My Inquiry
My Account
STMicroelectronics STEVAL-ISA140V1
- Part No.:
- STEVAL-ISA140V1
- Manufacturer:
- STMicroelectronics
- Package:
- Datasheet:
-
STEVAL-ISA140V1.pdf
- Description:
- EVAL BOARD FOR VIPER37
- Quantity:
- Payment:
- Shipping:
Inventory:1,462
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STEVAL-ISA140V1 from STMicroelectronics is a 15 W isolated flyback evaluation board based on the VIPer37HE primary-side controller IC, designed for auxiliary power supply applications in industrial and consumer systems. It accepts universal AC input (100–265 VAC, 50/60 Hz), delivers 12 V at 1.25 A with ≤50 mV ripple, achieves 78% active-mode efficiency, and consumes only 50 mW in standby at 230 VAC.
For engineers reviewing the STEVAL-ISA140V1 datasheet, STEVAL-ISA140V1 schematic, STEVAL-ISA140V1 application, or STEVAL-ISA140V1 equivalent, this board serves as a validated reference design for compact, RoHS-compliant, low-noise isolated DC-DC conversion in space-constrained auxiliary rail implementations.
Technical Context
The board implements a primary-side regulated, optocoupler-feedback isolated flyback topology using the VIPer37HE - an integrated high-voltage converter with embedded 730 V avalanche-rugged MOSFET and current-mode PWM controller. It operates in discontinuous conduction mode (DCM) with fixed 60 kHz switching frequency and built-in protections including overvoltage, overtemperature, and output short-circuit latch-off.
Transformer T1 is custom-wound (1 mH primary inductance, 3.3 µH secondary leakage inductance) to minimize size while meeting EN 55022 Class B conducted EMI limits. The SFH610A-2 optocoupler enables precise secondary-side voltage regulation via feedback to the VIPer37HE's FB pin, ensuring ±3% output voltage accuracy across line and load variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 100–265 VAC, 50/60 Hz - supports global mains without manual selection or external switching. |
| Output Voltage / Current | 12 V ±3%, 1.25 A - stable auxiliary rail for microcontrollers, sensors, or gate drivers. |
| Output Ripple | ≤50 mV peak-to-peak - meets noise-sensitive analog and digital logic supply requirements. |
| Efficiency | 78% at full load - reduces thermal stress and improves system-level energy compliance. |
| Standby Power | 50 mW @ 230 VAC - satisfies EU CoC Tier 2 and Energy Star Level VI standby consumption limits. |
| Ambient Operating Temp | Up to 60 °C - validated for enclosed industrial enclosures without forced airflow. |
Availability
STEVAL-ISA140V1 is available at Aetrix Electronics and suitable for industrial PLCs, smart metering front-ends, HVAC control modules, and IoT gateway auxiliary power designs requiring stable component supply and rapid prototyping validation.
Supply support for STEVAL-ISA140V1 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 microcontrollers, power ICs, sensors, and analog/mixed-signal devices for automotive, industrial, and consumer markets.
This evaluation board belongs to ST's STEVAL (ST Evaluation) series - purpose-built reference designs that demonstrate real-world implementation of ST's power ICs, enabling faster design-in and regulatory compliance verification.
FAQ
What is the primary function of the STEVAL-ISA140V1?
The STEVAL-ISA140V1 is a fully assembled, tested evaluation board implementing an isolated 15 W flyback converter. Its primary function is to serve as a hardware reference for designing compact, efficient auxiliary power supplies using the VIPer37HE controller - not as a standalone production module but as a design validation and test platform.
Does the board include safety certifications?
No, the STEVAL-ISA140V1 itself is not certified to UL/IEC/EN safety standards. However, its layout, transformer construction, creepage/clearance distances (>6 mm primary-secondary), and component selection comply with IEC 62368-1 and EN 60950-1 requirements, enabling straightforward certification of end-product derivatives.
Can the output voltage be adjusted?
Yes, the output voltage is set by the resistor divider (R9/R10) feeding the optocoupler's LED side. Adjusting R9 (82 kΩ) or R10 (130 kΩ) changes the feedback ratio, allowing reconfiguration to other standard outputs such as 5 V or 15 V - provided transformer turns ratio and output capacitor ratings remain appropriate.
Is a bill of materials (BOM) provided with the board?
Yes, the official data brief (DocID025733) includes a complete, manufacturer-verified BOM listing all components, including the custom transformer T1 part number (STTH1L06A, BAT41ZFILM, SFH610A-2, TS432), with supplier references and footprint details for replication and customization.
STEVAL-ISA140V1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- VIPER™
- Packaging:
- Box
- Product Status:
- Active
- Main Purpose:
- AC/DC, Primary Side
- Outputs and Type:
- 1 Isolated Output
- Voltage - Output:
- 15 W
- Current - Output:
- 12V
- Voltage - Input:
- 1.25A
- Regulator Topology:
- 100 ~ 265 VAC
- Frequency - Switching:
- -
- Contents:
- -
- Utilized IC / Part:
- Board(s)
- Power - Output:
- VIPer37
STEVAL-ISA140V1 FAQ
1.How can I place an order for STEVAL-ISA140V1 through Aetrix?
Please submit a Request for Quotation (RFQ) for STEVAL-ISA140V1 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 STEVAL-ISA140V1 reliable?
The price and inventory of STEVAL-ISA140V1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STEVAL-ISA140V1 is usually 5 days.
3.What payment methods are accepted for STEVAL-ISA140V1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STEVAL-ISA140V1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STEVAL-ISA140V1?
STEVAL-ISA140V1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STEVAL-ISA140V1 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 STEVAL-ISA140V1?
For technical support, including STEVAL-ISA140V1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STEVAL-ISA140V1 requirements.
6.How does Aetrix verify that STEVAL-ISA140V1 is sourced from the original manufacturer or authorized distributors?
All STEVAL-ISA140V1 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 STEVAL-ISA140V1 meets industry standards.
7.What is the process for return or replacement of STEVAL-ISA140V1?
All STEVAL-ISA140V1 units undergo pre-shipment inspection (PSI). If there is an issue with STEVAL-ISA140V1, 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 STEVAL-ISA140V1 part is unused and in its original packaging.
Return procedure for STEVAL-ISA140V1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STEVAL-ISA140V1 Tags
-
DFR0571
DFRobot
-
DFR0379
DFRobot
-
DFR0205
DFRobot
-
1385
Adafruit Industries LLC
-
COM-15208
SparkFun Electronics
-
1944
Adafruit Industries LLC
-
2465
Adafruit Industries LLC
-
DC2468A
Analog Devices Inc.
-
DC2841A
Analog Devices Inc.
-
TPS552892EVM-111
Texas Instruments
-
TPS55289EVM-093
Texas Instruments
-
EPC9158
EPC
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
