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NCP1251BSN100T1G The ON Semiconductor NCP1251BSN100T1G is a Current-Mode PWM Controller designed for offline power supplies. It operates at a switching frequency of 100kHz and supports a wide VCC range.
Mfr Part #:

NCP1251BSN100T1G

Available from 4 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor NCP1251BSN100T1G is a Current-Mode PWM Controller designed for offline power supplies. It operates at a switching frequency of 100kHz and supports a wide VCC range.
✓ Total Stock: 28,413 pcs
$ Price Range: $0.75

NCP1251BSN100T1G Available from 4 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Risen Electronics ✓
Non-Authorised Inventory information
15,000 pcs
On Request
15000 pcs On Request 1 On Request On Request On Request On Request 2026-02-16 21:33:16
Xingangxin ✓
Non-Authorised Inventory information
6,413 pcs
On Request
6413 pcs On Request 1 On Request On Request On Request On Request On Request
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
6,000 pcs
On Request
6000 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.

NCP1251BSN100T1G Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Duty Cycle
Fault Protection
Frequency
Internal Switch(s)
Mounting Style
Mounting Type
Operating Temperature
Operating Voltage
Output Isolation
SVHC Present
Supplier Device Package
Topology
Voltage
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NCP1251BSN100T1G Description

Short technical summary and product information.

The NCP1251BSN100T1G from ON Semiconductor is a highly integrated PWM controller for offline power supplies. It features fixed-frequency, current-mode control operation at 100 kHz, with frequency foldback down to 26 kHz under light load conditions. The controller supports a wide supply voltage range of 8.8V to 28V.

 

Key protection features include internal and adjustable Over Power Protection (OPP), a latched Over Voltage Protection (OVP) on the VCC line, and a 100 ms timer-based auto-recovery short-circuit protection. It also incorporates internal ramp compensation and a fixed 4 ms soft-start.

 

This device is available in a compact 6-TSOP package, suitable for surface mount applications. Its design facilitates rugged and high-performance offline power supplies, meeting EPS 2.0 standards and offering less than 100 mW standby power at high line.

 

Typical applications include AC-DC converters for TVs, set-top boxes, printers, and offline adapters for notebooks and netbooks.

NCP1251BSN100T1G Quick Information

Product Type: AC DC Converters, Offline Switches
Series: NCP1251
Canonical Name: NCP1251 Current-Mode PWM Controller
Subcategory: PMIC - Power Management ICs

NCP1251BSN100T1G Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: Pb-Free

NCP1251BSN100T1G Estimated Pricing

Qty Low High
1+ $0.75 $0.75

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

NCP1251BSN100T1G Features

  • Current-mode PWM controller for offline supplies.
  • 100 kHz fixed-frequency operation.
  • Frequency foldback down to 26 kHz.
  • Integrated Over Power, Over Voltage protection.
  • Timer-based auto-recovery short-circuit protection.

NCP1251BSN100T1G Applications

  • Used in AC-DC converters for TVs.
  • Suitable for set-top box power supplies.
  • Applied in printer power adapters.
  • Ideal for notebook power adapters.

NCP1251BSN100T1G FAQs

5 frequently asked questions generated from this part’s specifications.
What is the switching frequency of the NCP1251BSN100T1G?

The NCP1251BSN100T1G operates at a fixed frequency of 100 kHz, with frequency foldback down to 26 kHz under light load conditions.

What is the operating voltage range for the NCP1251BSN100T1G?

The operating supply voltage range for this controller is from 8.8 V to 28 V.

What type of fault protection is included in the NCP1251BSN100T1G?

It includes Over Power Protection (OPP), Over Voltage Protection (OVP) on the VCC line, and a timer-based auto-recovery Short-Circuit Protection (SCP).

What is the package type for the NCP1251BSN100T1G?

The NCP1251BSN100T1G is available in a 6-TSOP package.

What is the RoHS status of the NCP1251BSN100T1G?

The NCP1251BSN100T1G is RoHS3 Compliant and Pb-Free.

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