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NCP1239FD65R2G The ON Semiconductor NCP1239FD65R2G is a fixed-frequency, current-mode controller designed for flyback converters. It operates at 65kHz with a wide input voltage range and is available in a surface-mount 7-SOIC package.
Mfr Part #:

NCP1239FD65R2G

Available from 1 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor NCP1239FD65R2G is a fixed-frequency, current-mode controller designed for flyback converters. It operates at 65kHz with a wide input voltage range and is available in a surface-mount 7-SOIC package.
✓ Total Stock: 5,000 pcs
$ Price Range: $0.75

NCP1239FD65R2G Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Flip Electronics ✓
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5,000 pcs
On Request
5000 pcs On Request 1 On Request On Request On Request On Request On Request
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NCP1239FD65R2G Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Duty Cycle
Fault Protection
Frequency
Internal Switch(s)
Lead Style
Mounting Type
Operating Temperature
Output Isolation
Supplier Device Package
Topology
Voltage
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NCP1239FD65R2G Description

Short technical summary and product information.

The NCP1239FD65R2G from ON Semiconductor is a fixed-frequency, current-mode controller specifically designed for flyback converter applications. It features a high-voltage start-up current source for efficient power-on sequences and operates with a jittered 65kHz switching frequency.

 

This controller supports a wide supply voltage range of 8.8V to 35V and offers a duty cycle of up to 80%. It incorporates features such as frequency foldback down to 26kHz and skip mode to optimize performance in light load conditions. The device also includes adjustable over-power protection (OPP), brown-out detection, internal slope compensation, and internal fixed soft-start.

 

For protection, the NCP1239FD65R2G includes a 64ms timer-based short-circuit protection with auto-recovery or latched operation, latched OVP on VCC, and internal thermal shutdown. It is pin-to-pin compatible with the NCP1236/1247 series.

 

The component is housed in a 7-SOIC package suitable for surface mounting. Its operating temperature range is -40°C to 125°C (TJ). The device is Pb-Free and RoHS compliant.

NCP1239FD65R2G Quick Information

Product Type: AC DC Converters, Offline Switches
Canonical Name: NCP1239FD65R2G Fixed Frequency Current-Mode Controller for Flyback Converter
Subcategory: Offline Switch

NCP1239FD65R2G Compliance

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

NCP1239FD65R2G Estimated Pricing

Qty Low High
1+ $0.75 $0.75

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

NCP1239FD65R2G Features

  • Fixed 65kHz current-mode control operation.
  • Frequency foldback down to 26kHz.
  • Wide 8.8V to 35V VCC operation.
  • Surface mount 7-SOIC package.
  • Pb-Free and RoHS compliant.

NCP1239FD65R2G Applications

  • Used in AC-DC converters.
  • Suitable for TVs and set-top boxes.
  • Applicable to printer power supplies.
  • Designed for offline adapters.

NCP1239FD65R2G FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the NCP1239FD65R2G?

The operating voltage range is 8.8 V to 35 V.

What is the switching frequency of the NCP1239FD65R2G?

The switching frequency is 65 kHz, with foldback down to 26 kHz.

What type of package is the NCP1239FD65R2G in?

The NCP1239FD65R2G is supplied in a 7-SOIC package for surface mounting.

What is the operating temperature range for this component?

The operating temperature range is -40°C to 125°C (TJ).

Does the NCP1239FD65R2G have over-power protection?

Yes, it features adjustable over-power protection (OPP).

What is the duty cycle of the NCP1239FD65R2G?

The duty cycle is 80%.

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