycling until fault clears.
What is the purpose of the 200ns leading-edge blanking (LEB)?
The 200ns LEB disables the current comparator immediately after MOSFET turn-on to ignore parasitic drain-source current spikes caused by circuit stray capacitance. This prevents false overcurrent triggering and ensures accurate peak-current limiting during normal conduction.
Does MP4050GJ-Z require an external startup resistor?
No-MP4050GJ-Z incorporates an internal high-voltage current source connected to the DRAIN pin that supplies ~5mA to charge the VCC capacitor. This eliminates the need for external high-voltage startup resistors, reducing component count and power loss.
What thermal derating applies in TSOT23-5 package at 90°C ambient?
With θJA = 100°C/W, maximum continuous power dissipation drops to 0.6W at 90°C ambient (PDMAX = (150°C − 90°C)/100°C/W). Derate output current accordingly-e.g., from 115mA to ~90mA at full load-to avoid thermal shutdown in enclosed fixtures.
MP4050GJ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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:
- TSOT-23-5
MP4050GJ-Z FAQ
1.How can I place an order for MP4050GJ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4050GJ-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 MP4050GJ-Z reliable?
The price and inventory of MP4050GJ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4050GJ-Z is usually 5 days.
3.What payment methods are accepted for MP4050GJ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4050GJ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4050GJ-Z?
MP4050GJ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4050GJ-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 MP4050GJ-Z?
For technical support, including MP4050GJ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4050GJ-Z requirements.
6.How does Aetrix verify that MP4050GJ-Z is sourced from the original manufacturer or authorized distributors?
All MP4050GJ-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 MP4050GJ-Z meets industry standards.
7.What is the process for return or replacement of MP4050GJ-Z?
All MP4050GJ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4050GJ-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 MP4050GJ-Z part is unused and in its original packaging.
Return procedure for MP4050GJ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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