New Content (1)
Overview
Features and Benefits
- Simple, Flexible Design Provides Up to 3W to the Transformer in Isolated Power Supplies
- Single Supply +5V or +3.3V Operation
- Internal Resistor-Programmable Oscillator Mode
- External Clock Mode with Watchdog
- Disable Mode
- Integrated System Protection
- Undervoltage Lockout
- Thermal Shutdown
- Saves Space on Board
- 8-Pin Thermally-Enhanced SO Package
Product Details
The MAX256 is an integrated primary-side controller and H-bridge driver for isolated power-supply circuits. The device contains an on-board oscillator, protection circuitry and internal FET drivers to provide up to 3W of power to the primary winding of a transformer. The MAX256 can be operated using the internal programmable oscillator or can be driven by an external clock for improved EMI performance. Regardless of the clock source being used, an internal flip-flop stage guarantees a fixed 50% duty cycle to prevent DC current flow in the transformer.
The MAX256 operates from a single-supply voltage of +5V or +3.3V, and includes undervoltage lockout for controlled startup. The device prevents cross-conduction of the H-bridge MOSFETs by implementing break-before-make switching. Thermal shutdown circuitry provides additional protection against damage due to overtemperature conditions.
The MAX256 is available in the 8-pin thermally-enhanced
SO package. The device is specified for the automotive
Applications
- Industrial Process Control
- Isolated Communications Links
- Isolated Power Supplies
- Medical Equipment
- Telecommunications
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
Documentation & Resources
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UG-5651: Campbell (MAXREFDES4#) ZedBoard Quick Start Guide5/20/2013
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UG-5630: Fresno (MAXREFDES11#) ZedBoard Quick Start Guide4/25/2013
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UG-5639: Santa Fe (MAXREFDES5#) ZedBoard Quick Start Guide4/22/2013
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UG-5578: Santa Fe (MAXREFDES5#) Nexys 3 Quick Start Guide2/4/2013
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UG-5579: Campbell (MAXREFDES4#) Nexys 3 Quick Start Guide2/4/2013
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Isolated Power Using Capacitors12/22/2010
Reference Designs (5)
Product Recommendations
MAX256 Companion Parts
Recommended Related Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
---|---|---|---|---|
MAX256ASA+ | Material Declaration | Reliability Data | 8-SOIC_N-150_MIL | |
MAX256ASA+T | Material Declaration | Reliability Data | 8-SOIC_N-150_MIL | |
MAX256ASA/V+ | Material Declaration | Reliability Data | 8-SOIC_N-150_MIL | |
MAX256ASA/V+T | Material Declaration | Reliability Data | 8-SOIC_N-150_MIL | |
Wafer Fabrication Data |
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.