描述 Description

The NCP1339 is a highly integrated quasi-resonant flyback controller capable of controlling rugged and high-performance off-line power supplies as required by adapter applications. With an integrated active X-cap discharge feature and power savings mode, the NCP1339 can enable no-load power consumption below 10 mW for 65 W notebook adapters.
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 toggles to a frequency foldback mode to eliminate switching losses. When the loop tends to force below 25-kHz frequencies, the NCP1339 skips cycles to contain the power delivery.
To help build rugged converters, the controller features several key protective features: an internal brown-out, a non-dissipative Over Power Protection for a constant maximum output current regardless of the input voltage, a latched over voltage protection through a dedicated pin.

特性 Features

? Loss-free Adjustable Over Power Protection
? Limits the peak current according to input line voltage
? Latched / Autorecovery Timer-Based Overload Protection
? Short circuit protection for improved reliability
? Brown Out Protection
? Protects against drops in input mains voltage
? High voltage startup current source
? Provides a quick and lossless power-on sequence
? Active Input Filter Capacitor Discharge Circuitry
? Eliminates the need for a X2 resistors
? Latch input for OVP and OTP implementations
? Simple implementation of required protection functions
? Valley Switching Operation with Valley-Lockout
? Improved efficiency with noise immunity

應(yīng)用 Application

? High Power Ac-Dc converters
? Ultra High Density Adapters
? Notebook Adapters
? Flat TV SMPS
? USB-Pd Adapters

簡介

NCP1339屬于開發(fā)板套件編程器的評估板-DC/DC與AC/DC（離線）SMPS。由制造生產(chǎn)的NCP1339評估板 - DC/DC 與 AC/DC（離線）SMPS該系列產(chǎn)品提供了一種方便的方法，可對開關(guān)模式電源轉(zhuǎn)換所用的器件（包括 DC-DC 和 AC-DC 型）進(jìn)行性能或特性評估?！胺€(wěn)壓器”（包含內(nèi)部電源開關(guān)裝置）和“控制器”（設(shè)計為控制外部電源開關(guān)）之類的器件均包括在內(nèi)。