Fairchild Manuals

This is the PFCM design guide of FAIRCHILD SEMICONDUCTOR, which introduces the PFCM system configuration, protection circuits, design examples, experimental results.

FAN4810 is a controller IC for PFC power supply design. This application note describes the theory of operation and step-by-step process to design a high performance Power Factor Corrected (PFC) power supply using the FAN4810 controller IC.

This application note shows the step-by-step process to design a high-performance supply. The equations shown in this document can also be used for different output voltages and total power. The complete power supply circuits shown in Figures 6 and 7 demonstrate the FAN4800’s ability to manage high output power while complying with international requirements regarding AC line quality. The PFC section provides 380VDC to a dual-transistor current-mode forward converter. The output of the converter delivers +12V at up to 8.4 amps. The circuit operates from 85 to 265VAC with both power sections switching at 100kHz. The FAN4800 is initialized once C12 is charged to 13V through R27 and R28. PFC switching action boosts the voltage on C5 to 380V via L1’s inductance. T2 then supplies a well-regulated 13V for the FAN4800 from its secondary winding. T2’s primary-to-secondary turns ratio (NPRI / NSEC) is 18.8:1. For proper circuit operation, high-frequency bypassing with low-ESR ceramic or film capacitors on VCC and VREF is provided. Orderly PFC operation upon start-up is achieved when D2 quick charges the boost capacitor to the peak AC line voltage before the boost switch Q1 is turned on. This ensures the boost inductor current is zero before IEAO RAMP2.

AN-8026 / FEB301_FAN9611 / FAN9612 User Guide is the user guide for FAN9611 / FAN9612 400W evaluation board for interleaved boundary-conduction mode power factor corrected supply.

Introduction to the structure and working principle of power MOSFETs and its applications

This paper presents a new PSPICE subcircuit that can simulate power MOSFETs over a wide range of temperatures. The subcircuit uses an empirical method to model MOSFET characteristics such as on-state and off-state resistance, gate equivalent series resistance, body diode effects, breakdown voltage, and capacitance for temperatures between -55oC and 175oC.

This document presents an empirical self-heating SPICE MOSFET model for vertical DMOS power MOSFETs, which accurately represents the electrical and thermal responses. This model integrates the thermal and electrical models of a VDMOS MOSFET and is independent of SPICE's global temperature definition. Existing models can be easily upgraded to self-heating models.

This document introduces the basic knowledge of MOSFET, including the history, structure, characteristics and characteristics of MOSFET

This document is the user guide for the FAN9612 400W 4-layer evaluation board, which provides an overview of the evaluation board, key features, specifications, test procedures, schematic, etc.

This application note describes how to build variable output voltage Boost PFC converters using the FAN9612 Interleaved BCM PFC controller. By adjusting the output voltage, flexible control can be achieved based on the input AC rms voltage level or the output power of the converter. The document also explains different levels of circuit design and implementation.

This document describes the features and characteristics of the FODM8061 high-speed, high noise immunity optocoupler, as well as its common usage in logic interfacing applications.

AN6016 is an application note about the LCD backlight inverter drive IC (FAN7311). The IC provides a highly efficient CCFL backlight power supply for notebook computers and other portable applications. It features small size, high efficiency, and low cost. The FAN7311 integrates various circuit blocks including feedback-controlled PWM driver stage, soft start, open lamp regulation, and UVLO protection, minimizing external parts count and reducing system cost. The FAN7311 typically consumes less than 4mA of operating current, improving overall system efficiency. It supports analog and burst dimming modes and provides open lamp regulation and protection.

The document is the User's Guide for AN-7012 FPF2100/7 Evaluation Board. It provides a description of the evaluation board, contents of the evaluation kit, specifications, and test results. The evaluation board is used to evaluate the performance of Fairchild Semiconductor FPF2100/1/2/3/4/5/6/7 smart load switches family. This family of products features controlled turn-on, fast turn-off, thermal shutdown, under voltage lock out, and current limit.

The FPF200X EVM is an Evaluation Module for Fairchild Semiconductor FPF2000 smart load switches family. The FPF200X family is a 0.7 Ω PMOS load switches with controlled turn-on, fast turn-off, and current limit. The current Limit is guaranteed for 50mA and 100mA with 1.8V to 5.5V range of input voltage. The Evaluation Module has test points for convenient access to the all pins and jumpers for setting the various load conditions along with switches for toggling the ON/OFF and configuring the ON pin polarity. The Board can be presented as a stand alone unit with a 1.8-5.5V battery for testing the basic functions.