UC3846N DC switching regulator controller IC DIP16

UC3846N DC Switching Regulator Controller IC (DIP-16) delivers precise current-mode control for DC-DC converters. Designers use it in forward, push-pull, and half-bridge power supplies where accuracy, fast response, and protection features are critical.

Key Features:

• Current-Mode PWM Control: Provides cycle-by-cycle current limiting for reliable protection.
• High-Speed Error Amplifier: Maintains stable regulation with fast transient response.
• Dual Outputs: Supports push-pull, forward, and half-bridge topologies.
• UVLO Protection: Ensures safe startup and shutdown under undervoltage conditions.
• Synchronization Capability: Allows multiple controllers to run in sync.
• Wide Operating Range: Optimized for DC switching regulators in industrial and consumer applications.

Technical Specifications:

• Supply Voltage (V_CC): 8 V to 40 V
• Reference Voltage: 5.0 V ±1% precision reference output
• Oscillator Frequency: Adjustable up to 500 kHz
• Output Current Drive: ±1 A peak (totem-pole outputs)
• UVLO Thresholds: ~7.9 V turn-on, ~7.6 V turn-off
• Operating Temperature: 0 °C to +70 °C (commercial range)
• Package Type: DIP-16 through-hole

Mechanical Specifications:

• Package: DIP-16 dual in-line, 0.1 inch lead spacing
• Material: Epoxy molded plastic body
• Lead Finish: Tin-plated for solder reliability
• Mounting: Standard through-hole PCB mounting

Dimensions:

• Body Length: ~19.3 mm
• Body Width: ~7.5 mm
• Body Height: ~4.6 mm
• Lead Pitch: 2.54 mm (0.1 inch)
• Total Pin Count: 16 pins (DIP format)

Pinout and Wiring:

• Pin 1: Compensation (COMP)
• Pin 2: Current Sense (ISENSE)
• Pin 3: Ramp Generator (RAMP)
• Pin 4: Timing Capacitor (CT)
• Pin 5: Timing Resistor (RT)
• Pin 6: Ground (GND)
• Pin 7: Output A
• Pin 8: Output B
• Pin 9: VCC (Power Supply)
• Pin 10: VREF (5 V Reference Output)
• Pin 11–16: Additional control and feedback pins (consult datasheet for full mapping)

Datasheet Reference:

• Access the official UC3846N datasheet from Texas Instruments or other authorized vendors for full specifications, timing diagrams, and application notes.

Applications:

• DC-DC Converters: Used in isolated and non-isolated regulator designs.
• Switch-Mode Power Supplies (SMPS): Powers industrial, telecom, and consumer devices.
• Motor Control: Provides regulated drive in small DC motor controllers.
• UPS and Battery Chargers: Ensures reliable charging and backup power regulation.

Equivalent Models:

• UC3844: Current-mode PWM controller with different frequency range
• UC3845: Low-power variant with higher operating frequency
• SG3525: Alternative PWM controller with similar features

Package Includes:

• 1 x UC3846N DC Switching Regulator Controller IC (DIP-16)