MAX5003
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MAX5003

High-Voltage PWM Power-Supply Controller

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warning : NOT RECOMMENDED FOR NEW DESIGNS tooltip
warning : NOT RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Features
  • Wide Input Range: 11V to 110V
  • Internal High-Voltage Startup Circuit
  • Externally Adjustable Settings
    • Output Switch Current Limit
    • Oscillator Frequency
    • Soft-Start
    • Undervoltage Lockout
    • Maximum Duty Cycle
  • Low External Component Count
  • External Frequency Synchronization
  • Primary or Secondary Regulation
  • Input Feed-Forward for Fast Line-Transient Response
  • Precision ±2.5% Reference over Rated Temperature Range
  • Thermal Shutdown
Additional Details
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The MAX5003 high-voltage switching power-supply controller has all the features and building blocks needed for a cost-effective flyback and forward voltage-mode control converter. This device can be used to design both isolated and nonisolated power supplies with multiple output voltages that operate from a wide range of voltage sources. It includes a high-voltage internal start-up circuit that operates from a wide 11V to 110V input range. The MAX5003 drives an external N-channel power MOSFET and has a current-sense pin that detects overcurrent conditions and turns off the power switch when the current-limit threshold is exceeded. The choice of external power MOSFET and other external components determines output voltage and power.

The MAX5003 offers some distinctive advantages: soft-start, undervoltage lockout, external frequency synchronization, and fast input voltage feed-forward. The device is designed to operate at up to 300kHz switching frequency. This allows use of miniature magnetic components and low-profile capacitors. Undervoltage lockout, soft-start, switching frequency, maximum duty cycle, and overcurrent protection limit are all adjustable using a minimum number of external components. In systems with multiple controllers, the MAX5003 can be externally synchronized to operate from a common system clock.

Warning: The MAX5003 is designed to operate with high voltages. Exercise caution.

The MAX5003 is available in 16-pin SO and QSOP packages. An evaluation kit (MAX5003EVKIT) is also available.

Applications

  • +42V Automobile Systems
  • High-Voltage Power Supply Modules
  • Industrial Power Supplies
  • ISDN Power Supplies
  • Telecommunication Power Supplies

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

MAX5003-50WEVKIT

Evaluation Kit for the MAX5003-50W

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MAX5003-50WEVKIT

Evaluation Kit for the MAX5003-50W

Evaluation Kit for the MAX5003-50W

Features and Benefits

  • +5V at 10A Output
  • ±36V to ±72V Input Voltage Range
  • 250kHz Switching Frequency
  • Fully Isolated Design with 1500V Isolation Built into the Transformer
  • Fully Assembled and Tested Board with Minimum PC Board Footprint
  • 0.3% typical Line and Load Regulation
  • 85% typical Efficiency at 25W

Product Detail

The MAX5003 50W forward converter evaluation kit (EV kit) provides a regulated +5V output voltage at currents up to 10A, when operated from a +36V to +72V input voltage range.

This EV kit is fully assembled and tested. The output voltage is preset to +5V. A single-transistor forward-converter topology with a reset winding is used for high output power and high efficiency. The use of an optocoupler in the feedback circuit provides full 1500V primary to secondary galvanic isolation. A bottom-mounted heatsink plate safely dissipates the heat generated by the power MOSFET and the output diode. The power supply is designed to fit into a small footprint.

WARNING: Dangerous voltages are present on this EV kit and on equipment connected to it. Users who power-up this EV kit or power the sources connected to it must be careful to follow safety procedures appropriate to working with high-voltage electrical equipment.

Under severe fault or failure conditions, this EV kit may dissipate large amounts of power, which could result in the mechanical ejection of a component or of component debris at high velocity. Operate this EV kit with care to avoid possible personal injury.

Applications

  • +42V Automobile Systems
  • High-Voltage Power Supply Modules
  • Industrial Power Supplies
  • ISDN Power Supplies
  • Telecommunication Power Supplies

MAX5003EVKIT

Evaluation Kit for the MAX5003

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MAX5003EVKIT

Evaluation Kit for the MAX5003

Evaluation Kit for the MAX5003

Features and Benefits

  • 5V at 1A Output
  • +36V to +72V Input Voltage Range
  • 300kHz Switching Frequency
  • Can be Configured for -48V Input and +5V Output
  • Selectable Isolated or Nonisolated Operation
  • Proven PC Board Layout
  • Fully Assembled and Tested Surface-Mount Board

Product Detail

The MAX5003 evaluation kit (EV kit) provides a regulated 5V output voltage up to 1A while operating from a +36V to +72V input voltage.

The MAX5003 EV kit is a fully assembled and tested surface-mount printed circuit (PC) board. It comes with the output voltage set to 5V. This EV kit is configured as a flyback converter, and can easily be configured for either isolated or nonisolated operation by selecting the state of a mechanical switch. Additionally, for systems in which the input and output ground references are not at the same potential and for which isolation is not desired, the user has the option to install a level-shifter (not supplied) in the controller feedback loop.

WARNING: Dangerous voltages are present on this EV kit and on equipment connected to it. Users who power up this EV kit or power the sources connected to it must be careful to follow safety procedures appropriate to working with high-voltage electrical equipment.

Under severe fault or failure conditions, this EV kit may dissipate large amounts of power, which could result in the mechanical ejection of a component or of component debris at high velocity. Operate this kit with care to avoid possible personal injury.

Applications

  • +42V Automobile Systems
  • High-Voltage Power Supply Modules
  • Industrial Power Supplies
  • ISDN Power Supplies
  • Telecommunication Power Supplies

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