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NCP1251BSN65T1G The ON Semiconductor NCP1251BSN65T1G is a highly integrated PWM controller for offline power supplies. It operates in current-mode control with a switching frequency of 65 kHz.
Mfr Part #:

NCP1251BSN65T1G

Available from 3 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor NCP1251BSN65T1G is a highly integrated PWM controller for offline power supplies. It operates in current-mode control with a switching frequency of 65 kHz.
✓ Total Stock: 11,737 pcs
$ Price Range: $0.75

NCP1251BSN65T1G Available from 3 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Smaxon Electronics ✓
Non-Authorised Inventory information
6,000 pcs
On Request
6000 pcs On Request 1 On Request On Request 1438+ On Request On Request
Xingangxin ✓
Non-Authorised Inventory information
4,737 pcs
On Request
4737 pcs On Request 1 On Request On Request On Request On Request On Request
Braun Electronic Components ✓
Non-Authorised Inventory information
1,000 pcs
On Request
1000 pcs On Request 1 On Request On Request On Request On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

NCP1251BSN65T1G Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Duty Cycle
Fault Protection
Frequency
Internal Switch(s)
Mounting Type
Operating Temperature
Output Current
Output Isolation
Supplier Device Package
Supply Current
Topology
Voltage
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NCP1251BSN65T1G Description

Short technical summary and product information.

The ON Semiconductor NCP1251BSN65T1G is a current-mode PWM controller designed for rugged, high-performance offline power supplies. It features a fixed switching frequency of 65 kHz, with options for 100 kHz operation, and can operate within a supply voltage range of 8.8 V to 28 V.

 

This controller integrates Over Power Protection (OPP) and Over Voltage Protection (OVP) for robust system safety. It also includes a 100 ms timer-based auto-recovery short-circuit protection. The device supports frequency foldback down to 26 kHz and skip-cycle operation in light load conditions, contributing to energy efficiency.

 

Packaged in a compact 6-TSOP (SOT-23-6 Thin) surface-mount package, the NCP1251BSN65T1G is suitable for space-constrained applications. Its isolated Flyback topology makes it ideal for AC-DC converters used in devices such as TVs, set-top boxes, and printers, as well as offline adapters for notebooks and netbooks.

NCP1251BSN65T1G Quick Information

Product Type: Switching Controller
Series: NCP1251
Canonical Name: NCP1251 Current-Mode PWM Controller
Subcategory: Current Mode PWM Controllers

NCP1251BSN65T1G Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

NCP1251BSN65T1G Estimated Pricing

Qty Low High
1+ $0.75 $0.75

Estimated market price range - modelled values for guidance only, not live distributor offers.

NCP1251BSN65T1G Features

  • Fixed-frequency 65 kHz current-mode control.
  • Adjustable Over Power Protection (OPP) circuit.
  • Frequency foldback down to 26 kHz.
  • 100 ms timer-based auto-recovery protection.
  • Compact 6-TSOP package for surface mounting.

NCP1251BSN65T1G Applications

  • Used in offline power supply designs.
  • Suitable for AC-DC converters.
  • Ideal for TVs and set-top boxes.
  • Applicable for notebook adapters.

NCP1251BSN65T1G FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the NCP1251BSN65T1G?

The NCP1251BSN65T1G operates within a voltage range of 8.8 V to 28 V.

What is the package type for the NCP1251BSN65T1G?

The NCP1251BSN65T1G is available in a TSOP-6 package, also referred to as SOT-23-6 Thin or TSOT-23-6.

What is the operating temperature range for the NCP1251BSN65T1G?

The operating temperature range for the NCP1251BSN65T1G is -40°C to 125°C.

What is the switching frequency of the NCP1251BSN65T1G?

The NCP1251BSN65T1G has a nominal switching frequency of 65 kHz or 100 kHz.

What fault protection features does the NCP1251BSN65T1G include?

The NCP1251BSN65T1G includes over power, over voltage, and short circuit fault protection.

What is the maximum output current of the NCP1251BSN65T1G?

The NCP1251BSN65T1G has a nominal output current of 300 mA.

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