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NCP1239CD65R2G The ON Semiconductor NCP1239CD65R2G is a 65kHz current-mode controller IC designed for flyback converters. It features a 7-SOIC package and operates within an 8.8V to 35V supply range.
Mfr Part #:

NCP1239CD65R2G

Available from 1 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor NCP1239CD65R2G is a 65kHz current-mode controller IC designed for flyback converters. It features a 7-SOIC package and operates within an 8.8V to 35V supply range.
✓ Total Stock: 30,000 pcs
$ Price Range: $0.75

NCP1239CD65R2G Available from 1 distributor

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✓ Non-Authorised
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Flip Electronics ✓
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30,000 pcs
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30000 pcs On Request 1 On Request On Request On Request On Request On Request
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NCP1239CD65R2G 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 Isolation
SVHC Present
Supplier Device Package
Topology
Voltage
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NCP1239CD65R2G Description

Short technical summary and product information.

The NCP1239CD65R2G from ON Semiconductor is a fixed-frequency, current-mode controller IC specifically designed for flyback converter applications. It operates at a nominal switching frequency of 65kHz and supports a wide supply voltage range from 8.8V to 35V.

 

This controller IC features a maximum duty cycle of 80% and includes comprehensive fault protection mechanisms such as current limiting, overload, over-temperature, and over-voltage protection. It is housed in a compact 7-SOIC package, suitable for surface mount applications.

 

The NCP1239CD65R2G is designed for isolated output applications and does not have internal switches, requiring an external power transistor. Its features make it suitable for various offline power supply designs.

NCP1239CD65R2G Quick Information

Product Type: AC DC Converter, Offline Switcher
Canonical Name: NCP1239CD65R2G Current-Mode Controller for Flyback Converter
Subcategory: Offline Switcher

NCP1239CD65R2G Compliance

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

NCP1239CD65R2G Estimated Pricing

Qty Low High
1+ $0.75 $0.75

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

NCP1239CD65R2G Features

  • Fixed-frequency 65kHz current-mode control.
  • Wide 8.8V to 35V operating voltage range.
  • 80% maximum duty cycle capability.
  • Integrated fault protection features.
  • Surface mount 7-SOIC package.

NCP1239CD65R2G Applications

  • Designed for flyback converter circuits.
  • Suitable for offline power supplies.
  • Used in AC-DC power conversion.
  • Enables isolated output designs.

NCP1239CD65R2G FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the NCP1239CD65R2G?

8.8 V to 35 V.

What package is the NCP1239CD65R2G available in?

Surface mount 7-SOIC (8-SOIC with 7 leads).

What is the operating temperature range?

-40°C to 125°C junction temperature.

What is the switching frequency of the NCP1239CD65R2G?

65 kHz.

What is the maximum duty cycle?

80%.

What topology does this controller use?

Flyback topology with isolated output.

What fault protections are included?

Current limiting, overload, overtemperature, overvoltage.

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