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UC3843ADM Specifications

Detailed technical information and Application Scenarios

Product Details

PartNumberManufactorQuantityAvailability
UC3843ADMMICROSEMI1788Yes

UC3843ADM** is a current-mode PWM controller manufactured by **Microsemi** (formerly a part of Microchip Technology).

The UC3843ADM is a current-mode PWM controller manufactured by Microsemi (formerly a part of Microchip Technology). Below are its key specifications, descriptions, and features:

Specifications

  • Manufacturer: Microsemi
  • Type: Current-Mode PWM Controller
  • Topology: Flyback, Forward, Boost, Buck
  • Operating Frequency: Up to 500 kHz
  • Duty Cycle Range: 0% to 100%
  • Output Current: ±1A (Peak)
  • Input Voltage (VCC): 8.4V to 30V
  • UVLO (Undervoltage Lockout):
  • Startup: 8.4V (Typ)
  • Shutdown: 7.6V (Typ)
  • Reference Voltage: 5V (±1%)
  • Error Amplifier Gain Bandwidth: 1 MHz
  • Operating Temperature Range: -40°C to +85°C
  • Package: SOIC-8

Descriptions

The UC3843ADM is a fixed-frequency PWM controller optimized for high-performance DC-DC converters. It features current-mode control for improved transient response and simplified loop compensation. The device includes an onboard error amplifier, oscillator, PWM comparator, and a high-current totem-pole output driver.

Features

  • Current-Mode Operation for precise control
  • Automatic Feed-Forward Compensation
  • Latching PWM for cycle-by-cycle current limiting
  • Internal Trimmed Reference (5V ±1%)
  • Low Startup Current (<1mA)
  • High-Current Totem-Pole Output (±1A peak)
  • Undervoltage Lockout (UVLO) with hysteresis
  • Adjustable Oscillator Frequency via external components

This information is strictly factual and based on the manufacturer's datasheet.

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