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NCP1239AD65R2G The ON Semiconductor NCP1239AD65R2G 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 SOIC-7 package.
Mfr Part #:

NCP1239AD65R2G

Available from 2 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor NCP1239AD65R2G 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 SOIC-7 package.
✓ Total Stock: 1,167 pcs
$ Price Range: $0.75

NCP1239AD65R2G Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
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
Fe Components ✓
Non-Authorised Inventory information
167 pcs
On Request
167 pcs On Request 1 On Request On Request On Request On Request On Request
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NCP1239AD65R2G Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Duty Cycle
Fault Protection
Frequency
Input Voltage
Internal Switch(s)
Mounting Style
Mounting Type
Operating Temperature
Output Current
Output Isolation
Output Voltage
Supplier Device Package
Topology
Voltage
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NCP1239AD65R2G Description

Short technical summary and product information.

The NCP1239AD65R2G from ON Semiconductor is a fixed-frequency current-mode controller specifically designed for flyback converter applications. It features a 65kHz switching frequency and operates over an input voltage range of 8.8V to 35V. The controller includes integrated features such as high-voltage start-up current source, frequency foldback down to 26kHz for light load efficiency, and timer-based short-circuit protection.

 

This device is suitable for applications requiring robust power management, including AC-DC converters for TVs, set-top boxes, and printers, as well as offline adapters for notebooks and netbooks. It offers adjustable over-power protection and internal thermal shutdown for enhanced reliability.

 

The NCP1239AD65R2G is housed in a 7-lead SOIC package and is designed for surface mounting (SMD/SMT). It operates within a temperature range of -40°C to 125°C (TJ). The controller also boasts extremely low no-load standby power, contributing to energy efficiency.

 

Key electrical characteristics include a maximum duty cycle of 80%, ±500 mA peak source/sink drive capability, and internal slope compensation. The device supports various fault protection mechanisms, including current limiting, over load, over temperature, and over voltage.

NCP1239AD65R2G Quick Information

Product Type: Switching Controller
Series: NCP1239
Canonical Name: NCP1239AD65R2G Fixed Frequency Current-Mode Controller
Subcategory: AC DC Converters, Offline Switches

NCP1239AD65R2G Compliance

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

NCP1239AD65R2G Estimated Pricing

Qty Low High
1+ $0.75 $0.75

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

NCP1239AD65R2G Features

  • Operates at 65 kHz switching frequency.
  • Supports 8.8 V to 35 V operating voltage.
  • Features Flyback topology for power conversion.
  • Includes current limiting, over load protection.
  • Packaged in a compact 7-SOIC.

NCP1239AD65R2G Applications

  • Used in AC/DC power conversion designs.
  • Suitable for offline power supply units.
  • Applied in various power management circuits.
  • Integrated into compact electronic devices.
  • Utilized in systems requiring fault protection.

NCP1239AD65R2G FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the NCP1239AD65R2G?

The NCP1239AD65R2G operates within a voltage range of 8.8 V to 35 V.

What is the operating temperature range for the NCP1239AD65R2G?

The operating temperature range for the NCP1239AD65R2G is -40°C to 125°C.

What is the package type for the NCP1239AD65R2G?

The NCP1239AD65R2G is available in a 7-SOIC package.

What is the nominal switching frequency of this device?

The nominal switching frequency is 65 kHz.

What fault protection features does the NCP1239AD65R2G include?

It includes Current Limiting, Over Load, Over Temperature, and Over Voltage fault protection.

What is the topology of the NCP1239AD65R2G?

The NCP1239AD65R2G uses a Flyback topology.

Does the NCP1239AD65R2G have brown-out detection?

Yes, it features brown-out detection.

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