Расчет бутстрепного конденсатора., Как делается? Опции

[eXeC001er]

Читал аппноты от IR. Считал но почему то емкость получается порядка 10 мкФ. а на схемах в инете смотрю кондюк этот всего сотни нФ.

[eXeC001er]

документ:
DT98-2a - Bootstrap Component Selection For Control IC’s - Jonathan Adams
цитата:
IMPORTANT NOTE: The Cbs Capacitor value obtained from the above equation EQ(2) is the absolute minimum required, however due to the nature of the bootstrap circuit operation, a low value capacitor can lead to overcharging, which could in turn damage the IC. Therefore to minimize the risk of overcharging and further reduce ripple on the Vbs voltage the Cbs value obtained from the above equation should be should be multiplied by a factor of 15 (rule of thumb).