Ultra-High Voltage Start-Up Controller For 40-5000V AC/DC Power Supply

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MORNSUN’s SCM9601A can be used in series-combination with SCM9602A to increase the input voltage even further covering a range from 40VDC up to 5,000VDC.

MORNSUN launched its ultra-high input voltage start-up controller SCM9601A and SCM9602A in SOT-23 package for AC/DC switching power supply. These ICs are well suited for applications such as photovoltaic industry, wind power, high voltage H-bridge.

The SCM9601A has a built-in 700V high voltage transistor that can operate with an input voltage from 40VDC up to 700VDC. The output is a constant charging current into the bypass capacitor of the switching power supply to start the controller chip. After the controller started up, the starter continues to deliver power for some time and increases the capacitive load capability of the power supply.

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The output is a constant charging current into the bypass capacitor of the switching power supply to start the controller chip. After the controller started up, the starter continues to deliver power for some time and increases the capacitive load capability of the power supply.

To avoid damage to the controller and the power system, the SCM9601A can sense the appropriate fault protection mode if VDD bypass capacitor is too small or when the power supply output is in short circuit condition.

Key Features (for SCM9601A)

  • Ideal for applications requiring an ultra-wide input voltage range (40VDC to 5000VDC)
  • Low-cost design featuring large starting current in small physical package
  • Output short circuit sleep time that can be adjusted through the VDD bypass capacitance
  • Charging voltage limit of VDD

Key Features (for SCM9602A)

  • Ideal for applications requiring an ultra-wide input voltage range (40VDC to 5000VDC)
  • Low-cost design featuring large starting current in small physical package
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