ALTAIR05T-800 5 W wide range CV-CC optoless adapter evaluation board

The STEVAL-ISA176V1 evaluation board implements a 5 W (5 V / 1 A) wide-range mains battery charger with constant voltage/constant current, tailored for AC-DC chargers for mobile phones and adapters or other hand-held equipment.

The core of the application is the ALTAIR05T-800, the first “all-primary sensing switching regulator” of the ALTAIR family.

The IC combines a high-performance, low-voltage PWM controller chip and an 800 V, avalanche-rugged power MOSFET in the same package.

The PWM chip is a quasi-resonant (QR) current mode controller IC specifically designed for QR ZVS (zero voltage switching at switch turn-on) flyback converters.

The device is capable of providing constant output voltage (CV) and constant output current (CC) regulation using primary-sensing feedback. This eliminates the need for the optocoupler, the secondary voltage reference and the current sensor, while still maintaining quite accurate regulation.

In addition, it is possible to compensate the voltage drop on the output cable to improve CV regulation on the externally accessible terminals.

Extremely low consumption under no load conditions is ensured thanks to controlled burst mode operation that, along with the built-in high voltage startup circuit and the low operating current of the device, helps minimize the residual input consumption. Although an auxiliary winding is required in the transformer to correctly perform CV/CC regulation, the chip can be powered directly from the rectified mains. This is useful particularly during CC regulation, where the flyback voltage is generated by the winding drops.

Key Features

  • Universal input mains range: 90 - 264 V AC, frequency 45-65 Hz
  • Output voltage: 5 V @ 1 A continuous operation
  • Optoless constant voltage - constant current output regulation
  • Standby mains consumption: < 100 mW @ 230 V AC
  • Average efficiency: >70%
  • EMI: in accordance with EN55022-Class-B
  • RoHS compliant

Image

×

Resources

Technical Documentation

Product Specifications
Description Version Size
ALTAIR05T-800 5 W wide range CV-CC optoless adapter evaluation board 1.0 248 KB
Application Notes
Description Version Size
ALTAIR05T-800 5 W wide range CV-CC optoless adapter evaluation board 2.2 2 MB

Hardware Resources

Board Manufacturing Specifications
Description Version Size
STEVAL-ISA176V1 gerber files 1.0 362 KB
Bill of Materials
Description Version Size
STEVAL-ISA176V1 BOM 1.0 74 KB
Schematic Pack
Description Version Size
STEVAL-ISA176V1 schematic 1.0 72 KB

Legal

License Agreement
Description Version Size
Evaluation products license agreement 1.4 128 KB
Support & Community

Sample & Buy

Part Number Core Product Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STEVAL-ISA176V1 ALTAIR05T-800 Active 55.13 1 NEC EAR99 ITALY MORE INFO Buy Direct Add to cart DISTRIBUTOR AVAILABILITY
test

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEVAL-ISA176V1 ActiveCARDIndustrialEcopack2
test

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

×