NCP1342AMAACD1R2G AC-DC Power Conversion by ON Semiconductor

Quasi-Resonant Flyback Controller with Valley Lock-Out Switching

Status: Active
Series: NCP1342
RoHS: Compliant
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The NCP1342 is a highly integrated quasi-resonant flyback controller suitable for designing high-performance off-line power converters. With an integrated active X2 capacitor discharge feature, the NCP1342 can enable no-load power consumption below 30 mW. The NCP1342 features proprietary valley-lockout circuitry, ensuring stable valley switching. This system works down to the 6th valley and transitions to frequency foldback mode to reduce switching losses. As the load decreases further, the NCP1342 enters quiet-skip mode to manage the power delivery while minimizing acoustic noise. To ensure light load performance with high frequency designs, the NCP1342 incorporates Minimum Peak Current Modulation (MPCM) to reduce the switching frequency quickly. To help ensure converter ruggedness, the NCP1342 implements several key protective features such as internal brownout detection, a non-dissipative Over Power Protection (OPP) for constant maximum output power regardless of input voltage, a latched overvoltage and NTC-ready overtemperature protection through a dedicated pin, and line removal detection to safely discharge the X2 capacitors when the ac line is removed.

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Prices starting from US$0.54

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Features

Minimum Peak Current Modulation for Rapid Frequency Foldback (RFF)
QR Frequency Jittering
Quiet-Skip Technology
Integrated HV Startup with Brownout Protection
Valley Switching Operaton with Valley Lockout
Integrated X2 Capacitor Discharge Capability
NTC Compatible Fault Pin
High Drive Capability: -500 mA / +800 mA
Latch input for OVP and OTP implementation
Benefits
Fast reduction of switching frequency for improved light load efficiency
Reduces EMI Signature
Ensures Operation Outside Audible Range
Provides an efficient power-on source and protects against drops in input mains voltage
Maximizes the efficiency over the entire power range
Eliminates the need for a X2 resistor
Extra protection against high temperature or other fault conditions
Enables faster switching of primary-side MOSFET
Simple implementation of required protection functions
Applications
Medium or High Power AC-DC Adapters
USB PD Compliant
Flat TV SMPS
Phone and Tablet Adapters
End Products
Ultra High Density AC-DC Adapters
Notebook Adapters
Computer Power Supplies

Specifications

Description NCP1342
Compliance Pb-free Halide free
Topology Flyback
Control Mode Current Mode
fsw Typ (kHz) Variable
Stand-by Mode Yes
UVLO (V) 9
Short Circuit Protection Yes
Latch No
Soft Start Yes
VCC Max (V) 30
Drive Cap. (mA) 500 / 800
Package Type SOIC-9 NB

Alternative Descriptions

ON SEMICONDUCTOR NCP1342AMAACD1R2G | Rapid Electronics
Quasi-Resonant Flyback Ctrl, Nsoic-9 | Newark Electronics
QUASI-RESONANT FLYBACK CTRL, NSOIC-9 | element14
ON Semiconductor, NCP1342AMAACD1R2G | RS
AC DC Controller Quasi Resonant Flyback Controller Single 9 to 28V Flyback 9-Pin SOIC T/R | Avnet America


Frequently Asked Questions

Where can I find additional details, specifications and documents for a NCP1342AMAACD1R2G?

Additional datasheets, footprints and schematics for NCP1342AMAACD1R2G are listed on our Part Details page. You can also find images and similar parts to NCP1342AMAACD1R2G on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for NCP1342AMAACD1R2G on our Product Comparison page. Access via the 'View Pricing & Stock' button to view NCP1342AMAACD1R2G price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does NCP1342AMAACD1R2G fall under?

The NCP1342AMAACD1R2G is listed under Power Management > AC-DC Power Conversion > Offline Controllers.

Can I view similar or alternative parts?

You can view similar parts to NCP1342AMAACD1R2G 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 NCP1342AMAACD1R2G you can contact the distributor directly for product support, shipping queries etc.

Is the NCP1342AMAACD1R2G RoHS compliant?

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

Which authorised distributors for NCP1342AMAACD1R2G have stock available?

Authorised distributors including Rapid Electronics, Chip One Stop, Newark Electronics, element14 and Farnell have stock available or on a lead time for NCP1342AMAACD1R2G.

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

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