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UC3825BN
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UC3825BN

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: PWM Controller
  • Characteristics: High-performance, Current Mode, Voltage Feedback
  • Package: DIP-16 (Dual In-Line Package with 16 pins)
  • Essence: Regulates Pulse Width Modulation (PWM) signals for power converters
  • Packaging/Quantity: Available in tubes of 25 units

Specifications

  • Input Voltage: 10V to 20V
  • Output Voltage: 0V to VCC
  • Operating Temperature: -40°C to +85°C
  • Switching Frequency: 100kHz to 1MHz
  • Maximum Duty Cycle: 50%
  • Output Current: 200mA

Pin Configuration

The UC3825BN IC has the following pin configuration:

  1. COMP
  2. RT/CT
  3. CS
  4. GND
  5. VREF
  6. VCC
  7. OUTA
  8. OUTB
  9. RT/CT
  10. CT/RT
  11. SYNC
  12. OSC
  13. UVLO
  14. FB
  15. INV
  16. VSENSE

Functional Features

  • Current mode control for improved stability and transient response
  • Voltage feedback loop for accurate regulation
  • Adjustable switching frequency for optimization
  • Synchronization input for multi-phase operation
  • Under-voltage lockout protection
  • Error amplifier for precise error detection and compensation

Advantages and Disadvantages

Advantages: - Excellent line and load regulation - Wide input voltage range - Robust protection features - Flexible frequency adjustment - Suitable for various power converter topologies

Disadvantages: - Limited maximum duty cycle - Requires external components for complete functionality - Not suitable for high-power applications

Working Principles

The UC3825BN is a current mode PWM controller that regulates the pulse width of the output signal based on the feedback received from the voltage reference and error amplifier. It compares the sensed current with the reference voltage to generate a control signal, which adjusts the duty cycle of the output waveform. This control mechanism ensures stable and efficient power conversion.

Detailed Application Field Plans

The UC3825BN is commonly used in various power converter applications, including:

  1. Switching Power Supplies
  2. DC-DC Converters
  3. AC-DC Converters
  4. LED Drivers
  5. Motor Control Circuits

Detailed and Complete Alternative Models

Some alternative models that can be considered as replacements for UC3825BN are:

  1. UC3842AN
  2. TL494CN
  3. SG3525AN
  4. IRS2153D
  5. LM5039MH

These alternatives offer similar functionality and can be used interchangeably depending on specific requirements.

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Maglista ng 10 karaniwang tanong at sagot na nauugnay sa aplikasyon ng UC3825BN sa mga teknikal na solusyon

Sure! Here are 10 common questions and answers related to the application of UC3825BN in technical solutions:

  1. Q: What is UC3825BN? A: UC3825BN is a pulse width modulation (PWM) controller IC commonly used in power supply applications.

  2. Q: What is the operating voltage range of UC3825BN? A: The operating voltage range of UC3825BN is typically between 8V and 35V.

  3. Q: Can UC3825BN be used in both buck and boost converter topologies? A: Yes, UC3825BN can be used in both buck and boost converter topologies, as well as other power conversion circuits.

  4. Q: What is the maximum switching frequency supported by UC3825BN? A: UC3825BN supports a maximum switching frequency of up to 1MHz.

  5. Q: Does UC3825BN have built-in protection features? A: Yes, UC3825BN has various built-in protection features such as overcurrent protection, overvoltage protection, and thermal shutdown.

  6. Q: Can UC3825BN drive high-power MOSFETs directly? A: No, UC3825BN requires an external driver circuit to drive high-power MOSFETs or IGBTs.

  7. Q: How many PWM outputs does UC3825BN have? A: UC3825BN has two complementary PWM outputs, which can be used for controlling power switches.

  8. Q: Is UC3825BN suitable for low-power applications? A: UC3825BN is more commonly used in medium to high-power applications due to its robustness and high switching frequency capability.

  9. Q: Can UC3825BN operate in a synchronized mode? A: Yes, UC3825BN can operate in a synchronized mode by connecting an external synchronization signal.

  10. Q: What are the typical applications of UC3825BN? A: UC3825BN is widely used in various power supply applications such as DC-DC converters, AC-DC converters, motor drives, and battery chargers.

Please note that these answers are general and may vary depending on specific design requirements and application scenarios.