Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
L6388D013TR Datasheet(PDF) 6 Page - STMicroelectronics |
|
L6388D013TR Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 11 page L6388 6/11 has to be long enough to charge the capacitor. The bootstrap driver introduces a voltage drop due to the DMOS RDSON (typical value: 125 Ohm). At low fre- quency this drop can be neglected. Anyway increasing the frequency it must be taken in to account. The following equation is useful to compute the drop on the bootstrap DMOS: where Qgate is the gate charge of the external power MOS, Rdson is the on resistance of the bootstrap DMOS, and Tcharge is the charging time of the bootstrap capacitor. For example: using a power MOS with a total gate charge of 30nC the drop on the bootstrap DMOS is about 1V, if the Tcharge is 5µs. In fact: Vdrop has to be taken into account when the voltage drop on CBOOT is calculated: if this drop is too high, or the circuit topology doesn't allow a sufficient charging time, an external diode can be used. Figure 8. Bootstrap Driver. V drop I ch e arg Rdson V drop → Q gate T ch e arg --------------------R dson == V drop 30nC 5 µs --------------- 125 Ω 0.8V ∼ ⋅ = TO LOAD H.V. HVG a b LVG HVG LVG CBOOT TO LOAD H.V. CBOOT DBOOT VBOOT VS VS VOUT VBOOT VOUT |
Número de pieza similar - L6388D013TR |
|
Descripción similar - L6388D013TR |
|
|
Enlace URL |
Política de Privacidad |
ALLDATASHEET.ES |
¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |