UCC3808ADTR-1

Product Overview

Category

UCC3808ADTR-1 belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power management applications.

Characteristics

• Low-power current mode PWM controller
• Wide input voltage range
• Adjustable frequency and maximum duty cycle
• Integrated soft-start function
• Overcurrent protection
• Undervoltage lockout
• Error amplifier with precise reference

Package

UCC3808ADTR-1 is available in a small surface-mount SOIC-8 package.

Essence

The essence of UCC3808ADTR-1 lies in its ability to efficiently regulate power in various electronic devices.

Packaging/Quantity

UCC3808ADTR-1 is typically packaged in reels, containing 2500 units per reel.

Specifications

• Input Voltage Range: 4.5V to 12V
• Output Voltage Range: 0.8V to VCC
• Maximum Duty Cycle: 100%
• Frequency Range: 50kHz to 1MHz
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

1. COMP: Compensation pin for error amplifier
2. CS: Current sense input for overcurrent protection
3. RT/CT: Timing resistor/capacitor connection for frequency control
4. GND: Ground reference
5. VREF: Reference voltage output
6. VCC: Power supply input
7. OUT: PWM output
8. SS/TR: Soft-start/timing capacitor connection

Functional Features

• Current Mode Control: UCC3808ADTR-1 utilizes current mode control to provide stable and efficient power regulation.
• Adjustable Frequency: The frequency of operation can be adjusted using external timing components connected to the RT/CT pin.
• Soft-Start Function: Integrated soft-start feature ensures a controlled startup, reducing stress on the power supply and load components.
• Overcurrent Protection: The CS pin allows for current sensing, enabling overcurrent protection to safeguard against excessive load currents.
• Undervoltage Lockout: UCC3808ADTR-1 incorporates undervoltage lockout circuitry to prevent operation below a specified voltage threshold.

Advantages and Disadvantages

Advantages

• Low-power consumption
• Wide input voltage range
• Adjustable frequency and duty cycle
• Integrated protection features
• Compact package size

Disadvantages

• Limited output voltage range
• Requires external timing components for frequency control

Working Principles

UCC3808ADTR-1 operates based on the principle of current mode control. It compares the sensed current through the CS pin with a reference voltage generated by the error amplifier. By adjusting the duty cycle of the PWM output, it regulates the power delivered to the load. The integrated soft-start function ensures a gradual increase in power during startup, preventing sudden voltage spikes.

Detailed Application Field Plans

UCC3808ADTR-1 finds applications in various fields, including: 1. Switching power supplies 2. Battery chargers 3. LED lighting systems 4. Motor control circuits 5. DC-DC converters

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to UCC3808ADTR-1 are: 1. LM2576-ADJ 2. LT1073 3. MC34063A 4. UC3843 5. TPS5430

These models offer similar functionality and can be used as substitutes depending on specific requirements.

In conclusion, UCC3808ADTR-1 is a low-power current mode PWM controller widely used in power management applications. Its adjustable frequency, integrated protection features, and compact package make it suitable for various electronic devices. However, it has limitations in terms of output voltage range and external timing component requirement.