UCC2813DTR-2

Product Overview

Category

UCC2813DTR-2 belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power management applications.

Characteristics

• UCC2813DTR-2 is a high-performance current-mode PWM controller.
• It operates with a fixed frequency and peak current mode control.
• The device features an internal oscillator, under-voltage lockout, and a precision reference.
• It offers excellent line and load regulation, as well as high efficiency.

Package

UCC2813DTR-2 is available in a small outline package (SOT-23-6).

Essence

The essence of UCC2813DTR-2 lies in its ability to regulate and control power efficiently in various applications.

Packaging/Quantity

UCC2813DTR-2 is typically packaged in reels, with 3000 units per reel.

Specifications

• Input Voltage Range: 7V to 25V
• Output Voltage Range: 0.8V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Switching Frequency: 100kHz to 1MHz
• Maximum Duty Cycle: 90%
• Quiescent Current: 2.5mA

Detailed Pin Configuration

UCC2813DTR-2 has six pins arranged as follows:

```

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| | --| VREF |-- --| COMP |-- --| FB |-- --| GND |-- --| RT/CT |-- |_______| ```

1. VREF: Reference voltage output pin.
2. COMP: Error amplifier output pin.
3. FB: Feedback input pin.
4. GND: Ground pin.
5. RT/CT: Timing resistor/capacitor connection pin.

Functional Features

• Current-mode control for improved stability and transient response.
• Internal oscillator with programmable frequency.
• Under-voltage lockout for protection against low input voltage conditions.
• Precision reference for accurate regulation.
• Soft-start function to reduce inrush current during startup.

Advantages and Disadvantages

Advantages

• High-performance current-mode PWM controller.
• Excellent line and load regulation.
• Wide input voltage range.
• Small package size.
• Efficient power management.

Disadvantages

• Limited output voltage range (0.8V to 5.5V).
• Requires external timing components (resistor and capacitor).

Working Principles

UCC2813DTR-2 operates based on the current-mode control technique. It compares the feedback voltage from the output with a reference voltage to generate an error signal. This error signal is then amplified and used to control the duty cycle of the PWM signal. By adjusting the duty cycle, the IC regulates the output voltage and maintains stable operation.

Detailed Application Field Plans

UCC2813DTR-2 finds applications in various power management systems, including: 1. Switching power supplies 2. DC-DC converters 3. Battery chargers 4. LED drivers 5. Industrial controls

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to UCC2813DTR-2 are: 1. UC3843: A popular PWM controller with similar features. 2. TL494: Another widely used PWM controller suitable for power management applications. 3. SG3525: A versatile PWM controller commonly used in switch-mode power supplies.

These alternative models offer comparable functionality and can be chosen based on specific requirements and availability.

In conclusion, UCC2813DTR-2 is a high-performance current-mode PWM controller used in power management applications. It offers excellent regulation, efficiency, and a wide input voltage range. However, it has a limited output voltage range and requires external timing components. The IC operates based on current-mode control and finds applications in various fields such as switching power supplies, DC-DC converters, battery chargers, LED drivers, and industrial controls. Alternative models like UC3843, TL494, and SG3525 can be considered as substitutes for UCC2813DTR-2.