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UC3845 Current Mode PWM Controller IC DIP-8 Package

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5 In stock


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Description

The UC3845 is designed for high-performance current mode control in switching power supplies. It integrates an internal voltage reference, error amplifier, and other essential components for stable and efficient operation of DC-DC converters and similar power circuits.

Features

  • Current Mode Control: Utilizes current mode feedback for improved stability and performance in switching power supplies.
  • Internal Voltage Reference: Includes a 2.5V reference voltage for accurate feedback and regulation.
  • Error Amplifier: Features an integrated error amplifier for comparing the feedback voltage to the reference voltage.
  • Oscillator: Provides an internal oscillator with adjustable frequency, typically up to 100 kHz.
  • Soft-Start Function: Includes a soft-start feature to gradually ramp up the output voltage, reducing inrush current and stress on components.
  • Shutdown Capability: Allows for a shutdown mode to disable the controller and minimize power consumption.
  • High-Current Drive Capability: Can drive external transistors with high peak currents, suitable for high-power applications.

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: Ideal for designing buck, boost, and flyback converters to efficiently convert voltage levels.
  • Switch-Mode Power Supplies (SMPS): Used in various SMPS designs, including those for computers, industrial equipment, and consumer electronics.
  • Battery Chargers: Provides control for battery charging circuits with precise current mode regulation.
  • Power Inverters: Applied in circuits that convert DC to AC power with accurate control.

Note

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

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