ON Semiconductor
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NCP1002PG
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NCP1002PG

Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - Low-power current mode controller - Designed for offline flyback converters - Provides constant voltage or constant current output - Suitable for applications requiring high efficiency and low standby power consumption

Package: PDIP-8 (Plastic Dual In-line Package)

Essence: The NCP1002PG is a highly efficient, low-power current mode controller used in offline flyback converters. It offers constant voltage or constant current output, making it suitable for various power management applications.

Packaging/Quantity: The NCP1002PG is available in a PDIP-8 package and is typically sold in reels containing multiple units.

Specifications

  • Input Voltage Range: 9V to 16V
  • Output Voltage Range: 5V to 24V
  • Maximum Output Current: 250mA
  • Operating Temperature Range: -40°C to +125°C
  • Switching Frequency: 65kHz to 115kHz
  • Standby Power Consumption: <50mW

Pin Configuration

The NCP1002PG features the following pin configuration:

  1. VCC: Power supply input
  2. GND: Ground reference
  3. CS: Current sense input
  4. FB: Feedback input
  5. COMP: Compensation pin
  6. DRAIN: Power switch drain
  7. VREF: Reference voltage output
  8. VDD: Internal bias voltage

Functional Features

  • Low-power operation for energy-efficient designs
  • Current mode control for improved stability and transient response
  • Overvoltage protection for enhanced system reliability
  • Soft-start function to prevent excessive inrush current
  • Built-in frequency jittering for reduced EMI emissions
  • External synchronization capability for multi-device operation

Advantages and Disadvantages

Advantages: - High efficiency - Low standby power consumption - Wide input voltage range - Compact package size - Built-in protection features

Disadvantages: - Limited maximum output current (250mA) - Requires external components for complete circuit implementation

Working Principles

The NCP1002PG operates as a low-power current mode controller in offline flyback converters. It regulates the output voltage or current by adjusting the duty cycle of the power switch based on the feedback signal. The current mode control provides improved stability and transient response compared to voltage mode control.

The controller incorporates various protection features, such as overvoltage protection, to ensure system reliability. It also includes a soft-start function to limit the inrush current during startup. The built-in frequency jittering reduces electromagnetic interference (EMI) emissions, making it suitable for applications with strict EMI requirements.

Application Field Plans

The NCP1002PG is commonly used in the following application fields:

  1. LED Lighting: Provides constant current output for driving LED arrays or individual LEDs.
  2. Power Adapters: Used in compact power adapters for portable electronic devices.
  3. Battery Chargers: Suitable for charging batteries in various devices, including smartphones and tablets.
  4. Home Appliances: Used in power management circuits of appliances like refrigerators, air conditioners, and washing machines.

Alternative Models

For alternative options, consider the following models that offer similar functionality:

  1. NCP1014AP065G: Low-power current mode controller with higher maximum output current (650mA).
  2. NCP1027P065G: Current mode controller with integrated power factor correction (PFC) functionality.
  3. NCP1034DR2G: High-voltage current mode controller designed for offline flyback converters.

These alternative models provide flexibility in choosing the most suitable solution for specific power management applications.

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רשום 10 שאלות ותשובות נפוצות הקשורות ליישום של NCP1002PG בפתרונות טכניים

Sure! Here are 10 common questions and answers related to the application of NCP1002PG in technical solutions:

  1. Q: What is NCP1002PG? A: NCP1002PG is a high-performance integrated circuit (IC) designed for power management applications.

  2. Q: What are the typical applications of NCP1002PG? A: NCP1002PG is commonly used in various technical solutions such as switch-mode power supplies, LED drivers, and battery chargers.

  3. Q: What is the input voltage range supported by NCP1002PG? A: NCP1002PG supports an input voltage range from 7V to 450V, making it suitable for a wide range of power supply applications.

  4. Q: Can NCP1002PG handle high current loads? A: Yes, NCP1002PG has a built-in power MOSFET that can handle high current loads up to a certain limit, typically around 1A.

  5. Q: Does NCP1002PG have any protection features? A: Yes, NCP1002PG offers various protection features like overvoltage protection, overcurrent protection, and thermal shutdown to ensure safe operation.

  6. Q: Is NCP1002PG compatible with both AC and DC input sources? A: Yes, NCP1002PG can be used with both AC and DC input sources, allowing flexibility in different power supply designs.

  7. Q: What is the efficiency of NCP1002PG? A: NCP1002PG has high efficiency due to its advanced control algorithms and low power consumption, typically achieving efficiencies above 90%.

  8. Q: Can NCP1002PG operate in a wide temperature range? A: Yes, NCP1002PG is designed to operate in a wide temperature range, typically from -40°C to 125°C, making it suitable for various environments.

  9. Q: Does NCP1002PG require external components for operation? A: Yes, NCP1002PG requires external components such as resistors, capacitors, and inductors to form a complete power management solution.

  10. Q: Is NCP1002PG available in different package options? A: Yes, NCP1002PG is available in various package options like PDIP, SOIC, and DFN, providing flexibility for different PCB layouts and applications.

Please note that the answers provided here are general and may vary depending on the specific datasheet and application requirements of NCP1002PG.