ZHCSN39A February 2020 – November 2021 LM61480 , LM61495 , LM62460
PRODUCTION DATA
The choice of switching frequency is a compromise between conversion efficiency and overall solution size. Lower switching frequency implies reduced switching losses, usually resulting in less power dissipated in the IC. Lower power dissipated in the IC results in higher system efficiency and a lower IC temperature. However, higher switching frequency allows the use of smaller inductors and output capacitors, hence, a more compact design. Many applications require that the AM band be avoided. These applications tend to operate at either 400 kHz below the AM band, or 2.2 MHz above the AM band. In this example, 400 kHz is chosen.