Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

BD9018KV Datasheet(PDF) 8 Page - Rohm

Part # BD9018KV
Description  Step-down,High-efficiency Switching Regulators (Controller type)
Download  17 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BD9018KV Datasheet(HTML) 8 Page - Rohm

Back Button BD9018KV Datasheet HTML 4Page - Rohm BD9018KV Datasheet HTML 5Page - Rohm BD9018KV Datasheet HTML 6Page - Rohm BD9018KV Datasheet HTML 7Page - Rohm BD9018KV Datasheet HTML 8Page - Rohm BD9018KV Datasheet HTML 9Page - Rohm BD9018KV Datasheet HTML 10Page - Rohm BD9018KV Datasheet HTML 11Page - Rohm BD9018KV Datasheet HTML 12Page - Rohm Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 17 page
background image
Technical Note
8/16
BD9018KV
www.rohm.com
2010.02 - Rev.A
c
2010 ROHM Co., Ltd. All rights reserved.
Over current detection point
IL
L
VIN
IL
Vo
VCCCL
CL
RCL
(6) Setting the soft start time
The soft start function is necessary to prevent an inrush of coil current and output voltage overshoot at startup. The figure
below shows the relation between soft start delay time and capacitance, which can be calculated using equation (13) at
right.
0.8V(typ.)×CSS
TSS =
[sec]・・・(13)
ISS(10μA Typ.)
Fig. 19 SS capacitance vs. delay time
Recommended capacitance values are between 0.01uF and 0.1uF. There is a possibility that the overshoot is generated in
the output according to the phase compensation and the output capacity, etc. , and let me confirm it with a real machine,
please. For the case with larger capacitance, the SS-pin may not become fully discharged when the EN becomes from H
to L, which might cause the output overshoot when the EN becomes back H. Hence the discharge time (Tdis) needs to be
carefully considered.
Css × Vss_MAX
Tdis =
[sec]
Idis
The insertion of the CR filter is recommended as a noise measures because similar is thought when the noise enters the
terminal EN.
Please use high accuracy components (such as X5R) when implementing sequential startups involving other power
sources. Be sure to test the actual devices and applications to be used, since the soft start time varies, depending on input
voltage, output voltage and capacitance, coils and other characteristics.
(7) Setting over current detection values
The current limit value(ILimit)is determined by the resistance of the RCL established between CL and VCCCL.
90m
ILimit =
[A]・・・(14)
RCL
Fig. 20
Fig. 21
The current limit is an auto-recovery type. When the over current is detected, the output Duty is reduced to limit the output
current. The output voltage returns to normal when the load returns to the normal state.
Fig. 22
0.01
0.1
1
10
0.001
0.01
0.1
SS CAPACITANCE[uF]
0
1
2
3
4
5
6
01
2
3
45
6
Io[A]
Vo[V]


Similar Part No. - BD9018KV

ManufacturerPart #DatasheetDescription
logo
Power Innovations Ltd
BD901 POINN-BD901 Datasheet
115Kb / 6P
   NPN SILICON POWER DARLINGTONS
logo
Bourns Electronic Solut...
BD901 BOURNS-BD901 Datasheet
107Kb / 5P
   NPN SILICON POWER DARLINGTONS
logo
Savantic, Inc.
BD901 SAVANTIC-BD901 Datasheet
101Kb / 3P
   Silicon NPN Power Transistors
logo
Inchange Semiconductor ...
BD901 ISC-BD901 Datasheet
134Kb / 3P
   Silicon NPN Power Transistors
logo
Continental Device Indi...
BD901 CDIL-BD901 Datasheet
86Kb / 3P
   DARLINGTON PLASTIC POWER TRANSISTORS
More results

Similar Description - BD9018KV

ManufacturerPart #DatasheetDescription
logo
Rohm
BD9040FV ROHM-BD9040FV_09 Datasheet
585Kb / 19P
   Step-down,High-efficiency Switching Regulators (Controller type)
BD9011EKN ROHM-BD9011EKN_08 Datasheet
1Mb / 30P
   Step-down, High-efficiency Switching Regulators (Controller type)
BD8303MUV-E2 ROHM-BD8303MUV-E2 Datasheet
398Kb / 18P
   Step-up/down, High-efficiency Switching Regulators (Controller type)
BD8303MUV ROHM-BD8303MUV Datasheet
380Kb / 16P
   Step-up/down, High-efficiency Switching Regulators (Controller type)
logo
Linear Technology
LTC1148 LINER-LTC1148 Datasheet
384Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1148-5 LINER-LTC1148-5_15 Datasheet
247Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1149 LINER-LTC1149_15 Datasheet
333Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1159 LINER-LTC1159_15 Datasheet
290Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1148 LINER-LTC1148_04 Datasheet
237Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
LTC1148 LINER-LTC1148_15 Datasheet
247Kb / 20P
   High Efficiency Synchronous Step-Down Switching Regulators
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17


Datasheet Download

Go To PDF Page


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


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
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