Inverter: Half bridge or Full bridge

Manoj Hiwarkar85

Intellectual 730 points

Half bridge or Full bridge which is the better topology to design an inverter and why ?

over 5 years ago

0 Teng Feng over 5 years ago

TI__Genius 13660 points

Hi Manoj,

Choosing which topology mainly depends on the application. Please refer the below comparation table.

Item	Half bridge	Full bridge
Number of power switches	2	4
Driver circuit	Easy	Difficulty
Output power when the switch current is equal	Po	2*Po
Switch current when output power is equal	2*Io	Io
The primary winding of the transformer	Wider	More turns
Capability against unbalance	stronger	common
Cost	low	high
application	High power	Medium power

Regards,

Teng

0 Manoj Hiwarkar85 over 5 years ago in reply to Teng Feng

Intellectual 730 points

High power means in what range?

0 Teng Feng over 5 years ago in reply to Manoj Hiwarkar85

TI__Genius 13660 points

Hi Manoj,

Please consider the current range of power switch. Generally, half bridge is used in the power from several kW to a dozen kW. full bridge is used in the power from several kW to several hundreds kW.

Regards,

Teng

Power management

Power management forum

Inverter: Half bridge or Full bridge