MAX256

PRODUCTION

3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies

Data Sheet (Rev. 2)
Part Models
4
1ku List Price
Starting From $4.16
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  • Part Details
  • Documentation
  • Hardware Ecosystem
  • Reference Designs
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    Part Details

    • 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
    MAX256
    3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies
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    Documentation

    Data Sheet 1

    Reliability Data 1

    User Guide 5

    Design Note 1

    Learn More

    Hardware Ecosystem

    Parts Product Life Cycle Description
    Interface Transceivers & Isolators 4
    MAX13085E
    		PRODUCTION +5.0V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485 Transceiver
    MAX13082E
    		PRODUCTION +5.0V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485 Transceivers
    MAX3072E
    		PRODUCTION +3.3V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers
    MAX3075E
    		PRODUCTION +3.3V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers
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    Reference Designs

    MAXREFDES4
    MAXREFDES4
    This 16-bit high-accuracy industrial analog input design accepts a 4–20mA current loop or a 0.2V to 4.096V voltage signal as input and provides a digital SPI output. The data path and power is fully isolated.
    MAXREFDES4 (Campbell) Circuits from the lab

    16-Bit High-Accuracy 4-20mA Input Isolated Analog Front End (AFE)

    View Detailed Reference Design

    Features and Benefits

    • High accuracy
    • 4–20mA current loop input
    • 0.2V to 4.096V input range
    • Isolated power and data
    • Small printed circuit board (PCB) area
    • Device drivers
    • Example C source code
    • Pmod™-compatible form factor
    maxrefdes5fig00
    maxrefdes5fig00
    maxrefdes5fig01
    Santa Fe (MAXREFDES5) Circuits from the lab

    16-Bit High Accuracy Multi-Input Isolated Analog Front End (AFE)

    View Detailed Reference Design

    Features and Benefits

    • High accuracy
    • ±10V, 0 to 10V, and 4–20mA Inputs
    • Isolated power and data
    • Small printed circuit board (PCB) area
    • Device drivers
    • Example C source code
    • Pmod™-compatible form factor

    MAXREFDES11 - Block Diagram
    MAXREFDES11 - Block Diagram
    MAXREFDES11
    MAXREFDES11 (Fresno) Circuits from the lab

    16-Bit High-Accuracy 0 to 10V Input Isolated Analog Front End (AFE)

    View Detailed Reference Design

    Features and Benefits

    • High accuracy
    • 0 to 10V input range
    • Isolated power and data
    • Small printed circuit board (PCB) area
    • Device drivers
    • Example C source code
    • Pmod™-compatible form factor
    MAXREFDES8 - Design Block Diagram
    MAXREFDES8 - Design Block Diagram
    MAXREFDES8
    MAXREFDES8 (Riverside) Circuits from the lab

    3.3V Input, 12V (15V) Output Isolated Power Supply

    View Detailed Reference Design

    Features and Benefits

    Features

    • Isolated power
    • 12V (15V) output
    • Small printed circuit board (PCB) area
    • Pmod™-compatible form factor

    Applications

    • Industrial sensors
    • Process control
    • Industrial automation
    • Medical
    MAXREFDES4 (Campbell)
    16-Bit High-Accuracy 4-20mA Input Isolated Analog Front End (AFE)
    Santa Fe (MAXREFDES5)
    16-Bit High Accuracy Multi-Input Isolated Analog Front End (AFE)
    Lakewood (MAXREFDES7)
    3.3V Input, ±12V (±15V) Output Isolated Power Supply
    MAXREFDES11 (Fresno)
    16-Bit High-Accuracy 0 to 10V Input Isolated Analog Front End (AFE)
    MAXREFDES8 (Riverside)
    3.3V Input, 12V (15V) Output Isolated Power Supply

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