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UC3845L Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
UC3845LUTC21000Yes

UC3845L is a high-performance current-mode PWM controller manufactured by UTC (Unicorn Microelectronics).

The UC3845L is a high-performance current-mode PWM controller manufactured by UTC (Unicorn Microelectronics). Below are its key specifications, descriptions, and features:

Specifications:

  • Input Voltage (VCC): 8.5V to 30V
  • Operating Frequency: Up to 500kHz
  • Output Drive Current: ±1A (peak)
  • Duty Cycle Range: 0% to 100% (adjustable)
  • Reference Voltage (VREF): 5V (±1%)
  • Current Sense Comparator Threshold: 1V
  • Low Startup Current: <1mA
  • Operating Temperature Range: -40°C to +85°C
  • Package Options: DIP-8, SOIC-8

Descriptions:

The UC3845L is a fixed-frequency pulse-width modulation (PWM) controller designed for DC-DC converter and power supply applications. It operates in current-mode control, providing precise regulation and improved loop response. The device includes an oscillator, error amplifier, current sensing comparator, and a totem-pole output stage for driving power MOSFETs.

Features:

  • Current-Mode Control: Enhances loop stability and transient response.
  • Programmable Oscillator: Adjustable frequency via external timing components.
  • Under-Voltage Lockout (UVLO): Ensures proper startup and shutdown.
  • Cycle-by-Cycle Current Limiting: Protects against overloads.
  • Single-Ended Output: Directly drives power MOSFETs or IGBTs.
  • Low Power Consumption: Optimized for efficiency.
  • Internal Trimmed Bandgap Reference: Provides stable 5V reference.

This information is strictly factual and based on UTC's official specifications for the UC3845L.

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