Professional IC Distribution & Technical Solutions

The UC3842AL is a high-performance current-mode PWM controller manufactured by Unisonic Technologies (UTC). Below are its specifications, descriptions, and features:

Specifications:

• Manufacturer: Unisonic Technologies (UTC)
• Type: Current-Mode PWM Controller
• Operating Voltage Range: 8V to 30V
• Output Drive Current: ±1A (Peak)
• Switching Frequency: Up to 500kHz
• Duty Cycle Range: 0% to 100%
• Reference Voltage: 5V (±1% Tolerance)
• Low Startup Current: <1mA
• Operating Temperature Range: -25°C to +85°C
• Package: 8-Pin DIP or SOIC

Descriptions:

The UC3842AL is a fixed-frequency PWM controller designed for DC-DC converter and offline power supply applications. It features current-mode control for improved loop response and includes built-in protections such as under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a latch for single-pulse metering.

Features:

• Current-Mode Operation for precise control
• Automatic Feed-Forward Compensation
• Latching PWM for cycle-by-cycle current limiting
• Undervoltage Lockout (UVLO) with hysteresis
• High-Current Totem Pole Output (±1A peak)
• Internal Trimmed Bandgap Reference (5V ±1%)
• Low Startup and Operating Current
• Compatible with Voltage- or Current-Mode Topologies

The UC3842AL is commonly used in switch-mode power supplies (SMPS), battery chargers, and DC-DC converters. Its robust design ensures reliable performance in various power management applications.

(Note: Always refer to the latest UTC datasheet for detailed specifications and application guidelines.)