FAN6754 is a PWM controller introduced by Fairchild company. It has green mode, frequency hopping, constant power limit and other functions, which can meet stringent standby power regulations. This application note explains how to use FAN6754 to replace SG6742. Although the pin configuration of the two devices is the same, FAN6754 has higher efficiency and better performance, so some external components need to be replaced when replaced.
The document provides a design guideline for replacing the older SG6742 PWM controller with the newer FAN6754. It highlights that while both devices share the same pin configuration allowing for PCB layout compatibility without changes, functional improvements in the FAN6754 necessitate adjustments to several external components.
| Operating Current | 1.7mA |
|---|---|
| Maximum Duty Cycle | 90% |
| Gate Drive Clamping Voltage | 13V |
| Soft Start Time | 8ms |
Yes, because these two devices have the same pin configuration and replacement can be achieved without PCB layout changes.
The device allows for less than 100mW standby power consumption for most designs due to reduced operating current.