NCP1234BD65R2G AC-DC Power Conversion by ON Semiconductor

Controller, Fixed Frequency, Current Mode, for Flyback Converters

Status: Active
Series: NCP1234
RoHS: Compliant
View Datasheet Manufacturer Site View Pricing & Stock

NCP1234 is a new fixed-frequency current-mode controller featuring Dynamic Self-Supply (DSS). This device is pin-to-pin compatible with the previous NCP12xx families. The DSS 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 transients. 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 converters where component cost is the key constraint. It features a timer-based fault detection that ensures the detection of overload independently of an auxiliary winding, and an adjustable compensation to help keep the maximum power independent of the input voltage.

Prices starting from US$0.48


Distributor Starting From Stock
Logo for Newark Electronics Newark Electronics US$0.48
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Logo for Future Electronics Future Electronics US$0.49
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Logo for Avnet America Avnet America US$0.51
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Logo for element14 element14 US$0.52
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Features

Frequency Foldback then Skip Mode in light load and standby conditions
High voltage current source with brown-out detection and dynamic self-supply
Frequency Jittering
4.0 ms Soft-Start
Adjustable Overpower Compensation
Latched / Autorecovery Timer-Based Overload Protection
Benefits
High efficiency in light and no load conditions
Directly powered from the high voltage rail with integrated brown-out sensing to detect low input voltage
Helps pass EMI requirements by spreading out the energy content of frequency peaks
Minimizes the stress on power components
Monitors the input voltage to limit the amount of power being delivered by the converter
Protects against overcurrent
Applications
Consumer Electronics Power Supplies
Notebooks
End Products
Auxiliary/Housekeeping power supplies

Specifications

Description NCP1234
Compliance Pb-free Halide free
Topology Flyback
Control Mode Current Mode
fsw Typ (kHz) 65
Stand-by Mode Yes
UVLO (V) 9.5
Short Circuit Protection Yes
Latch Yes
Soft Start Yes
VCC Max (V) 28
Drive Cap. (mA) 500 / 500
Package Type SOIC-7

Alternative Descriptions

Controller, Fixed Frequency, Current Mode, For Flyback Converters/Reel |Onsemi NCP1234BD65R2G | Newark Electronics
NOBRWN AREC OCP OVP 65KHZ | Future Electronics
Current Mode PWM Controller 500mA 7-Pin SOIC T/R | Avnet America
PWM CONTROLLER, 65KHZ, 28V, SOIC-7 | element14


Frequently Asked Questions

Where can I find additional details, specifications and documents for a NCP1234BD65R2G?

Additional datasheets, footprints and schematics for NCP1234BD65R2G are listed on our Part Details page. You can also find images and similar parts to NCP1234BD65R2G on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for NCP1234BD65R2G on our Product Comparison page. Access via the 'View Pricing & Stock' button to view NCP1234BD65R2G price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does NCP1234BD65R2G fall under?

The NCP1234BD65R2G is listed under Power Management > AC-DC Power Conversion > Offline Controllers.

Can I view similar or alternative parts?

You can view similar parts to NCP1234BD65R2G when available in the Offline Controllers range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the NCP1234BD65R2G you can contact the distributor directly for product support, shipping queries etc.

Is the NCP1234BD65R2G RoHS compliant?

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

Which authorised distributors for NCP1234BD65R2G have stock available?

Authorised distributors including Newark Electronics, Future Electronics, Avnet America, element14 and Farnell have stock available or on a lead time for NCP1234BD65R2G.

How do I check stock and lead times for all distributors?

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