myMectronic
myMectronic

A Premier B2B Part Search

ONSEMI NCP1251ASN65T1G Power Supply Controller

The NCP1251 is a highly integrated current-mode PWM controller designed for off-line power supplies, including TVs, adapters, and printers. It features fixed 65 or 100 kHz switching, internal ramp compensation, an advanced over power protection system, frequency foldback to reduce light-load power consumption, and soft-start. Its built-in overvoltage, overcurrent, and short-circuit protections ensure high reliability. Operating up to 28 V, it offers low standby power, optional auto-recovery or latched protections, and is compatible with EPS 2.0 standards, making it ideal for efficient, compact, and robust power conversion applications.

Authorized Distributors
Source:DigiKey
Part No:NCP1251ASN65T1G
Stock:5452
Inv Date:06-10-2026
Price: Unit price: $0.54
Buy/RFQ:
Part No:NCP1251ASN65T1G
Stock:2948
Inv Date:06-11-2026
Price: Unit price: $0.54
Buy/RFQ:
Part No:NCP1251ASN65T1G
Stock:0
Inv Date:06-10-2026
Price: Unit price: $0.54
Buy/RFQ:

ONSEMI NCP1251ASN65T1G Power Supply Controller Specifications:

  • Switching Frequency: 65 kHz or 100 kHz fixed or adjustable variants
  • Operation Voltage: Up to 28 V Vcc
  • Frequency Foldback: Down to 26 kHz during light load
  • Protection Types: Over Power Protection, Over Voltage Protection, Short Circuit Protection, Over Temperature Protection
  • Protection Modes: Latched or Auto-Recovery OVP, Auto-Recovery or Latch OPP/OTP
  • Soft-Start Duration: 4 ms fixed
  • Maximum Drive Current: ±300 mA
  • Input Pins: Feedback, Current Sense, OPP/OVP, Driver Output
  • Package: TSOP-6 (CASE 318G)

Buy the ON Semiconductor NCP1251 Series PWM Controller: NCP1251ASN65T1G

Shop the ON Semiconductor NCP1251ASN65T1G online today and benefit from a compact, reliable PWM controller ideal for offline power supplies. This controller features fixed switching frequencies of 65 kHz, 100 kHz, internal ramp compensation, and advanced protections including over voltage, over power, and short circuit protections. Its low standby power, frequency foldback, and soft-start capabilities ensure efficient operation in applications like TVs, adapters, and printers. Order now to ensure a high-performance, durable, and cost-effective power management solution for your projects.

Order your ON Semiconductor NCP1251ASN65T1G PWM controller today and enhance your power supply designs with reliable protection and high efficiency.

Frequently Asked Questions

Where can I buy ONSEMI NCP1251ASN65T1G?

You can click on the BUY or RFQ button to purchase NCP1251ASN65T1G from an authorized ONSEMI distributor.

How do I troubleshoot issues or seek technical support for part NCP1251ASN65T1G?

You can download the NCP1251ASN65T1G datasheet or visit the ONSEMI website for support.

Who is the manufacturer of NCP1251ASN65T1G?

ONSEMI

ONSEMI Part List

Browse and search other ONSEMI parts, locate datasheets and stock

Sponsored by