Electronic Components Datasheet Search |
|
BD9540EFV Datasheet(PDF) 8 Page - Rohm |
|
BD9540EFV Datasheet(HTML) 8 Page - Rohm |
8 / 18 page BD9540EFV Technical Note 8/17 www.rohm.com 2009.04 - Rev.B © 2009 ROHM Co., Ltd. All rights reserved. ● Explanation of Operation The BD9540EFV is a 2ch switching regulator controller incorporating ROHM’s proprietary H 3RegTM CONTROLLA control system. When VOUT drops due to a rapid load change, the system quickly restores VOUT by extending the TON time interval. H 3RegTM control (Normal operation) (VOUT drops due to a rapid load change) ● Timing Chart ・ Soft Start Function Rush current: IIN = Co×VOUT 1ms [A] tON= VOUT VIN × 1 f [sec]・・・(1) ・・・ (2) When FB falls below the threshold voltage (REF), a drop is detected, activating the H 3RegTM CONTROLLA system. HG output is determined by the formula above. (See P13) LG output operates until FB voltage falls below REF voltage after HG becomes OFF. When FB (VOUT) drops due to a rapid load change, and the voltage remains below REF after the programmed tON time interval has elapsed, the system quickly restores VOUT by extending the tON time, improving transient response. Soft start is utilized when the EN pin is set high. Current control takes effect at startup, enabling a moderate “ramping start” on the output voltage. Soft start time is 1msec. And input current is determined via formula (2) below. (Co: All capacitors connected with VOUT) FB REF HG LG EN IIN 1msec VOUT FB REF HG Io LG |
Similar Part No. - BD9540EFV |
|
Similar Description - BD9540EFV |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |