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LT1172HVCQ#PBF
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LT1172HVCQ#PBF

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Regulator
  • Characteristics: High Voltage, Current Mode Control
  • Package: TO-220
  • Essence: Switching Regulator Controller
  • Packaging/Quantity: Tube/25 pieces

Specifications

  • Input Voltage Range: 3V to 60V
  • Output Voltage Range: Adjustable from 1.25V to 50V
  • Switching Frequency: Up to 500kHz
  • Maximum Duty Cycle: 90%
  • Operating Temperature Range: -40°C to 85°C
  • Output Current: Up to 2A

Pin Configuration

The LT1172HVCQ#PBF has the following pin configuration:

  1. GND: Ground
  2. VFB: Feedback Voltage Input
  3. COMP: Compensation Node
  4. SHDN: Shutdown Control
  5. VCC: Supply Voltage Input
  6. RT/CT: Timing Components Connection
  7. SYNC: Synchronization Input
  8. SW: Switch Node

Functional Features

  • Current Mode Control for improved stability and transient response.
  • Wide input voltage range allows for versatile applications.
  • Adjustable output voltage provides flexibility.
  • High switching frequency enables smaller external components.
  • Shutdown control for power-saving mode.
  • Synchronization input for multi-phase operation.

Advantages

  • Efficient voltage regulation with high accuracy.
  • Compact size due to high switching frequency.
  • Wide input voltage range accommodates various power sources.
  • Shutdown control helps conserve power.
  • Synchronization capability allows for parallel operation.

Disadvantages

  • Requires additional external components for complete voltage regulation circuit.
  • Higher complexity compared to linear regulators.
  • Sensitive to noise and requires proper filtering.

Working Principles

The LT1172HVCQ#PBF is a switching regulator controller that utilizes current mode control to regulate the output voltage. It operates by comparing the feedback voltage (VFB) with a reference voltage and adjusting the duty cycle of the internal switch accordingly. This control mechanism ensures stable and accurate voltage regulation.

When the input voltage exceeds the desired output voltage, the internal switch is turned off, allowing the inductor to store energy. Conversely, when the input voltage drops below the desired output voltage, the switch is turned on, releasing the stored energy from the inductor to the output. This continuous switching process maintains the desired output voltage.

Detailed Application Field Plans

The LT1172HVCQ#PBF is commonly used in various applications, including:

  1. Power supplies for industrial equipment.
  2. Automotive electronics.
  3. Telecommunications systems.
  4. Battery charging circuits.
  5. LED lighting systems.
  6. Portable electronic devices.

Detailed and Complete Alternative Models

  • LT1172HV: Similar specifications but different package (PDIP-8).
  • LT1170HV: Lower maximum duty cycle but higher output current capability.
  • LT1171HV: Higher switching frequency and wider operating temperature range.

These alternative models provide similar functionality and can be considered based on specific application requirements.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací LT1172HVCQ#PBF v technických řešeních

Sure! Here are 10 common questions and answers related to the application of LT1172HVCQ#PBF in technical solutions:

  1. Question: What is the LT1172HVCQ#PBF?
    Answer: The LT1172HVCQ#PBF is a high voltage, high efficiency switching regulator designed for use in various power supply applications.

  2. Question: What is the input voltage range of the LT1172HVCQ#PBF?
    Answer: The input voltage range of the LT1172HVCQ#PBF is typically between 3V and 60V.

  3. Question: What is the output voltage range of the LT1172HVCQ#PBF?
    Answer: The output voltage range of the LT1172HVCQ#PBF can be adjusted from 1.25V to 50V.

  4. Question: What is the maximum output current of the LT1172HVCQ#PBF?
    Answer: The LT1172HVCQ#PBF can deliver a maximum output current of up to 2.5A.

  5. Question: Is the LT1172HVCQ#PBF suitable for battery-powered applications?
    Answer: Yes, the LT1172HVCQ#PBF is suitable for battery-powered applications as it has low quiescent current and can operate efficiently at low input voltages.

  6. Question: Can the LT1172HVCQ#PBF handle step-up (boost) and step-down (buck) voltage conversion?
    Answer: Yes, the LT1172HVCQ#PBF can handle both step-up and step-down voltage conversion, making it versatile for various applications.

  7. Question: Does the LT1172HVCQ#PBF have built-in protection features?
    Answer: Yes, the LT1172HVCQ#PBF has built-in features like thermal shutdown, current limiting, and reverse-battery protection to ensure safe operation.

  8. Question: What is the efficiency of the LT1172HVCQ#PBF?
    Answer: The LT1172HVCQ#PBF has high efficiency, typically up to 90%, which helps minimize power losses.

  9. Question: Can the LT1172HVCQ#PBF operate in a wide temperature range?
    Answer: Yes, the LT1172HVCQ#PBF can operate in a temperature range of -40°C to 125°C, making it suitable for various environments.

  10. Question: Are there any application notes or reference designs available for the LT1172HVCQ#PBF?
    Answer: Yes, Linear Technology (now part of Analog Devices) provides application notes and reference designs that can help with the implementation of the LT1172HVCQ#PBF in different technical solutions.

Please note that the answers provided here are general and may vary depending on specific design considerations and requirements. It's always recommended to refer to the datasheet and application notes for detailed information.