NCP1240ED065R2G AC-DC Power Conversion by ON Semiconductor

Controller, Fixed Frequency, Current Mode, Dual OCP for Flyback Converters

Semiconductors - ICs
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Status: Unknown
Series: NCP1240
RoHS: Compliant
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The NCP1240 is a new fixed−frequency current−mode controller featuring 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. This device contains a special HV detector which detects the application unplug from the ac input line and triggers the X2 discharge current. This HV structure allows the brown-out detection as well. 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. Due to frequency foldback, the controller exhibits excellent efficiency in light load condition while still achieving very low standby power consumption. Internal frequency jittering, ramp compensation, and a versatile latch input make this controller an excellent candidate for the robust power supply designs. A dedicated Off mode allows to reach the extremely low no load input power consumption via “sleeping” whole device and thus minimize the power consumption of the control circuitry. The NCP1240 differentiates itself from the rest of the fixed frequency flyback controllers with active X2 discharge and HV start up by implementing a Dual-Level Overcurrent protection. For some applications (e.g. limited power supplies), it is necessary that the controller maintains regulation while it has detected a first level of overload. This is to authorize a transient peak power higher than the maximum continuous output power. This product is IEC60950 compliant. Please see the test report and certification in the Conformance report section below.

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Prices starting from US$0.0019

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Features

Frequency foldback and skip mode
Timer-based overload protection with latched (A version) or auto-recovery (B version) operation
High-voltage startup with dynamic self supply
Integrated brown-out detection
Frequency Modulation
Adjustable overpower protection
Timer based Dual-Level Overcurrent protection
Benefits
Optimized efficiency across the entire load range
Protection against overcurrent and short circuit
Simplifies the design of the auxiliary supply
Protects against any drops in line voltage
Softened EMI signature
Automatically adjusts the current limit depending on the line input voltage (high line or low line)
This is to authorize a transient peak power higher than the maximum continuous output power.
Applications
AC-DC Adapters
End Products
Notebook Computers

Specifications

Compliance Pb-free Halide free

Last 6 months Inventory & Pricing History

Frequently Asked Questions

Where can I find additional details, specifications and documents for a NCP1240ED065R2G?

Additional datasheets, footprints and schematics for NCP1240ED065R2G are listed on our Part Details page. You can also find images and similar parts to NCP1240ED065R2G on this page.

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What category does NCP1240ED065R2G fall under?

The NCP1240ED065R2G is listed under Power Management > AC-DC Power Conversion > Offline Controllers.

Can I view similar or alternative parts?

You can view similar parts to NCP1240ED065R2G when available in the Offline Controllers range under the specifications section at the bottom of the details page.

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Is the NCP1240ED065R2G RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by ON Semiconductor.

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Authorised distributors including Ozdisan and Avnet America have stock available or on a lead time for NCP1240ED065R2G.

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