UC3864N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics:
  • High voltage, high current power supply controller
  • Designed for use in offline and DC-to-DC converter applications
  • Provides precise control of power supply parameters
• Package: DIP-16 (Dual In-line Package with 16 pins)
• Essence: Power supply controller IC
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Input Voltage Range: 10V to 30V
• Output Voltage Range: 5V to 24V
• Maximum Output Current: 2A
• Operating Temperature Range: -40°C to +85°C
• Supply Voltage: 5V to 30V
• Quiescent Current: 10mA

Detailed Pin Configuration

1. VCC: Supply voltage input
2. GND: Ground reference
3. COMP: Compensation pin for feedback loop
4. FB: Feedback pin for output voltage regulation
5. CS: Current sense input
6. RT/CT: Timing components connection
7. CT: Timing capacitor connection
8. RT: Timing resistor connection
9. OSC: Oscillator timing capacitor connection
10. OSC: Oscillator timing resistor connection
11. SYNC: Synchronization input
12. SS: Soft-start capacitor connection
13. OUT: Output voltage
14. NC: No connection
15. NC: No connection
16. NC: No connection

Functional Features

• Precise control of output voltage and current
• Overvoltage protection
• Undervoltage lockout
• Soft-start function for smooth power-up
• Adjustable frequency operation
• Synchronization capability for multi-phase operation
• Current sense and feedback loop for accurate regulation

Advantages and Disadvantages

Advantages: - High voltage and current handling capability - Wide input and output voltage range - Comprehensive protection features - Adjustable frequency operation for flexibility - Synchronization capability for multi-phase applications

Disadvantages: - Limited maximum output current (2A) - Requires external timing components for operation - DIP package may not be suitable for space-constrained designs

Working Principles

The UC3864N is a power supply controller IC that operates by regulating the output voltage and current of a power supply. It achieves this through a feedback loop that compares the actual output voltage with a reference voltage and adjusts the control signals accordingly. The IC also incorporates various protection features to ensure safe operation, such as overvoltage protection and undervoltage lockout.

The device utilizes an adjustable frequency oscillator to control the switching of the power supply, allowing for efficient power conversion. It also offers synchronization capability, enabling multiple UC3864N controllers to operate in a synchronized manner for multi-phase power supply applications.

Detailed Application Field Plans

The UC3864N is commonly used in offline and DC-to-DC converter applications where precise control of power supply parameters is required. Some specific application fields include:

1. Power adapters and chargers
2. Industrial power supplies
3. LED lighting systems
4. Telecom and networking equipment
5. Automotive electronics

Detailed and Complete Alternative Models

1. UC3844N: Similar power supply controller IC with slightly different specifications and pin configuration.
2. UC3842N: Another alternative with similar functionality but different package type (DIP-8).
3. UC3875N: Higher current handling capability and additional features compared to UC3864N.
4. UC3825N: Suitable for high-power applications with higher voltage and current ratings.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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