NCP1340 - ON Semiconductor

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

NCP1340
Manufacturer

ON Semiconductor
ChipWorker Part#

CW1242882070
Description

High-Voltage, Quasi-Resonant Controller Featuring Valley Lock-Out Switching
Documentation

Datasheet

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Product Description

The NCP1340 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 NCP1340 can enable no−load power consumption below 30 mW. The quasi−resonant current−mode flyback stage features a proprietary valley−lockout circuitry, ensuring stable valley switching. This system works down to the 6th valley and transitions to a frequency foldback mode to reduce switching losses. As the load decreases further, the NCP1340 enters quiet−skip mode to manage the power delivery. To help ensure converter ruggedness, the NCP1340 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 over voltage and NTC−ready over temperature protection through a dedicated pin, and line removal detection to safely discharge the X2 capacitors when the line is removed.
Features | | Benefits
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| | | | |
QR Frequency Jittering
| |
Reduces EMI Signature
New Quiet-Skip Technology
| |
Ensures Operation Outside Audible Range
Integrated HV Startup with Brownout Protection
| |
Provides an efficient power-on source and protects agaisnts drops in input mains voltage
Valley Switching Operation with Valley Lockout
| |
Maximizing the efficiency over the entire power range
Integrated X2 Capacitor Discharge Capability
| |
Eliminates the need for a X2 resistors
NTC Compatible Fault Pin
| |
Extra protection against high temperature or other fault conditions
High Drive Capability: -500 mA / +800 mA
| |
Enables faster switching of primary-side MOSFET
Latch input for OVP and OTP implementations
| |
Simple implementation of required protection functions

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