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NCP1271P65G The NCP1271P65G is a 65 kHz flyback offline switching controller from On Semiconductor. It features current mode control, 85% maximum duty cycle, and isolated output.
Mfr Part #:

NCP1271P65G

Available from 1 distributors
Mfr Name: On Semiconductor
On Semiconductor
The NCP1271P65G is a 65 kHz flyback offline switching controller from On Semiconductor. It features current mode control, 85% maximum duty cycle, and isolated output.
✓ Total Stock: 600 pcs
$ Price Range: $0.75

NCP1271P65G Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Bristol Electronics ✓
Non-Authorised Inventory information
600 pcs
On Request
600 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.

NCP1271P65G Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Control Method
Duty Cycle
Fault Protection
Frequency
Internal Switch(s)
Mounting Type
Operating Temperature
Output Isolation
Supplier Device Package
Topology
Voltage
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NCP1271P65G Description

Short technical summary and product information.

The NCP1271P65G is an offline switching controller designed for flyback topologies. It operates at a nominal frequency of 65 kHz with a maximum switching frequency of 69 kHz. The device supports a supply voltage range of 10 V to 20 V and provides isolated output regulation.

 

This controller uses current mode control for improved transient response and cycle-by-cycle current limiting. It offers a maximum duty cycle of 85% and features peak current drive capability of +500 mA source and -800 mA sink on the Drv pin. Rise time is 30 ns and fall time is 20 ns.

 

The NCP1271P65G is housed in a 7-pin DIP package. It is suitable for AC-DC power supply designs requiring a simple, reliable flyback controller with integrated protection features.

NCP1271P65G Quick Information

Product Type: AC DC Converter, Offline Switch
Canonical Name: NCP1271P65G Offline Switching Flyback Controller
Subcategory: AC DC Converters, Offline Switches

NCP1271P65G Compliance

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

NCP1271P65G Estimated Pricing

Qty Low High
1+ $0.75 $0.75

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

NCP1271P65G Features

  • 65 kHz nominal switching frequency.
  • 85% maximum duty cycle.
  • Current mode control for fast response.
  • +500 mA source / -800 mA sink drive.
  • Isolated flyback topology support.

NCP1271P65G Applications

  • AC-DC offline flyback power supplies.
  • Isolated switched-mode power converters.
  • Consumer and industrial power adapters.
  • Battery charger power stages.

NCP1271P65G FAQs

5 frequently asked questions generated from this part’s specifications.
What is the switching frequency of the NCP1271P65G?

The nominal switching frequency is 65 kHz, with a maximum of 69 kHz.

What is the supply voltage range for the NCP1271P65G?

The supply voltage range is 10 V to 20 V.

What is the maximum duty cycle of the NCP1271P65G?

The maximum duty cycle is 85%.

What topology does the NCP1271P65G support?

It supports flyback topology with isolated output.

What is the peak current drive capability of the NCP1271P65G?

The Drv pin provides +500 mA source and -800 mA sink peak current.

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