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The NCP1239DD65R2G is a fixed-frequency current-mode controller featuring the Dynamic Self-Supply. This function greatly simplifies the design of the auxiliary supply and the Vcc capacitor by activating the internal startup current source to supply the controller during start-up, transients, latch, stand-by etc. With a supply range up to 35 V, the controller hosts a jittered 65 or 100-kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts to decrease, the controller automatically folds back its switching frequency down to minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while limiting the peak current that insures excellent efficiency in light load condition. It features a timer-based fault detection that ensures the detection of overload and an adjustable compensation to help keep the maximum power independent of the input voltage.

Features Of NCP1239DD65R2G

• Fixed-Frequency 65-kHz or 100-kHz Current-Mode Control Operation

• Frequency Foldback Down to 26 kHz and Skip Mode to Maximize Performance in Light Load Conditions

• Adjustable Over Power Protection (OPP) Circuit

• High-Voltage Current Source with Brown-Out (BO) Detection

• Internal Slope Compensation

• Internal Fixed Soft-Start

• Frequency Jittering in Normal and Frequency Foldback Modes

• 64-ms Timer-Based Short-Circuit Protection with Auto-Recovery or Latched Operation

• Pre-Short Ready for Latched OCP Versions

• Latched OVP on VCC – Autorecovery for C and E Versions

• Latched OVP/OTP Input for Improved Robustness

• 35-V VCC Operation

• ±500 mA Peak Source/Sink Drive Capability

• Internal Thermal Shutdown

• Extremely Low No-Load Standby Power

• Pin-to-Pin Compatible with the Existing NCP1236/1247 Series

• These Devices are Pb-Free and are RoHS Compliant

Specifications Of NCP1239DD65R2G

Topology: Flyback

Number of Outputs: 1 Output

Switching frequency: 65 kHz

Duty cycle - max: 84 %

Output voltage: 13.5 V

Output current: 500 mA

Minimum operating temperature: - 40 C

Maximum operating temperature: + 125 C

Mounting style: SMD/SMT

Package / Case: SOIC-7

Dropout time: 30 ns

Insulation: Non-Isolated

Operating supply current: 1.4 mA

Operating supply voltage: 8.8 V to 35 V

Typical Applications Of NCP1239DD65R2G

• AC-DC Converters for TVs, Set-Top Boxes and Printers

• Offline Adapters for Notebooks and Netbooks

• 1.Is the inventory and price seen on the platform accurate?

  A: all online goods on the shelves can be ordered online, but considering the large liquidity of spot inventory, it is not possible to achieve 100% accuracy at present. In case of any abnormality, you can contact our company online and give the corresponding solution.

• 2.Are all our products genuine?

  A: our self-supporting products are from cooperative domestic and foreign original factories or authorized agents, and the source can be traced to ensure the original and authentic products.

• 3.Can you provide the qualification certificate of the original factory or agent?

  A: at present, our self-employed brands TI，ST，ADI，NXP，LATTICE，CYPRESS，INFINEON，XILINX and other first-line brands. Other channels are the original factory and agency channels. If necessary, we can communicate and confirm according to the specific brand and model.

• 4.Can I make an inquiry through the company's website?

  A: You can inquire through the website, or by phone and email.

• 5.When can I deliver the goods after placing an order? How long will it take to get there?

  A: the delivery date is marked in most commodity information. You can estimate the delivery time of the commodity according to the delivery date. The specific arrival time depends on the warehouse where the commodity is located and the logistics mode you choose.

• 6.Can the company issue an invoice?

  A: you can issue ordinary invoices for individual users or special VAT invoices for enterprise users.