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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

STMicroelectronics STDLED656

Name: STDLED656
Brand: STMicroelectronics
SKU: STDLED656
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STDLED656

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: STDLED656.pdf

Description:: MOSFET N-CH 650V 6A DPAK

Quantity:: RFQ Add To RFQ list

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Inventory:969

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Product details

Overview

STDLED656 from STMicroelectronics is an N-channel 650 V, 1.1 Ω typ. (1.3 Ω max), 6.0 A Power MOSFET in DPAK package, designed for high-efficiency LED lighting power stages. It features Zener-protected gate, 100% avalanche tested operation, and optimized diode reverse recovery for flyback and buck-boost topologies in offline LED drivers.

For engineers reviewing the STDLED656 datasheet, STDLED656 pinout, STDLED656 application, or STDLED656 equivalent, key selection criteria include R_DS(on) at 10 V gate drive, 12 V/ns dv/dt capability, integrated gate Zener protection, and thermal resistance of 4.17 °C/W (junction-to-case) in DPAK.

Technical Context

This MOSFET employs a planar stripe cell structure optimized for low conduction loss and robust unclamped inductive switching. Its gate oxide is engineered for stable threshold voltage (3.0–4.5 V) across −75 °C to 150 °C and includes monolithically integrated back-to-back Zener diodes rated at ±30 V breakdown.

The device delivers 2.5 mJ single-pulse avalanche energy (E_AS) at V_DD = 50 V and supports repetitive avalanche stress up to 5.4 A. Its C_oss,eq of 27 pF (energy-related) and Q_gd/Q_g ratio of ~62% enable fast, low-loss switching in high-voltage LED driver half-bridges.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	650 V - Withstands full mains rectified voltage in universal-input (85–265 V_AC) LED drivers without derating.
R_DS(on) max	1.3 Ω @ V_GS = 10 V, I_D = 2.7 A - Enables <1.5 W conduction loss at 6 A continuous drain current in thermally constrained DPAK layouts.
Q_g	34 nC - Low total gate charge reduces driver power consumption and enables use with low-current gate drivers in cost-sensitive LED ballasts.
dv/dt capability	12 V/ns - Sustains rapid voltage transients during hard-switching in discontinuous conduction mode (DCM) flyback converters.
E_AS	2.5 mJ - Absorbs energy from leakage inductance spikes without external snubbers in compact LED driver PCBs.
T_J max	150 °C - Allows operation in enclosed luminaires with limited airflow when mounted on ≥1 in² 2-oz copper area.
C_oss,eq	27 pF - Low energy-related output capacitance minimizes turn-off loss and improves light-load efficiency in quasi-resonant designs.

Pinout & Package

STDLED656 is housed in a surface-mount DPAK (TO-252) package with exposed drain tab for thermal and electrical connection. The package complies with ECOPACK® environmental specifications and supports tape-and-reel automated assembly (2500 pcs/reel).

Pin/Terminal	Circuit Role	Design Meaning
D (Tab)	Drain terminal / Heat sink interface	Electrically connected to internal drain; must be soldered to large copper pour for thermal management and EMI control.
G (Pin 1)	Gate input	Control node requiring <34 nC charge; protected by integrated ±30 V Zener diodes to prevent ESD damage during handling or layout.
S (Pin 3)	Source reference / Return path	Low-inductance source return essential for stable switching; connects to power ground plane adjacent to gate driver IC.

Key Features

Feature	Design Value
100% avalanche tested	Every unit validated for 2.5 mJ single-pulse and 5.4 A repetitive avalanche, eliminating need for external clamping in LED driver primary switches.
Zener-protected gate	Integrated ±30 V gate-source Zener diodes replace discrete TVS components, reducing BOM count and PCB area in space-constrained LED modules.
Improved diode recovery	trr = 285 ns (T_J = 25 °C), Q_rr = 5100 nC - Reduces switching loss and EMI in secondary-side synchronous rectification and primary-side freewheeling paths.
Extremely high dv/dt capability	12 V/ns immunity - Prevents false turn-on during voltage transients in high-frequency flyback controllers operating above 100 kHz.
Low intrinsic capacitance	C_iss = 895 pF, C_rss = 12.5 pF - Enables clean gate drive waveforms with minimal Miller effect, supporting stable operation with standard 10 Ω gate resistors.

Applications

Smart Residential LED Driver

Industrial LED Streetlight PSU

Use Scenario: 40 W universal-input flyback converter powering tunable-white LED arrays in smart home fixtures.

IC Role / Device Role: Primary-side high-voltage switch handling 6 A peak current at 650 V blocking.

Use Value: Integrated Zener protection eliminates external gate clamp, while 1.3 Ω R_DS(on) maintains >90% efficiency at full load without heatsink.

Use Scenario: 150 W quasi-resonant flyback supplying constant current to high-bay LED luminaires in warehouse environments.

IC Role / Device Role: Main switching element managing 650 V DC link and dissipating ≤3.5 W under continuous operation.

Use Value: 4.17 °C/W R_thj-case enables direct mounting to aluminum housing, reducing thermal interface layers and system cost.

Commercial Downlight Ballast

UV-C LED Disinfection Module

Use Scenario: Dimmable 20 W buck-boost LED driver for recessed downlights with TRIAC phase-cut dimming compatibility.

IC Role / Device Role: High-side switch regulating LED current in buck-boost topology with 12 V/ns dv/dt immunity.

Use Value: Low Q_gd (21 nC) ensures precise PWM control at 1–10 kHz dimming frequencies without shoot-through risk.

Use Scenario: Pulsed 30 W driver for UV-C LEDs requiring short (<100 µs), high-current bursts at 650 V bus voltage.

IC Role / Device Role: Fast-switching primary switch delivering 24 A pulsed drain current (I_DM) with controlled diode recovery.

Use Value: 21.6 A pulsed source-drain current (I_SDM) and 330 ns trr at 150 °C support reliable pulsed operation in sterilization cycles.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP6NK60ZFP	600 V, 1.2 Ω max, TO-220FP package, no integrated Zener	Requires external gate protection; higher R_thj-amb (100 °C/W) limits power density in compact LED modules	Preferred only where through-hole assembly and lower gate charge (27 nC) outweigh need for Zener integration and thermal performance.
FDPF18N50	500 V, 0.38 Ω max, TO-220FP, no avalanche rating specified	Insufficient V_DS margin for universal AC input; lacks 100% avalanche test validation	Acceptable only in fixed-line-voltage (e.g., 230 V_AC only) LED drivers with strict input filtering and derated operation.

Compared with STP6NK60ZFP and FDPF18N50, STDLED656 uniquely combines 650 V rating, integrated Zener protection, and DPAK thermal performance-enabling smaller, more robust LED drivers without gate-clamp components or heatsinks.

Availability

STDLED656 is available at Aetrix Electronics and suitable for smart residential LED drivers, industrial streetlight PSUs, commercial downlight ballasts, and UV-C disinfection modules requiring stable component supply and long-term design continuity.

Supply support for STDLED656 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.

STDLED656 belongs to ST's LED-specific Power MOSFET product line, engineered to simplify high-efficiency, high-reliability offline LED driver designs with integrated protection and optimized switching behavior.

FAQ

Is STDLED656 suitable for use in automotive LED headlamp applications?

No. STDLED656 is not qualified for automotive use and lacks AEC-Q101 certification, junction temperature derating for 125 °C ambient, or failure-in-time (FIT) data required for automotive lighting. Its datasheet explicitly excludes automotive environments per ST's safety disclaimer.

What is the maximum continuous drain current at 100 °C case temperature?

The maximum continuous drain current (I_D) at T_C = 100 °C is 3.3 A, as specified in Table 2 of the preliminary datasheet. This reflects thermal limitation-not SOA-so operation above this current requires active cooling or pulse-width reduction to maintain T_J ≤ 150 °C.

Does STDLED656 require an external gate resistor for stability?

Yes. While the device has low gate charge (34 nC), a gate resistor (typically 4.7–10 Ω) is required to dampen ringing, control dv/dt, and limit peak gate current. Figure 17 in the datasheet specifies RG = 4.7 Ω for switching time measurements, confirming its necessity in production designs.

Can STDLED656 replace STPLED656 in a TO-220-based design?

No. STDLED656 uses a DPAK (TO-252) package with different pinout, thermal interface, and PCB footprint than STPLED656's TO-220 package. Direct replacement would require board redesign, new thermal layout, and revalidation of EMI and thermal performance due to differing R_thj-case (4.17 vs. 1.14 °C/W) and mechanical mounting.

STDLED656 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:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 650 V

Current - Continuous Drain (Id) @ 25°C:: 6A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 10V

Rds On (Max) @ Id, Vgs:: 1.3Ohm @ 2.7A, 10V

Vgs(th) (Max) @ Id:: 4.5V @ 50µA

Gate Charge (Qg) (Max) @ Vgs:: 34 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 895 pF @ 100 V

FET Feature:: -

Power Dissipation (Max):: 70W (Tc)

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

STDLED656 FAQ

1.How can I place an order for STDLED656 through Aetrix?

Please submit a Request for Quotation (RFQ) for STDLED656 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 STDLED656 reliable?

The price and inventory of STDLED656 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STDLED656 is usually 5 days.

3.What payment methods are accepted for STDLED656?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STDLED656 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STDLED656?

STDLED656 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STDLED656 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 STDLED656?

For technical support, including STDLED656 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STDLED656 requirements.

6.How does Aetrix verify that STDLED656 is sourced from the original manufacturer or authorized distributors?

All STDLED656 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 STDLED656 meets industry standards.

7.What is the process for return or replacement of STDLED656?

All STDLED656 units undergo pre-shipment inspection (PSI). If there is an issue with STDLED656, 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 STDLED656 part is unused and in its original packaging.

Return procedure for STDLED656:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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