Knowledge about PCB board of mobile power supply?

1. Due to the conduction and insulation of the carrier circuit, the integrated circuit can work normally. 2.2 The thicker it is. The better the conductivity of PCB wires, the greater the line width and line spacing, the smaller the interference and the larger the vias. 3. Plastic substrates, halogen-free substrates,

Its surface has 1 oz copper surface [used to produce inner layer] reinforced material (glass fiber cloth

Copper-free substrate

. ), PP[ dielectric layer]

, copper foil

[Copper plating on the outer layer is beneficial to copper ion adsorption]

4. It depends on the scheme and circuit.

5. Stability is determined by some boosting and stabilizing IC in the scheme, followed by the maximum discharge current.

6. Charging has nothing to do with main control IC or battery protection IC or its circuit, and output has nothing to do with IC main control or booster IC or its circuit.

7. The size of the motherboard is customized for the appearance mechanism, and it is also related to the size of components in the scheme. Motherboard cannot be universal. For example, parallel imports 18650 can't use the motherboard with series power supply.

Generally, it is suitable for the motherboard with parallel batteries, and countless 18650 batteries can be connected in parallel.

8.( 1) copper-clad phenolic paper laminate

(2) Copper-clad phenolic glass cloth laminate

(3) Copper-clad PTFE laminate

(4) Copper-clad epoxy glass cloth laminate

(5) Soft polyester copper-clad film

Copper clad laminate is usually used in the following ways:

FR- 1

-Phenolic cotton paper, commonly known as bakelite (more economical than FR-2).

FR-2

-Phenolic tissue paper,

FR-3

-Cotton paper (cotton

Paper), epoxy resin

FR-4── Glass cloth (woven

Glass), epoxy resin

FR-5

-Glass cloth and epoxy resin

FR-6

-Frosted glass and polyester fiber

G- 10

-Glass cloth and epoxy resin

CEM- 1

-Cotton paper and epoxy resin (flame retardant)

CEM-2

-Cotton paper and epoxy resin (non-flame retardant)

CEM-3

-Glass cloth and epoxy resin

CEM-4

-Glass cloth and epoxy resin

CEM 5

-Polyester glass cloth

own

── aluminum nitride

sic

── Silicon carbide