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UC3843 Current Mode PWM Controller IC DIP-8 Package

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Description

The UC3843 is a high-performance PWM controller with current mode control. It includes an internal voltage reference, error amplifier, and other features necessary for stable and efficient power conversion. It is used to regulate and control switching regulators in power supply circuits.

Features

  • Current Mode Control: Implements current mode control for improved stability and performance in switching power supplies.
  • Internal Voltage Reference: Includes a stable 2.5V reference voltage for accurate feedback and regulation.
  • Error Amplifier: Integrated error amplifier to compare the output voltage with the reference voltage and adjust the PWM signal accordingly.
  • Oscillator: Features an internal oscillator with adjustable frequency, typically up to 100 kHz.
  • Soft-Start Function: Includes a soft-start feature to gradually increase the output voltage, reducing inrush current and improving startup performance.
  • Shutdown Capability: Provides a shutdown function to disable the PWM controller and reduce power consumption in standby mode.
  • High-Current Drive Capability: Capable of driving external transistors with high peak currents.

Specifications

  • Supply Voltage (Vcc): 7V to 30V
  • Oscillator Frequency: Adjustable, typically up to 100 kHz
  • Output Drive Current: Typically 1A peak
  • Internal Reference Voltage: 2.5V
  • Operating Temperature Range: -40°C to 85°C
  • Package Type: DIP-8 (Dual In-line Package with 8 pins)

Applications

  • DC-DC Converters: Used in designing buck, boost, and flyback converters for efficient voltage conversion.
  • Switch-Mode Power Supplies (SMPS): Implements current mode control for various SMPS designs, including computer power supplies and industrial power systems.
  • Battery Chargers: Provides control for battery charging circuits with current mode regulation.
  • Power Inverters: Applies to power inverter circuits for converting DC to AC power with efficient control.

Note

* Product Images are shown for illustrative purposes only and may differ from actual product

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