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FM3783
FM3783 is a low-power primary side feedback (PSR) switching power supply chip that integrates high-power BJT transistors, suitable for isolated, high-efficiency, low-power portable device charger applications.
FM3783 adopts unique primary feedback control technology with constant current and voltage function, as well as unique light load frequency modulation technology to reduce the chip's own power consumption under light load and achieve efficient application.
FM3783 has output line loss compensation technology to ensure sufficient output power under high current.
FM3783 adopts a compact SOP-7 package
FM3783 adopts unique primary feedback control technology with constant current and voltage function, as well as unique light load frequency modulation technology to reduce the chip's own power consumption under light load and achieve efficient application.
FM3783 has output line loss compensation technology to ensure sufficient output power under high current.
FM3783 adopts a compact SOP-7 package
FM3873 Description：
FM3783 is a low-power primary side feedback (PSR) switching power supply chip that integrates high-power BJT transistors, suitable for isolated, high-efficiency, low-power portable device charger applications.
FM3783 adopts unique primary feedback control technology with constant current and voltage function, as well as unique light load frequency modulation technology to reduce the chip's own power consumption under light load and achieve efficient application.
FM3783 has output line loss compensation technology to ensure sufficient output power under high current.
In addition, FM3783 also integrates over temperature protection, VCC undervoltage protection, output overvoltage protection, C-pole open circuit protection and other technologies.
FM3783 adopts a compact SOP-7 package, which facilitates system design and wiring.
FM3873 characteristic：
Integrated high-power BJT transistor
High precision constant voltage and constant current control
Standby power consumption is less than 75MW
Output short circuit protection
Output overvoltage protection
Input undervoltage protection
Over temperature protection
Original feedback: There are few peripheral components
SOP-7 Packaging
FM3873 Typical application circuit diagram：
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FM3873 Pin distribution：
FM3873 Pin definition：
FM3873 Functional Block Diagram：
FM3873 Packaging diagram：
FM3783 is a low-power primary side feedback (PSR) switching power supply chip that integrates high-power BJT transistors, suitable for isolated, high-efficiency, low-power portable device charger applications.
FM3783 adopts unique primary feedback control technology with constant current and voltage function, as well as unique light load frequency modulation technology to reduce the chip's own power consumption under light load and achieve efficient application.
FM3783 has output line loss compensation technology to ensure sufficient output power under high current.
In addition, FM3783 also integrates over temperature protection, VCC undervoltage protection, output overvoltage protection, C-pole open circuit protection and other technologies.
FM3783 adopts a compact SOP-7 package, which facilitates system design and wiring.
FM3873 characteristic：
Integrated high-power BJT transistor
High precision constant voltage and constant current control
Standby power consumption is less than 75MW
Output short circuit protection
Output overvoltage protection
Input undervoltage protection
Over temperature protection
Original feedback: There are few peripheral components
SOP-7 Packaging
FM3873 application：
Chargers and adapters for portable devices such as mobile phones
LED driver power supply
Other auxiliary power sources
FM3783AA is suitable for 5V 2.1A scheme and meets Level 6 energy efficiency standards
FM3783BA is suitable for 5V 2.4A scheme and meets Level 6 energy efficiency standards
LED driver power supply
Other auxiliary power sources
FM3783AA is suitable for 5V 2.1A scheme and meets Level 6 energy efficiency standards
FM3783BA is suitable for 5V 2.4A scheme and meets Level 6 energy efficiency standards
FM3873 Typical application circuit diagram：
FM3873 Pin distribution：
FM3873 Pin definition：
FM3873 Functional Block Diagram：
FM3873 Packaging diagram：
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