UCC24636DBVR

Product Overview

Category: Integrated Circuit (IC)

Use: Voltage Mode PWM Controller

Characteristics: - Low-power, high-performance PWM controller - Designed for use in power supply applications - Provides precise regulation of output voltage - Offers protection features for enhanced reliability

Package: SOT-23-6 package

Essence: UCC24636DBVR is a voltage mode PWM controller that is widely used in power supply applications. It provides accurate regulation of the output voltage and offers various protection features to ensure reliable operation.

Packaging/Quantity: The UCC24636DBVR is typically sold in reels containing 3000 units per reel.

Specifications

• Input Voltage Range: 4.5V to 25V
• Output Voltage Range: 0.8V to 5.5V
• Operating Temperature Range: -40°C to 125°C
• Switching Frequency: 100kHz to 2MHz
• Maximum Duty Cycle: 90%
• Quiescent Current: 50µA

Pin Configuration

The UCC24636DBVR has a total of six pins arranged as follows:

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| | --| VREF | --| COMP | --| FB | --| GND | --| CS | --| VIN | |___________| ```

1. VREF: Reference voltage input pin.
2. COMP: Error amplifier compensation pin.
3. FB: Feedback voltage input pin.
4. GND: Ground pin.
5. CS: Current sense input pin.
6. VIN: Input voltage pin.

Functional Features

• Voltage mode control with adjustable frequency and duty cycle.
• Internal soft-start function for controlled startup.
• Overvoltage protection (OVP) and undervoltage lockout (UVLO) for enhanced safety.
• Cycle-by-cycle current limit protection.
• Thermal shutdown protection to prevent overheating.

Advantages and Disadvantages

Advantages: - Precise regulation of output voltage. - Wide input voltage range. - High switching frequency capability. - Comprehensive protection features. - Compact SOT-23-6 package for space-constrained applications.

Disadvantages: - Limited maximum duty cycle of 90%. - Requires external components for operation.

Working Principles

The UCC24636DBVR operates on the principle of voltage mode control. It compares the feedback voltage (FB) with a reference voltage (VREF) and adjusts the duty cycle of the PWM signal accordingly to regulate the output voltage. The error amplifier (COMP) provides compensation to ensure stability and accurate voltage regulation. The CS pin is used for current sensing, enabling cycle-by-cycle current limit protection.

Detailed Application Field Plans

The UCC24636DBVR is commonly used in various power supply applications, including but not limited to: - DC-DC converters - AC-DC converters - LED drivers - Battery chargers - Industrial power supplies

Its wide input voltage range, precise regulation, and comprehensive protection features make it suitable for a broad range of applications requiring efficient and reliable power conversion.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the UCC24636DBVR include: - LM2576-ADJ - LT1073 - TPS5430

These alternatives can be considered based on specific application requirements and availability.

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