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NCP1239ED100R2G The ON Semiconductor NCP1239ED100R2G is a fixed-frequency, current-mode controller designed for flyback converters. It operates at 100kHz with a wide input voltage range.
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NCP1239ED100R2G

Available from 1 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor NCP1239ED100R2G is a fixed-frequency, current-mode controller designed for flyback converters. It operates at 100kHz with a wide input voltage range.
✓ Total Stock: 15,000 pcs
$ Price Range: $0.75

NCP1239ED100R2G Available from 1 distributor

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✓ Non-Authorised
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15,000 pcs
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NCP1239ED100R2G 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
Supplier Device Package
Supplier Package
Topology
Voltage
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NCP1239ED100R2G Description

Short technical summary and product information.

The NCP1239ED100R2G from ON Semiconductor is a fixed-frequency, current-mode controller specifically designed for flyback converter applications. This device operates at a nominal switching frequency of 100kHz and supports a wide input voltage range from 8.8V to 35V.

 

Key features include adjustable over power protection, frequency foldback down to 26kHz for light load efficiency, and a 64ms timer-based short-circuit protection with auto-recovery or latched operation. It also incorporates internal slope compensation and a fixed soft-start function.

 

The controller is housed in a 7-SOIC surface-mount package, making it suitable for compact designs. Its high-voltage start-up current source simplifies power-on sequences. The device is pin-to-pin compatible with the NCP1236 and NCP1247 series.

 

Typical applications include AC-DC converters for TVs, set-top boxes, printers, and offline adapters for notebooks and netbooks. The controller offers features like internal thermal shutdown and extremely low no-load standby power.

NCP1239ED100R2G Quick Information

Product Type: Switching Controller
Canonical Name: NCP1239ED100R2G Fixed Frequency Current-Mode Controller
Subcategory: AC DC Converters, Offline Switches

NCP1239ED100R2G Compliance

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

NCP1239ED100R2G Estimated Pricing

Qty Low High
1+ $0.75 $0.75

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

NCP1239ED100R2G Features

  • Fixed-frequency 100kHz current-mode control.
  • Frequency foldback down to 26kHz.
  • Adjustable over power protection.
  • 64ms timer-based short-circuit protection.
  • Surface mount 7-SOIC package.

NCP1239ED100R2G Applications

  • Used in AC-DC adapters and chargers.
  • Ideal for isolated flyback power supplies.
  • Suitable for industrial power supply systems.
  • Designed for low standby power applications.

NCP1239ED100R2G FAQs

5 frequently asked questions generated from this part’s specifications.
What is the switching frequency of the NCP1239ED100R2G?

The switching frequency is 100 kHz.

What is the operating voltage range for the NCP1239ED100R2G?

The operating voltage range is 8.8 V to 35 V.

What is the operating temperature range of this switching controller?

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

What is the package type for the NCP1239ED100R2G?

The package type is 7-SOIC, surface mount.

Is the NCP1239ED100R2G RoHS compliant?

Yes, it is RoHS3 Compliant.

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