Fixed Input Push-pull Control Chip SCM1212A, Integrating Three Key Technologies

Mornsun SCM1212A

Mornsun’s newest fixed input push-pull control chip SCM1212A integrates soft-start function, output short-circuit protection and over-temperature protection to effectively improve product reliability. SCM1212A (SOT23-5 package) is functionally the same as the SCM1201A (SOT23-6 package) except the package, so the chip meets the market's demand for different pin packages.

Mornsun - SCM1212A

SCM1212A has geminate power MOS, and it can work normally at a low input voltage of 4.5 V and will not be damaged under the impact of a high input voltage of 40 V. The internal power MOS has a high symmetry driving, thereby reducing the degree of bias of the push-pull topology.

SCM1201A Block Diagram
SCM1201A Block Diagram.

The detailed information for three key technologies at below:

  • Soft-start Function.
    It avoid the damage caused by high current during start up and ensure normal startup with full load under CC load mode.
     
  • Output short-circuit protection.
    This protection has good consistency, and it is not affected by the parameter deviation during power processing, nor by the high and low temperature test conditions.
     
  • Over-temperature protection.
    When it exceeds the specified temperature range, the chip automatically enters the sleep state, and it can resume automatically when the temperature drops to the set value again.
SCM1201A Simplified Wiring Diagram
SCM1201A Simplified Wiring Diagram.

Product Application

It can be widely used in isolated power supply, industrial process control, isolated communication power, medical equipment, telecommunications equipment and other fields.

Output Voltage and Efficiency vs Output Current
Output Voltage and Efficiency vs Output Current.

Product Feature

  • 4.5~8 V input voltage range
  • Built-in geminate power MOS
  • High MOS symmetry driving
  • Built-in soft-start
  • Output short-circuit protection
  • Over-temperature protection
  • Operation junction temperature: –40~+125 °C
  • Providing matched transformer (recommend TTB05xx-1T series)
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