UC3825BDWTR

Product Overview

• Category: Integrated Circuit (IC)
• Use: PWM Controller
• Characteristics: High-performance, Current Mode
• Package: SOIC-16
• Essence: Regulates Pulse Width Modulation (PWM) signals
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage: 10V to 20V
• Output Voltage: 0V to VCC
• Operating Temperature: -40°C to +85°C
• Switching Frequency: 100kHz to 1MHz
• Duty Cycle Range: 0% to 100%
• Output Current: Up to 1A

Pin Configuration

The UC3825BDWTR has a total of 16 pins. The pin configuration is as follows:

1. COMP
2. CS
3. RT/CT
4. GND
5. VREF
6. VCC
7. OUT
8. SYNC
9. N/C
10. N/C
11. N/C
12. N/C
13. N/C
14. N/C
15. N/C
16. N/C

Functional Features

• Current mode control for improved stability and transient response.
• Adjustable switching frequency for flexibility in design.
• Soft-start function to reduce inrush current during startup.
• Overcurrent protection to safeguard the circuit from excessive currents.
• Error amplifier with high gain for precise voltage regulation.

Advantages and Disadvantages

Advantages

• High-performance PWM controller suitable for various applications.
• Wide input voltage range allows compatibility with different power sources.
• Robust design ensures reliable operation in harsh environments.
• Flexible duty cycle range enables efficient power conversion.
• Compact SOIC-16 package for space-constrained applications.

Disadvantages

• Limited output current capability may not be suitable for high-power applications.
• Lack of built-in protection features such as overvoltage or undervoltage protection.

Working Principles

The UC3825BDWTR is a current mode PWM controller that regulates the width of the output pulse based on the input voltage and control signals. It operates by comparing the feedback voltage with a reference voltage to generate an error signal. This error signal is then amplified and used to control the duty cycle of the output waveform, which in turn regulates the output voltage. The adjustable switching frequency allows optimization for different applications.

Detailed Application Field Plans

The UC3825BDWTR is commonly used in various power electronics applications, including:

1. Switching Power Supplies
2. DC-DC Converters
3. Motor Control Systems
4. LED Lighting Systems
5. Battery Chargers

Detailed and Complete Alternative Models

1. UC3825A: Similar functionality with extended temperature range (-55°C to +125°C).
2. UC3825B: Lower cost version with reduced features.
3. UC3825C: Enhanced version with additional protection features.

Note: Please refer to the manufacturer's datasheet for complete details and specifications of alternative models.

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