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STMicroelectronics EVALSTSR30-60W

Name: EVALSTSR30-60W
Brand: STMicroelectronics
SKU: EVALSTSR30-60W
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: EVALSTSR30-60W

Manufacturer:: STMicroelectronics

Category:: DC/DC & AC/DC (Off-Line) SMPS Evaluation Boards

Package:

Datasheet:: EVALSTSR30-60W.pdf

Description:: EVAL BOARD FOR L6668 STSR30

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,178

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Product details

Overview

EVALSTSR30-60W from STMicroelectronics is an evaluation board for the L6668 current-mode primary-side PWM controller IC, designed to demonstrate and validate 60 W offline flyback converters with multi-mode operation (fixed-frequency, frequency foldback, burst-mode), integrated high-voltage start-up, PFC interface, and <2 mA quiescent current - used in notebook adapters and energy-compliant LCD TV power supplies.

For engineers reviewing the EVALSTSR30-60W datasheet, EVALSTSR30-60W pinout, EVALSTSR30-60W application, or EVALSTSR30-60W equivalent, this board enables rapid validation of L6668-based AC-DC designs targeting Blue Angel/Energy Star compliance, light-load efficiency optimization, and PFC pre-regulator coordination in single-ended topologies.

Technical Context

The EVALSTSR30-60W implements a complete 60 W universal-input (90–264 V_AC) flyback reference design using the L6668 controller in SO-16 package. It supports three operational modes: fixed 100 kHz switching at full load, linear frequency foldback down to ~20 kHz under medium load, and burst-mode operation below 5% load with programmable peak-current threshold via SKIPADJ.

Board-level features include direct connection of L6668's HV pin to rectified mains, optocoupler-isolated feedback to COMP, external RCT network setting oscillator frequency, PFC_STOP open-drain output driving a PNP transistor to disable PFC stage at light load, and dedicated test points for VREF (5 V ±4%), ISEN, SS, and STBY signals.

Key Specifications

Parameter	Value and Actual Design Meaning
Rated Power	60 W continuous output at 19 V/3.16 A, validated across 90–264 V_AC input range.
Topology	Primary-side regulated flyback with optocoupler feedback and L6668 current-mode control.
Control Modes	Fixed-frequency (100 kHz), frequency foldback (20–100 kHz), and burst-mode (≤500 Hz) for <300 mW no-load consumption.
PFC Interface	Dedicated PFC_STOP open-drain output (pin 14) with 2.2/2.7 V hysteresis thresholds to disable PFC pre-regulator below 15% load.
Start-up Method	On-board high-voltage start-up generator (pin 1) delivers 0.8 mA charge current to Vcc capacitor, eliminating external bleeder resistor.
Efficiency Compliance	Meets Energy Star v2.0 and EU CoC Tier 2 requirements: ≥85% at 50% load, ≥82% at 10% load, <300 mW no-load input power.
Protection Features	Latched OVP/OTP shutdown (DIS pin), hiccup-mode OCP (ISEN >1.5 V), UVLO (Vcc = 8.7 V off / 13.5 V on), and leading-edge blanking (225 ns).

Availability

EVALSTSR30-60W is available at Aetrix Electronics and suitable for notebook adapter development, LCD TV auxiliary supply qualification, and energy-compliant consumer power supply prototyping requiring stable component supply and validated reference design support.

Supply support for EVALSTSR30-60W 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, specializing in power management, analog, microcontrollers, and automotive ICs with strong focus on energy-efficient system solutions.

The EVALSTSR30-60W belongs to ST's STSR (Smart Transformerless Switching Regulator) evaluation platform series, engineered to accelerate adoption of high-efficiency, low-noise, multi-mode AC-DC controllers for consumer and computing power applications.

FAQ

What input voltage range does EVALSTSR30-60W support?

The board is configured for universal AC input (90–264 V_AC) with bridge rectifier and bulk capacitor, delivering regulated 19 V DC output. Input stage uses standard NTC thermistor and X/Y safety capacitors per IEC 60950-1, and operates reliably from 45 Hz to 65 Hz line frequency without derating.

Can EVALSTSR30-60W be used with other controllers besides L6668?

No - the board is specifically laid out for the L6668 SO-16 package and its unique pin functions including HV start-up (pin 1), HVS isolation spacer (pin 2), PFC_STOP (pin 14), and S-COMP slope compensation (pin 15). Component values, routing clearances, and protection circuitry are optimized exclusively for L6668 timing, drive strength, and fault-handling behavior.

Does EVALSTSR30-60W include PFC circuitry?

No - it is a flyback-only evaluation board. The PFC_STOP signal (pin 14) is provided as an open-drain output to interface with external PFC controllers (e.g., L6563), but no boost converter stage or PFC components are mounted. Users must add a separate PFC module or reference design to enable active power factor correction.

How is light-load efficiency achieved on this board?

By leveraging L6668's native multi-mode control: frequency foldback reduces switching losses proportionally to load, while burst-mode disables switching entirely except for periodic short bursts maintaining regulation - combined with <2 mA quiescent current and high-voltage start-up, enabling <300 mW no-load input power per Energy Star requirements.

EVALSTSR30-60W Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Packaging:: Bulk

Product Status:: Obsolete

Main Purpose:: AC/DC, Primary and Secondary Side

Outputs and Type:: 1 Isolated Output

Voltage - Output:: 60 W

Current - Output:: 12V

Voltage - Input:: 5A

Regulator Topology:: 88 ~ 264 VAC

Frequency - Switching:: Flyback

Contents:: 68kHz

Utilized IC / Part:: Board(s)

Power - Output:: L6668, STSR30

EVALSTSR30-60W FAQ

1.How can I place an order for EVALSTSR30-60W through Aetrix?

Please submit a Request for Quotation (RFQ) for EVALSTSR30-60W 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 EVALSTSR30-60W reliable?

The price and inventory of EVALSTSR30-60W are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EVALSTSR30-60W is usually 5 days.

3.What payment methods are accepted for EVALSTSR30-60W?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EVALSTSR30-60W transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for EVALSTSR30-60W?

EVALSTSR30-60W orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your EVALSTSR30-60W 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 EVALSTSR30-60W?

For technical support, including EVALSTSR30-60W datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EVALSTSR30-60W requirements.

6.How does Aetrix verify that EVALSTSR30-60W is sourced from the original manufacturer or authorized distributors?

All EVALSTSR30-60W 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 EVALSTSR30-60W meets industry standards.

7.What is the process for return or replacement of EVALSTSR30-60W?

All EVALSTSR30-60W units undergo pre-shipment inspection (PSI). If there is an issue with EVALSTSR30-60W, 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 EVALSTSR30-60W part is unused and in its original packaging.

Return procedure for EVALSTSR30-60W:

1.Submit a request within 90 days.

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

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