UCC2807DTR-1

Product Overview

Category

UCC2807DTR-1 belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power management applications, specifically for controlling and regulating switch-mode power supplies.

Characteristics

• UCC2807DTR-1 is a high-performance pulse width modulation (PWM) controller.
• It operates at a fixed frequency and provides precise control over the duty cycle of the output waveform.
• The IC offers excellent line and load regulation, making it suitable for various power supply designs.
• It has built-in protection features such as overcurrent protection and thermal shutdown.

Package

UCC2807DTR-1 is available in a small outline package (SOP) with eight pins.

Essence

The essence of UCC2807DTR-1 lies in its ability to efficiently regulate and control the power output of switch-mode power supplies.

Packaging/Quantity

This IC is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 10V to 20V
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to 85°C
• Maximum Duty Cycle: 100%
• Frequency Range: 50kHz to 500kHz
• Supply Current: 5mA

Detailed Pin Configuration

1. COMP: Compensation pin for external compensation network.
2. RT/CT: Timing resistor/capacitor connection pin.
3. GND: Ground reference pin.
4. VREF: Reference voltage output pin.
5. VCC: Power supply input pin.
6. OUT: PWM output pin.
7. FB: Feedback input pin for regulating the output voltage.
8. CS: Current sense input pin.

Functional Features

• Precise PWM control with fixed frequency operation.
• Adjustable duty cycle for regulating the output voltage.
• Overcurrent protection to prevent damage to the power supply.
• Thermal shutdown feature for enhanced safety.
• External compensation network for stability optimization.

Advantages and Disadvantages

Advantages

• High-performance PWM controller for efficient power management.
• Excellent line and load regulation capabilities.
• Compact SOP package for space-constrained designs.
• Built-in protection features enhance system reliability.

Disadvantages

• Limited input voltage range (10V to 20V).
• Relatively low operating temperature range (-40°C to 85°C).

Working Principles

UCC2807DTR-1 operates based on the principle of pulse width modulation. It generates a square wave output with a fixed frequency, and the duty cycle of this waveform determines the average output voltage. By adjusting the duty cycle using external components connected to the RT/CT pin, the desired output voltage can be achieved. The feedback input (FB) compares the actual output voltage with a reference voltage (VREF), allowing the IC to regulate the output accurately. The CS pin senses the current flowing through the power supply, enabling overcurrent protection.

Detailed Application Field Plans

UCC2807DTR-1 finds extensive application in various power supply designs, including: - AC-DC converters - DC-DC converters - LED drivers - Battery chargers - Uninterruptible power supplies (UPS) - Industrial power systems

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to UCC2807DTR-1 are: - UC3843 - SG3525 - TL494 - IRS2153D

These alternatives provide comparable performance and can be used as substitutes depending on specific design requirements.

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