Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

FAN6520BIM Datasheet(PDF) 11 Page - Fairchild Semiconductor

Part # FAN6520BIM
Description  Single Synchronous Buck PWM Controller
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN6520BIM Datasheet(HTML) 11 Page - Fairchild Semiconductor

Back Button FAN6520BIM Datasheet HTML 6Page - Fairchild Semiconductor FAN6520BIM Datasheet HTML 7Page - Fairchild Semiconductor FAN6520BIM Datasheet HTML 8Page - Fairchild Semiconductor FAN6520BIM Datasheet HTML 9Page - Fairchild Semiconductor FAN6520BIM Datasheet HTML 10Page - Fairchild Semiconductor FAN6520BIM Datasheet HTML 11Page - Fairchild Semiconductor FAN6520BIM Datasheet HTML 12Page - Fairchild Semiconductor FAN6520BIM Datasheet HTML 13Page - Fairchild Semiconductor FAN6520BIM Datasheet HTML 14Page - Fairchild Semiconductor  
Zoom Inzoom in Zoom Outzoom out
 11 / 14 page
background image
11
www.fairchildsemi.com
FAN6520B Rev. 1.0.3
Most MOSFET vendors specify QGD and QGS. QG(SW)
can be determined as: QG(SW) = QGD + QGS – QTH
where QTH is the gate charge required to get the MOS-
FET to its threshold (VTH). For the high-side MOSFET,
VDS = VIN, which can be as high as 20V in a typical por-
table application. Care should also be taken to include
the delivery of the MOSFET’s gate power (PGATE) in cal-
culating
the
power
dissipation
required
for
the
FAN6520B:
PGATE = QG × VCC × FSW
(17)
where QG is the total gate charge to reach VCC.
Low-Side Losses
Q2, however, switches on or off with its parallel shottky
diode conducting, therefore VDS ≈ 0.5V. Since PSW is
proportional to VDS, Q2’s switching losses are negligible
and we can select Q2 based on RDS(ON) only.
Conduction losses for Q2 are given by:
PCOND = (1-D) × IOUT
2
× R
DS(ON)
(18)
where RDS(ON) is the RDS(ON) of the MOSFET at the
highest operating junction temperature and
is the minimum duty cycle for the converter.
Since DMIN < 20% for portable computers, (1-D) ≈ 1
produces a conservative result, further simplifying the
calculation.
The maximum power dissipation (PD(MAX) ) is a function
of the maximum allowable die temperature of the low-
side MOSFET, the
θ
J-A, and the maximum allowable
ambient temperature rise:
θ
J-A, depends primarily on the amount of PCB area that
can be devoted to heat sinking (see Fairchild app note
AN-1029 for SO-8 MOSFET thermal information).
t
s
Q
GSW
()
I
DRIVER
---------------------
Q
GSW
()
VCC
V
SP
R
DRIVER
R
GATE
+
------------------------------------------------


------------------------------------------------------
≈≈
(16)
D
V
OUT
V
IN
--------------
=
P
D MAX
()
T
J MAX
() TA MAX
()
θ
JA
-------------------------------------------------
=
(19)


Similar Part No. - FAN6520BIM

ManufacturerPart #DatasheetDescription
logo
Fairchild Semiconductor
FAN6520A FAIRCHILD-FAN6520A Datasheet
580Kb / 15P
   Single Synchronous Buck PWM Controller
FAN6520A FAIRCHILD-FAN6520A Datasheet
482Kb / 15P
   Single Synchronous Buck PWM Controller
FAN6520AIM FAIRCHILD-FAN6520AIM Datasheet
580Kb / 15P
   Single Synchronous Buck PWM Controller
FAN6520AIM FAIRCHILD-FAN6520AIM Datasheet
482Kb / 15P
   Single Synchronous Buck PWM Controller
FAN6520AIMX FAIRCHILD-FAN6520AIMX Datasheet
580Kb / 15P
   Single Synchronous Buck PWM Controller
More results

Similar Description - FAN6520BIM

ManufacturerPart #DatasheetDescription
logo
Fairchild Semiconductor
FAN6520A FAIRCHILD-FAN6520A_06 Datasheet
482Kb / 15P
   Single Synchronous Buck PWM Controller
logo
Taiwan Semiconductor Co...
TS3404 TSC-TS3404_1 Datasheet
379Kb / 10P
   Single Synchronous Buck PWM Controller
logo
Fairchild Semiconductor
FAN6520A FAIRCHILD-FAN6520A Datasheet
580Kb / 15P
   Single Synchronous Buck PWM Controller
logo
Richtek Technology Corp...
RT8238B RICHTEK-RT8238B Datasheet
219Kb / 15P
   Single Synchronous Buck PWM Controller
logo
Taiwan Semiconductor Co...
TS3405 TSC-TS3405 Datasheet
409Kb / 10P
   Single Synchronous Buck PWM Controller
logo
Richtek Technology Corp...
RT8228A RICHTEK-RT8228A Datasheet
201Kb / 15P
   Single Synchronous Buck PWM Controller
October 2021
logo
BCD Semiconductor Manuf...
AP3586A,B,C BCDSEMI-AP3586A,B,C Datasheet
624Kb / 17P
   Single Phase Synchronous Buck PWM Controller
AP3581A,B,C BCDSEMI-AP3581A,B,C Datasheet
575Kb / 13P
   Single Phase Synchronous Buck PWM Controller
logo
Richtek Technology Corp...
RT8120 RICHTEK-RT8120_V01 Datasheet
223Kb / 17P
   Single-Phase Synchronous Buck PWM Controller
logo
Diodes Incorporated
AP3581A DIODES-AP3581A Datasheet
756Kb / 13P
   SINGLE PHASE SYNCHRONOUS BUCK PWM CONTROLLER
November 2018 Rev. 2 - 4
More results


Html Pages

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


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   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