原边反馈（5级能效）

The FT838NB/FT838RNA controller device is optimized for high-performance, low power switching mode power supply applications. The  FT838NB/FT838RNA facilitates CC/CV charger design by eliminating an opto-coupler and TL431. Its highly integrated functions such as Under Voltage Lockout (UVLO), Leading Constant-Current (CC) and Constant-Voltage (CV) with Primary Side Control\nProprietary technology enabling high efficiency and fast dynamic response\nNo audible noise over entire operating range\nBuilt-in power NPN \nBuilt-in Cable Compensation\nBuilt-in Line Compensation\nPrimary-side feedback elim;

FMD

辉芒微电子

EPITAXIAL PLANAR NPN TRANSISTOR (SWITCHING, INTERFACE CIRCUIT AND DRIVER CIRCUIT)

SWITCHING APPLICATION. INTERFACE CIRCUIT AND DRIVER CIRCUIT APPLICATION FEATURES With Built-in Bias Resistors. Simplify Circuit Design. Reduce a Quantity of Parts and Manufacturing Process.

文件：69.41 Kbytes 页数：6 Pages

KEC

KEC(Korea Electronics)

EPITAXIAL PLANAR NPN TRANSISTOR (SWITCHING, INTERFACE CIRCUIT AND DRIVER CIRCUIT)

SWITCHING APPLICATION. INTERFACE CIRCUIT AND DRIVER CIRCUIT APPLICATION FEATURES ● With Built-in Bias Resistors. ● Simplify Circuit Design. ● Reduce a Quantity of Parts and Manufacturing Process.

文件：69.89 Kbytes 页数：6 Pages

KEC

KEC(Korea Electronics)

NPN (FM RADIO RF AMP, MIX, CONV, OSC, IF AMP)

FM RADIO RF AMP, MIX, CONV, OSC , IF AMP High Current Gain Banwidth Product ft= 250MHz(Typ)

文件：71.67 Kbytes 页数：2 Pages

Samsung

三星