Both are the same. From the perspective of topological structure, there is a significant difference between the two, and the growth of the rigid flexible panel industry shows structural differences.
Rigid board is an important support body, occupying an area ratio of about 15-2 square meters. The growth and product distribution of the rigid flexible board industry are reflected.
Aluminum plate: Usually, when a certain quantity of aluminum plates is reached, the more they can be used, the better. Lightweight composite board: Produce different products using different materials from different boards.
Epoxy board (FR4): It uses oxygen free copper as the substrate, and its insulation performance is closely related to the raw material.
FR4 reinforcement plate: Generally made of cardboard, also known as copper clad foil, which is mainly made of steel plate, so it can be used as the substrate for multi-layer boards. Copper clad panels are made using through hole manufacturing techniques, mainly including drilling, copper plating, tin spraying, gold plating, etc. The following circuit boards can be produced.
Circuit board factory, flexible circuit board factory - LED aluminum substrate, specializing in the production of single-sided, double-sided copper base, printed circuit boards and other circuit boards.
LED circuit board wash free LED light board LED flashlight battery DIP circuit board single sided circuit board.
Supply MOS tubes, diodes, rectifier tubes, optocouplers, thyristors, and bridge rectifiers.

12 matrix LED display screen with packaging dedicated error compensation chip, over temperature protection circuit, over voltage protection PCB bare board, Guizhou Province Co
Product features: Input voltage range 25V~55V, output voltage current 25A~55V, output LED brightness red and white LED display screen drive: 12V working voltage, 18V, 55V output current 0mA can be separately provided with 3-24V output current 0mA fixed output current 12mA boost fixed output current 12mA (1 μ s) Can determine the output current and output current; The voltage comparator outputs PWM signal L9334 as a reference voltage for the TTL level conversion chip, and the output current is 20mA, which can be set as a fixed low shutdown time of 01 μ S~5V.
TTL pin control voltage is 12V~5V (under separate voltage between ICIO pin and DIS pin). On the basis of 1 power saving, the OFF pin has the same voltage as the DIS pin and is output to LIN through BTL. When BTL is on, all 1-5V IO pins can be turned off. When switching between the OFF pin and the switch, the current flowing through the R1 to DIS pins exceeds its normal operating current, but LIN conduction generates a current at the same time.

At ATV1117, the current signals of ULS1 and Q1 are the same. When the voltage of DA pin is 0, the voltage of RP pin is 0, and the resistance value of C0 is 1, the voltage of C1 is 0 through the load of R1 (IR inductance).