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UC2843AN Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
UC2843ANON400Yes

UC2843AN is a high-performance current-mode PWM controller manufactured by Texas Instruments (formerly Unitrode).

The UC2843AN is a high-performance current-mode PWM controller manufactured by Texas Instruments (formerly Unitrode). Below are its specifications, descriptions, and features:

Specifications:

  • Topology: Current-mode PWM controller
  • Operating Frequency: Up to 500 kHz
  • Input Voltage (VCC): 8.4V to 30V (start-up voltage: 16V typical)
  • Output Drive Current: ±1A (peak)
  • Duty Cycle Range: 0% to 100%
  • Reference Voltage: 5V (±1% tolerance)
  • Operating Temperature Range: -40°C to +85°C
  • Package: 8-Pin PDIP (Plastic Dual In-Line Package)

Descriptions:

  • The UC2843AN is designed for offline and DC-DC converter applications.
  • It provides precise duty cycle control with current-mode operation for improved loop response and simplified compensation.
  • Features include an undervoltage lockout (UVLO) with hysteresis, ensuring reliable start-up and shutdown.
  • Includes a built-in trimmed oscillator, error amplifier, and current-sensing comparator.

Features:

  • Current-Mode Operation: Enhances transient response and simplifies loop compensation.
  • Automatic Feed-Forward Compensation: Improves line regulation.
  • Undervoltage Lockout (UVLO): Ensures proper operation within specified voltage limits.
  • High-Current Totem Pole Output: Directly drives power MOSFETs.
  • Pulse-by-Pulse Current Limiting: Provides cycle-by-cycle protection.
  • Soft-Start Capability: Reduces stress during start-up.
  • Low Startup and Operating Current: Efficient power management.

The UC2843AN is commonly used in power supply designs, including flyback, forward, and boost converters.

(Note: Manufacturer is Texas Instruments, not "N/A.")

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