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NCP1251ASN65T1G

With its small footprint and reliable performance, the NCP1251ASN65T1G is an ideal choice for power management solutions

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Overview of NCP1251ASN65T1G

The NCP1251ASN65T1G is a PWM Controller IC designed for use in power supply applications. It features a built-in 650V MOSFET and comprehensive protection features, making it suitable for offline flyback converters and AC-DC power supplies.

Pinout

(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

  • VDD: Power Supply Pin
  • FB: Feedback Pin for Voltage Regulation
  • EN/UVLO: Enable and Undervoltage Lockout Pin
  • CS: Current Sense Pin
  • GND: Ground Connection
  • X: Connection for External Synchronization

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the NCP1251ASN65T1G IC for a visual representation.

Key Features

  • Integrated 650V MOSFET: The NCP1251ASN65T1G features a built-in MOSFET for simplified design and high voltage capability.
  • Comprehensive Protection Features: This IC offers protection against overcurrent, overvoltage, undervoltage, and thermal issues for enhanced reliability.
  • Programmable Frequency: The PWM frequency of the NCP1251ASN65T1G can be programmed externally, providing flexibility in power supply designs.
  • Soft-Start Functionality: Includes a soft-start feature to limit inrush current during power-up, protecting the components and improving startup performance.
  • Adjustable Overcurrent Protection: Allows for adjustable overcurrent protection settings to safeguard the system under fault conditions.

Note: For detailed technical specifications, please refer to the NCP1251ASN65T1G datasheet.

Application

  • Offline Flyback Converters: Ideal for use in offline flyback converter circuits for various power supply applications.
  • AC-DC Power Supplies: Suitable for AC-DC power supply designs in consumer electronics, industrial equipment, and lighting applications.
  • Power Adapters: Used in power adapter designs for portable electronic devices and chargers.

Functionality

The NCP1251ASN65T1G is a versatile PWM controller IC designed for power supply applications, offering efficient control and protection features for reliable operation.

Usage Guide

  • Power Supply: Connect VDD (Pin 1) to the power supply voltage within the specified range.
  • Feedback Loop: Connect the FB pin (Pin 2) to implement voltage regulation and feedback control.
  • Protection Features: Utilize the EN/UVLO pin (Pin 3) for enabling the device and implementing undervoltage lockout.

Frequently Asked Questions

Q: What is the maximum voltage rating of the integrated MOSFET in the NCP1251ASN65T1G?
A: The NCP1251ASN65T1G features an integrated 650V MOSFET for high voltage operation in power supply applications.

Q: Can the NCP1251ASN65T1G be used in offline power systems without an optocoupler?
A: Yes, the NCP1251ASN65T1G includes comprehensive protection features and does not require an optocoupler for offline power supply designs.

Equivalent

For similar functionalities, consider these alternatives to the NCP1251ASN65T1G:

  • NCP1250DR2G: An alternative PWM controller IC with similar features and performance characteristics.
  • NCP1260ADR2G: This IC offers enhanced power management capabilities and protection features compared to the NCP1251ASN65T1G.

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Status Last Shipments Compliance PbAHP
Package Type TSOP-6 Case Outline 318G-02
MSL Type 1 MSL Temp (°C) 260
Container Type REEL Container Qty. 3000
ON Target N Topology Flyback
Control Mode Current Mode fsw Typ (kHz) 65
Stand-by Mode Yes UVLO (V) 8.8
Short Circuit Protection Yes Latch Yes
Soft Start Yes VCC Max (V) 28
Drive Cap. (mA) 300 / 500 Pricing ($/Unit) Price N/A

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