UC3842 - SMD/SMT Current Mode PWM Controller SMD-8 (SOIC-8) - LM3842 / TL3842

UC3842 SMD Current Mode PWM Controller - SOIC-8 (LM3842/TL3842 Compatible)

The UC3842 is a high-performance current-mode PWM controller. It is specifically designed for low- to medium-power switch-mode power supplies (SMPS). This integrated circuit comes in a compact SMD-8 (SOIC-8) surface-mount package. It provides precise duty cycle control for optimal power conversion. The UC3842 ensures fast response and high efficiency in various power applications. It is an excellent choice for flyback and forward converters. This controller also features robust protection mechanisms like Under-Voltage Lockout. Its low start-up current further enhances overall system efficiency. It's a reliable and widely used solution for modern power designs.

Specifications:

• Function: Current Mode PWM Controller
• Package: SMD-8 / SOIC-8
• Operating Voltage (VCC): 16V to 30V
• UVLO Thresholds: Turn-on: ~16V, Turn-off: ~10V
• Oscillator Frequency: Up to 500 kHz (typical use at 100 kHz)
• Reference Voltage: 5V ±1% (internal precision reference)
• Output Drive Capability: ±1A peak
• Start-Up Current: < 1 mA
• Operating Supply Current: ~11 mA
• RoHS Compliant: Yes

Key features and benefits:

• Current-Mode Control for enhanced line/load regulation and cycle-by-cycle current limiting.
• Fixed Frequency Oscillator, typically 100 kHz, suitable for compact power designs.
• Low Start-Up Current (<1mA) reduces input power requirements and supports efficient start-up.
• Optimized Under-Voltage Lockout (UVLO) for reliable operation (Turn-on: ~16V, Turn-off: ~10V).
• SMD-8 (SOIC-8) surface-mount package, ideal for automated PCB assembly.
• Integrates high-performance analog control circuitry for superior performance.
• Provides precise duty cycle control for high efficiency in power conversion.

Applications:

• Off-line Switch-Mode Power Supplies (SMPS) including flyback and forward converters.
• LED drivers and battery chargers requiring stable power control.
• DC-DC converters for various electronic systems.
• Standby power supplies for energy-efficient designs.
• Industrial and consumer power modules.

Package Includes:

*Image shown is a representation only.

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