ON Semiconductor
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UC2845BDR2G
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UC2845BDR2G

Product Overview

  • Category: Integrated Circuit
  • Use: Voltage Mode PWM Controller
  • Characteristics: High Performance, Flexible, Versatile
  • Package: SOIC-14
  • Essence: Regulating and controlling the output voltage of power supplies
  • Packaging/Quantity: Tape & Reel (2500 units per reel)

Specifications

  • Input Voltage: 7V to 35V
  • Output Voltage: Up to 90% Duty Cycle
  • Operating Temperature: -40°C to 85°C
  • Frequency Range: 100Hz to 500kHz
  • Output Current: 1A

Detailed Pin Configuration

  1. VREF
  2. COMP
  3. RT/CT
  4. GND
  5. OUTPUT
  6. CS
  7. SS/TR
  8. VCC
  9. FB
  10. INV
  11. SYNC
  12. RT/CT
  13. CT/RT
  14. VREF

Functional Features

  • Voltage Feed-Forward Compensation
  • Overcurrent Protection
  • Soft Start Capability
  • Error Amplifier with Low Output Impedance
  • Adjustable Deadtime Control

Advantages

  • Wide Input Voltage Range
  • High Efficiency
  • Precise Regulation
  • Flexible Frequency Range
  • Robust Overcurrent Protection

Disadvantages

  • Limited Output Current
  • Requires External Components for Full Functionality

Working Principles

The UC2845BDR2G is a voltage mode PWM controller designed to regulate the output voltage of power supplies. It operates by comparing a feedback voltage to a sawtooth waveform and adjusts the duty cycle of the output accordingly. This control method ensures stable and accurate regulation of the output voltage.

Detailed Application Field Plans

The UC2845BDR2G is widely used in various power supply applications including: - Switching Power Supplies - DC-DC Converters - LED Drivers - Battery Chargers - Inverters

Detailed and Complete Alternative Models

  • UC3845B: Higher Output Current Capability
  • TL494: Different Package Options
  • SG3525: Enhanced Precision and Stability

This comprehensive integrated circuit provides high performance and flexibility in regulating power supply voltages, making it an ideal choice for a wide range of applications.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de UC2845BDR2G en soluciones técnicas

  1. What is the maximum operating frequency of UC2845BDR2G?

    • The maximum operating frequency of UC2845BDR2G is typically 500 kHz.

  2. What is the input voltage range for UC2845BDR2G?

    • The input voltage range for UC2845BDR2G is 7V to 35V.

  3. Can UC2845BDR2G be used in flyback converter applications?

    • Yes, UC2845BDR2G is commonly used in flyback converter applications.

  4. What is the typical output current capability of UC2845BDR2G?

    • The typical output current capability of UC2845BDR2G is 1A.

  5. Does UC2845BDR2G have built-in overcurrent protection?

    • Yes, UC2845BDR2G features built-in overcurrent protection.

  6. What type of control method does UC2845BDR2G use?

    • UC2845BDR2G uses voltage mode control.

  7. Is UC2845BDR2G suitable for power factor correction (PFC) applications?

    • Yes, UC2845BDR2G is suitable for power factor correction (PFC) applications.

  8. What is the temperature range for UC2845BDR2G?

    • The temperature range for UC2845BDR2G is typically -40°C to 125°C.

  9. Can UC2845BDR2G be used in automotive applications?

    • Yes, UC2845BDR2G is suitable for automotive applications.

  10. Does UC2845BDR2G require an external oscillator?

    • Yes, UC2845BDR2G requires an external oscillator for operation.