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NCP1246ALD100R2G
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NCP1246ALD100R2G

Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High voltage startup - Current mode control - Frequency jittering for EMI reduction - Built-in protection features - Low standby power consumption

Package: DFN-8 (Dual Flat No-Lead)

Essence: The NCP1246ALD100R2G is a highly integrated IC designed for power management applications. It offers high voltage startup, current mode control, and various built-in protection features.

Packaging/Quantity: The NCP1246ALD100R2G is available in a DFN-8 package. The quantity per reel is typically 3000 units.

Specifications

  • Input Voltage Range: 9V to 38V
  • Output Voltage Range: 5V to 24V
  • Maximum Output Current: 700mA
  • Switching Frequency: 65kHz to 115kHz
  • Operating Temperature Range: -40°C to +125°C

Pin Configuration

The NCP1246ALD100R2G has the following pin configuration:

  1. VCC: Power supply input
  2. GND: Ground reference
  3. FB: Feedback pin for output voltage regulation
  4. COMP: Compensation pin for loop stability
  5. CS: Current sense pin for current mode control
  6. SS: Soft-start pin for controlled startup
  7. RT: External resistor connected to set switching frequency
  8. HV: High voltage startup pin

Functional Features

  • High voltage startup enables operation in wide input voltage range.
  • Current mode control provides excellent line and load regulation.
  • Frequency jittering reduces electromagnetic interference (EMI).
  • Built-in protection features include overvoltage, overcurrent, and thermal shutdown.
  • Low standby power consumption enhances energy efficiency.

Advantages

  • Wide input voltage range allows for versatile applications.
  • Excellent line and load regulation ensures stable output voltage.
  • Frequency jittering reduces EMI, meeting regulatory requirements.
  • Built-in protection features enhance system reliability.
  • Low standby power consumption saves energy.

Disadvantages

  • Limited maximum output current may not be suitable for high-power applications.
  • Fixed switching frequency may not be adjustable for specific requirements.

Working Principles

The NCP1246ALD100R2G operates on the principle of current mode control. It regulates the output voltage by adjusting the duty cycle of the internal power switch based on the feedback signal from the FB pin. The high voltage startup feature allows the IC to operate in a wide input voltage range. Frequency jittering is employed to reduce EMI emissions. The IC also incorporates various protection mechanisms to safeguard against overvoltage, overcurrent, and thermal issues.

Application Field Plans

The NCP1246ALD100R2G is commonly used in power management applications, including but not limited to: - AC-DC adapters - LED lighting - Set-top boxes - Home appliances - Industrial equipment

Alternative Models

Some alternative models that can be considered as replacements for the NCP1246ALD100R2G include: - NCP1246AD100R2G - NCP1246BD100R2G - NCP1246CD100R2G - NCP1246DD100R2G

These models offer similar functionality and characteristics, providing flexibility in design choices.

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av NCP1246ALD100R2G i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of NCP1246ALD100R2G in technical solutions:

  1. Q: What is NCP1246ALD100R2G? A: NCP1246ALD100R2G is a high-performance, fixed-frequency current-mode controller designed for offline flyback converters.

  2. Q: What are the key features of NCP1246ALD100R2G? A: Some key features include a built-in 700 V MOSFET, frequency jittering for EMI reduction, adjustable peak current limit, and protection features like overvoltage and overcurrent protection.

  3. Q: What is the typical input voltage range for NCP1246ALD100R2G? A: The typical input voltage range is from 85 VAC to 265 VAC.

  4. Q: Can NCP1246ALD100R2G be used in both AC-DC and DC-DC applications? A: No, NCP1246ALD100R2G is specifically designed for AC-DC applications.

  5. Q: What is the maximum switching frequency supported by NCP1246ALD100R2G? A: The maximum switching frequency is typically around 100 kHz.

  6. Q: How can I adjust the output voltage using NCP1246ALD100R2G? A: The output voltage can be adjusted by changing the value of the feedback resistor connected to the FB pin.

  7. Q: Does NCP1246ALD100R2G have any protection features? A: Yes, it has various protection features including overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.

  8. Q: Can NCP1246ALD100R2G operate in a wide temperature range? A: Yes, it can operate in a temperature range of -40°C to 125°C.

  9. Q: What is the typical efficiency of NCP1246ALD100R2G? A: The typical efficiency is around 85-90%, depending on the specific application and operating conditions.

  10. Q: Are there any reference designs available for NCP1246ALD100R2G? A: Yes, ON Semiconductor provides reference designs and application notes that can help in implementing NCP1246ALD100R2G in various technical solutions.

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