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What is PCB in LED bulb?
PCB aluminum substrate (metal base heat sink includes aluminum substrate, copper substrate, iron substrate) is a metal base printed board, which has good thermal conductivity, electrical insulation performance and mechanical processing performance.
PCB: (PrintedCircuitBoard), the Chinese name is printed circuit board, also known as mulit-wiring printed board and stamped printed wiring board. It is an important electronic component, a support for electronic components, and a provider of electrical connections for electronic components . Also called PCBA. Because it is produced by electronic printing, it is called custom pcb fabrication.
Common LED lamp driver PCB functions
1. Simple LED lamp driving circuit board with capacitive resistance step-down, rectification and filtering methods.
2. LED constant voltage driver board.
3. LED constant current source driver board.
Summary: LED lamp beads need LED drive circuit, general LED drive circuit has constant voltage drive, constant current drive, PWM drive, etc. This is the function of the small LED light circuit board.