# Electronics Handbook/Components/Transformers

## Transformer

Transformer is an electromagnetic component consists of two coils wrap around a square magnetic material that has the capability of Step up, Step down and Buffer the voltage

## Characteristic

$V_S = V_P \frac{N_S}{N_P}$
• Step Up Voltage when $\frac{N_S}{N_P} > 1$
• Step Down Voltage when $\frac{N_S}{N_P} < 1$
• Buffer Voltage when $\frac{N_S}{N_P} = 1$

## Summary

Component Transformer
Symbol
Construction
$\frac{V_o}{V_i}$ $\frac{V_o}{V_i} = \frac{N_2}{N_1}$
Function Step Up $V_o > V_i , N_2 > N_1$
Step Down$V_o < V_i , N_2 < N_1$
Buffer $V_o = V_i , N_2 = N_1$