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UC3842AN Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
UC3842ANMOTO/UC291Yes

UC3842AN is a high-performance current-mode PWM controller manufactured by Texas Instruments (TEXAS).

The UC3842AN is a high-performance current-mode PWM controller manufactured by Texas Instruments (TEXAS). Below are its key specifications, descriptions, and features:

Specifications:

  • Input Voltage (VCC): 16V (typical)
  • Output Current (Peak): ±1A
  • Operating Frequency: Up to 500kHz
  • Duty Cycle Range: 0% to 100%
  • Reference Voltage (VREF): 5V ±1%
  • Error Amp Bandwidth: 1MHz
  • Start-Up Current: <1mA
  • UVLO (Undervoltage Lockout): On: 16V (typ), Off: 10V (typ)
  • Package: 8-Pin DIP (Dual In-line Package)

Descriptions:

  • The UC3842AN is a fixed-frequency pulse-width modulation (PWM) controller optimized for DC-DC converter applications.
  • It operates in current-mode control, providing improved loop response and simplified compensation.
  • Includes a trimmed oscillator, precision reference, high-gain error amplifier, current sensing comparator, and a totem-pole output driver.

Features:

  • Current-Mode Operation: Enhances line and load regulation.
  • Automatic Feed-Forward Compensation: Simplifies feedback loop design.
  • Pulse-by-Pulse Current Limiting: Protects against overcurrent conditions.
  • Undervoltage Lockout (UVLO): Ensures proper start-up and shutdown.
  • Trimmed Oscillator: Precise frequency control.
  • High-Current Totem-Pole Output: Directly drives power MOSFETs.
  • Low Start-Up and Operating Current: Improves efficiency.

The UC3842AN is widely used in offline and DC-DC power supplies, battery chargers, and SMPS (Switched-Mode Power Supply) applications.

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