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L4990 Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
L4990ST100Yes

Certainly!

Certainly! Here is the factual information about the L4990 manufactured by STMicroelectronics (STM):

Description:

The L4990 is a high-voltage monolithic switching regulator designed for off-line power supplies. It operates in current-mode PWM (Pulse Width Modulation) and is suitable for flyback, forward, and boost converter topologies.

Key Features:

  • Input Voltage Range: Up to 500V (suitable for offline applications).
  • Output Voltage: Adjustable via external components.
  • Switching Frequency: Up to 500 kHz (adjustable).
  • Current-Mode Control: Ensures stable operation and fast transient response.
  • Built-in Protections:
  • Overvoltage Protection (OVP)
  • Undervoltage Lockout (UVLO)
  • Overcurrent Protection (OCP)
  • Thermal Shutdown
  • Low Startup Current: Typically 150 µA, reducing power dissipation.
  • High Output Drive Capability: Directly drives a power MOSFET.
  • Package Options: Available in DIP-8 and SO-8 packages.

Applications:

  • AC/DC Converters
  • Flyback and Forward Converters
  • Auxiliary Power Supplies
  • Industrial and Consumer Power Systems

For detailed specifications, refer to the official STMicroelectronics datasheet for the L4990. Let me know if you need additional technical details.

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