Microsemi Corporation
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SG2526N
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SG2526N

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Mode PWM Controller
  • Characteristics: High-performance, versatile, and reliable
  • Package: DIP-16 (Dual In-Line Package with 16 pins)
  • Essence: The SG2526N is a voltage mode pulse width modulation (PWM) controller designed for power supply applications.
  • Packaging/Quantity: Available in tubes or reels, with a quantity of 25 pieces per tube/reel.

Specifications

  • Input Voltage Range: 8V to 35V
  • Output Voltage Range: 0V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Switching Frequency: Adjustable up to 500kHz
  • Maximum Duty Cycle: 100%
  • Output Current: Up to 200mA
  • Error Amplifier Gain Bandwidth: 2MHz
  • Shutdown Current: 50µA (typical)

Detailed Pin Configuration

The SG2526N has a total of 16 pins. Here is the detailed pin configuration:

  1. COMP: Compensation Pin
  2. INV: Inverting Input of Error Amplifier
  3. NONINV: Non-Inverting Input of Error Amplifier
  4. VREF: Reference Voltage Input
  5. GND: Ground
  6. RT/CT: Timing Resistor/Capacitor Connection
  7. CT: Timing Capacitor Connection
  8. RT: Timing Resistor Connection
  9. OSC: Oscillator Output
  10. SYNC: Synchronization Input
  11. VCC: Positive Power Supply
  12. OUT: Output
  13. FB: Feedback Input
  14. CS: Current Sense Input
  15. SD: Shutdown Input
  16. NC: No Connection

Functional Features

  • Voltage mode control with adjustable switching frequency.
  • Error amplifier with high gain bandwidth for precise regulation.
  • Current sense input for accurate current limiting.
  • Synchronization input for multiple IC operation.
  • Shutdown input for power-saving mode.

Advantages and Disadvantages

Advantages: - High-performance PWM controller for power supply applications. - Versatile and reliable design. - Adjustable switching frequency allows optimization for different applications. - Accurate current limiting ensures protection against overcurrent conditions. - Synchronization capability enables parallel operation of multiple ICs.

Disadvantages: - Limited output current capacity (up to 200mA). - Requires external timing resistor and capacitor for frequency adjustment. - No internal oscillator, an external clock source is needed.

Working Principles

The SG2526N operates on the voltage mode control principle. It compares the feedback voltage from the output with a reference voltage to generate an error signal. This error signal is amplified and used to control the duty cycle of the PWM signal. By adjusting the duty cycle, the SG2526N regulates the output voltage or current of the power supply.

Detailed Application Field Plans

The SG2526N is commonly used in various power supply applications, including:

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

Detailed and Complete Alternative Models

Here are some alternative models that offer similar functionality to the SG2526N:

  1. SG3526N: Similar voltage mode PWM controller with additional features like soft-start and shutdown delay.
  2. UC3842: Current mode PWM controller with integrated oscillator and error amplifier.
  3. TL494: PWM controller with built-in error amplifier, oscillator, and multiple outputs.

These alternative models can be considered based on specific application requirements and desired features.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací SG2526N v technických řešeních

Sure! Here are 10 common questions and answers related to the application of SG2526N in technical solutions:

  1. Q: What is SG2526N? A: SG2526N is a voltage mode PWM controller IC used in power supply applications.

  2. Q: What are the key features of SG2526N? A: Some key features of SG2526N include adjustable frequency, soft-start capability, current limiting, and error amplifier.

  3. Q: How does SG2526N help in power supply designs? A: SG2526N provides control and regulation functions necessary for efficient power supply operation, such as generating PWM signals and managing feedback loops.

  4. Q: Can SG2526N be used in both buck and boost converter topologies? A: Yes, SG2526N can be used in both buck and boost converter topologies, as well as other voltage mode control applications.

  5. Q: What is the maximum operating frequency of SG2526N? A: The maximum operating frequency of SG2526N is typically around 500 kHz.

  6. Q: Does SG2526N have built-in protection features? A: Yes, SG2526N has built-in protection features like overcurrent protection and thermal shutdown to ensure safe operation.

  7. Q: Can SG2526N operate with wide input voltage ranges? A: Yes, SG2526N can operate with wide input voltage ranges, typically up to 40V.

  8. Q: How can I adjust the output voltage using SG2526N? A: You can adjust the output voltage by modifying the feedback resistors connected to the error amplifier inputs of SG2526N.

  9. Q: Is SG2526N suitable for high-power applications? A: Yes, SG2526N is suitable for high-power applications as it can handle high currents and voltages.

  10. Q: Are there any application notes or reference designs available for SG2526N? A: Yes, the manufacturer of SG2526N provides application notes and reference designs that can help in implementing the IC effectively in various technical solutions.

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