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STMicroelectronics STDLED623
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- Part No.:
- STDLED623
- Manufacturer:
- STMicroelectronics
- Category:
- FETs, MOSFETs
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
STDLED623.pdf
- Description:
- MOSFET N-CH 620V 3A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:7,533
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Product details
Overview
STDLED623 from STMicroelectronics is an N-channel 620 V, 3.0 Ω typ. (at VGS = 10 V, ID = 1.1 A), 3.0 A Power MOSFET in DPAK (TO-252) package, designed for high-efficiency LED lighting drivers operating in buck-boost and flyback topologies with high dv/dt immunity and Zener-protected gate.
For engineers reviewing the STDLED623 datasheet, STDLED623 pinout, STDLED623 application, or STDLED623 equivalent, this device is selected for its 12 V/ns peak diode recovery voltage slope, 100% avalanche tested reliability, low 350 pF input capacitance, integrated gate-source Zener (30 V breakdown), and suitability in isolated AC/DC LED drivers requiring robust unclamped inductive switching capability.
Technical Context
This MOSFET employs a planar high-voltage process optimized for LED driver SMPS stages, featuring a built-in back-to-back Zener structure across gate-source to suppress transients without external clamps. Its 2.78 °C/W junction-to-case thermal resistance enables stable operation at 45 W total dissipation under heatsinked conditions.
The device delivers fast switching with 8 ns turn-on delay and 22 ns fall time (VDD = 310 V, RG = 4.7 Ω), while maintaining low reverse recovery charge (900 nC typical at Tj = 25 °C) and 200 ns trr - critical for minimizing losses in high-frequency flyback converters driving constant-current LED strings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 620 V - supports full mains input range (e.g., 230 VAC with 2× safety margin) in offline LED drivers |
| RDS(on) max | 3.6 Ω - ensures <1.2 W conduction loss at 3.0 A continuous drain current in thermally constrained LED modules |
| ID (cont) | 3.0 A at TC = 25 °C - matches typical output current requirements of 20–40 W LED ballasts |
| EAS | 100 mJ - enables reliable unclamped inductive switching in flyback primary-side without snubber redesign |
| Ciss | 350 pF - reduces gate drive power demand and improves efficiency in 50–100 kHz LED driver switching frequencies |
| dv/dt rating | 12 V/ns - prevents false turn-on during high-slew-rate transient events in noisy industrial LED installations |
| VGS(th) | 3.0–4.5 V - compatible with standard 5 V or 10 V gate drivers without level-shifting complexity |
Pinout & Package
STDLED623 is housed in a DPAK (TO-252) surface-mount package with exposed drain tab for thermal and electrical connection to PCB copper pour or heatsink. The package complies with ECOPACK® environmental standards and supports tape-and-reel automated assembly (2500 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (G) | Gate | Control terminal; accepts 10 V logic-level drive; protected by integrated 30 V Zener diode |
| 2 (D / TAB) | Drain / Thermal Pad | Main high-voltage switching node; electrically and thermally connected to exposed metal tab |
| 3 (S) | Source | Power return path and reference for gate drive; tied to source of driver IC in high-side configurations |
Key Features
| Feature | Design Value |
|---|---|
| 100% avalanche tested | Guarantees single-pulse EAS ≥ 100 mJ and repetitive avalanche capability up to 2.7 A - eliminates need for external avalanche protection circuits |
| Extremely high dv/dt capability | 12 V/ns rated slope - prevents spurious turn-on during fast voltage transients in dimmable LED systems with trailing-edge phase-cut inputs |
| Very low intrinsic capacitance | Ciss = 350 pF, Coss = 27 pF - minimizes switching losses and EMI generation in compact LED driver PCB layouts |
| Improved diode reverse recovery | Qrr = 900 nC, trr = 200 ns - reduces voltage overshoot and ringing during flyback demagnetization, easing EMI filter design |
| Zener-protected gate | Integrated 30 V bidirectional Zener - absorbs ±20 V gate transients per IEC 61000-4-2 Level 4, removing external TVS requirement |
Applications
| LED Street Lighting Driver | Commercial Downlight Flyback Converter |
|---|---|
|
Use Scenario: Outdoor 100–150 W LED street lamp operating from 230 VAC with PFC + flyback secondary-side regulation. IC Role / Device Role / Timing Role: Primary-side high-voltage switch in discontinuous conduction mode (DCM) flyback topology, handling 620 V blocking and 3.0 A peak current. Use Value: Avalanche ruggedness (100 mJ EAS) tolerates transformer leakage inductance spikes without snubber, reducing BOM count and board area. |
Use Scenario: Dimmable 20–40 W commercial downlight using trailing-edge (ELV) dimmer-compatible flyback controller. IC Role / Device Role / Timing Role: Main power switch synchronized to 50–100 kHz PWM frequency; gate driven directly from 10 V controller output. Use Value: Low Ciss (350 pF) and fast switching (8 ns td(on)) enable >90% efficiency at light loads while meeting Class C conducted EMI limits. |
| Industrial LED Panel Light | Emergency Lighting DC-DC Stage |
|
Use Scenario: IP66-rated 60 W LED panel light for factory environments with wide ambient temperature range (−40 °C to +85 °C). IC Role / Device Role / Timing Role: Buck-boost switch in constant-current regulated stage, operating with 12–48 V DC input and 35–42 V LED string output. Use Value: Stable RDS(on) over temperature (±15% from −55 °C to 150 °C) ensures consistent current regulation across thermal cycling. |
Use Scenario: Battery-backed emergency lighting unit with 24 V lead-acid input and isolated 36 V LED output via flyback converter. IC Role / Device Role / Timing Role: Primary-side switch managing 24 V to 36 V conversion during battery discharge, with high dv/dt immunity against load dump transients. Use Value: 12 V/ns dv/dt rating prevents false triggering during 100 V/ms battery line transients, ensuring fail-safe illumination during power outage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage LED driver MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP6N62FD | 620 V, 1.8 Ω typ., TO-220 package, no integrated Zener | Higher RDS(on) not required; needs external gate protection; better for through-hole prototyping | Select when lower on-resistance is prioritized and board space allows larger package with discrete Zener |
| FQP6N62 | 620 V, 2.2 Ω typ., TO-220, no avalanche rating or Zener | Lacks 100% avalanche test and gate Zener; requires external TVS and snubber design effort | Choose only for cost-sensitive non-critical indoor lighting where transient immunity is less stringent |
Compared with STP6N62FD and FQP6N62, STDLED623 offers superior system-level robustness in LED drivers due to its integrated Zener protection, guaranteed avalanche performance, and DPAK thermal profile - enabling smaller heatsinks and eliminating two external components without sacrificing reliability.
Availability
STDLED623 is available at Aetrix Electronics and suitable for LED street lighting drivers, commercial downlight flyback converters, and industrial panel light buck-boost stages requiring stable component supply and long-term production continuity.
Supply support for STDLED623 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
STDLED623 belongs to ST's "LED-specific Power MOSFET" product line, engineered explicitly for high-reliability, high-efficiency offline LED drivers - emphasizing avalanche ruggedness, fast switching, and integrated gate protection to simplify lighting system design.
FAQ
Is STDLED623 suitable for use in automotive LED headlamp drivers?
No. STDLED623 is not qualified for automotive applications and lacks AEC-Q101 certification, temperature grade extension beyond 150 °C junction, or automotive-grade reliability testing. ST explicitly states it is not authorized for automotive or safety-critical use. For headlamps, consider ST's AEC-Q101-qualified STL6N62M or similar.
What is the maximum recommended gate resistor value for reliable switching?
Based on the datasheet's switching time test condition (RG = 4.7 Ω), and considering Qg = 15.5 nC and gate threshold of 3.6 V typical, the maximum recommended RG is 10 Ω. Higher values increase switching losses and risk incomplete turn-on during fast transitions, especially at elevated temperatures.
Does STDLED623 require a heatsink in a 45 W LED driver application?
Yes. With PTOT = 45 W and Rthj-case = 2.78 °C/W, even with ideal heatsinking (Rthcase-amb ≈ 1 °C/W), junction temperature would exceed 150 °C without active or substantial passive cooling. A minimum 15 cm² copper pour with 2 oz Cu and thermal vias is required; forced-air or aluminum heatsink is strongly advised for continuous operation.
Can STDLED623 replace STULED623 in the same PCB footprint?
No. Although both share identical electrical specs, STDLED623 uses DPAK (TO-252) while STULED623 uses IPAK (TO-251). Their footprints differ: DPAK has 2.28 mm lead pitch and 6.4 mm body width; IPAK has 2.28 mm pitch but 9.2 mm length and different tab geometry. Mechanical redesign is required for substitution.
STDLED623 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 620 V
- Current - Continuous Drain (Id) @ 25°C:
- 3A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 3.6Ohm @ 1.1A, 10V
- Vgs(th) (Max) @ Id:
- 4.5V @ 50µA
- Gate Charge (Qg) (Max) @ Vgs:
- 15.5 nC @ 10 V
- Vgs (Max):
- ±30V
- Input Capacitance (Ciss) (Max) @ Vds:
- 350 pF @ 50 V
- FET Feature:
- -
- Power Dissipation (Max):
- 45W (Tc)
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DPAK
STDLED623 FAQ
1.How can I place an order for STDLED623 through Aetrix?
Please submit a Request for Quotation (RFQ) for STDLED623 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 STDLED623 reliable?
The price and inventory of STDLED623 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STDLED623 is usually 5 days.
3.What payment methods are accepted for STDLED623?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STDLED623 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STDLED623?
STDLED623 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STDLED623 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 STDLED623?
For technical support, including STDLED623 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STDLED623 requirements.
6.How does Aetrix verify that STDLED623 is sourced from the original manufacturer or authorized distributors?
All STDLED623 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 STDLED623 meets industry standards.
7.What is the process for return or replacement of STDLED623?
All STDLED623 units undergo pre-shipment inspection (PSI). If there is an issue with STDLED623, 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 STDLED623 part is unused and in its original packaging.
Return procedure for STDLED623:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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