UC 3842 B SMD PWM Controller – Current Mode Regulator for Switching Power Supplies

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⚙️ Technical description:
The UC3842B is a high-performance PWM controller for switching power supplies, designed for current-mode applications. This SO-8 SMD packaged IC offers precise oscillation with guaranteed frequencies up to 250 kHz and reduced-current operation, ideal for applications where efficiency and precise control are critical. Its totem-pole output allows direct driving of power MOSFETs in flyback, forward, and buck converter topologies. 💡 Highlighted features:

• Current mode PWM control up to 500 kHz
• Oscillator with precise frequency and automatic compensation
• High current totem pole output (±1A peak)
• Low power consumption at start-up: < 0.5 mA
• Internal 5V regulated and stable reference
• Undervoltage lockout (UVLO) protection with hysteresis
• Ideal for SMPS power supply control, motor drivers and industrial applications.

📦 Technical specifications:
• Operating voltage (V _DC ): 12 V to 25 V
• Reference voltage: 5.00 V ±2%
• Encapsulation: SO-8 (SMD)
• Output current: ±1 A peak
• Oscillation frequency: Up to 500 kHz
• Operating temperature: 0°C to +70°C
• UVLO protection: ON at 16 V / OFF at 10 V
🔌 Common applications:

• Switching power supplies (SMPS) and chargers
• Isolated and non-isolated DC-DC sources
• Controllers for brushless motors
• Industrial electronics and power equipment.
• 📄 View technical data sheet (PDF)

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