Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

FAN102MY Fiches technique(PDF) 10 Page - Fairchild Semiconductor

No de pièce FAN102MY
Description  Primary-Side-Control PWM Controller
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FAN102MY Fiches technique(HTML) 10 Page - Fairchild Semiconductor

Back Button FAN102MY Datasheet HTML 6Page - Fairchild Semiconductor FAN102MY Datasheet HTML 7Page - Fairchild Semiconductor FAN102MY Datasheet HTML 8Page - Fairchild Semiconductor FAN102MY Datasheet HTML 9Page - Fairchild Semiconductor FAN102MY Datasheet HTML 10Page - Fairchild Semiconductor FAN102MY Datasheet HTML 11Page - Fairchild Semiconductor FAN102MY Datasheet HTML 12Page - Fairchild Semiconductor FAN102MY Datasheet HTML 13Page - Fairchild Semiconductor FAN102MY Datasheet HTML 14Page - Fairchild Semiconductor  
Zoom Inzoom in Zoom Outzoom out
 10 / 14 page
background image
© 2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN102 Rev. 1.0.1
10
Functional Description
The proprietary topology of FAN102 enables most
simplified circuit design for battery charger applications.
Without secondary feedback circuitry, the CV and CC
control are achieved accurately. As shown in Figure 24,
with the frequency-hopping PWM operation, EMI
problems can be solved by using minimized filter
components. FAN102 also provides many protection
functions. The VDD pin is equipped with over-voltage
protection and under-voltage lockout. Pulse-by-pulse
current limiting and CC control ensure over-current
protection at heavy loads. The GATE output is clamped
at 15V to protect the external MOSFET from over-
voltage damage. Also, the internal over-temperature-
protection function shuts down the controller with latch
when overheated.
Figure 24. Frequency Hopping
Startup Current
The startup current is 10µA. Low startup current allows
a startup resistor with a high resistance and a low-
wattage to supply the startup power for the controller. A
1.5MΩ, 0.25W, startup resistor and a 10µF/25V VDD
hold-up capacitor are sufficient for an AC-to-DC power
adapter with a wide input range (100VAC to 240VAC)
Operating Current
The operating current has been reduced to 3.5mA. The
low operating current results in higher efficiency and
reduces the VDD hold-up capacitance requirement.
Once FAN102 enters “deep“ green mode, the operating
current is reduced to 1.2mA, which assists the power
supply in meeting the power conservation requirements.
Green-Mode Operation
Figure 25 shows the characteristics of the PWM
frequency vs. the output voltage of the error amplifier
(VCOMV). The FAN102 uses the positive, proportional,
output load parameter (VCOMV) as an indication of the
output load for modulating the PWM frequency. In heavy
load conditions, the PWM frequency is fixed at 42KHz.
Once VCOMV is lower than VN, the PWM frequency starts
to linearly decrease from 42KHz to 550Hz, providing
further power savings and meeting international power
conservation requirements.
Figure 25. Green Mode Frequency vs. VCOMV
Constant Voltage (CV) and Constant
Current (CC) Operation
An innovative technique allows the FAN102 to
accurately achieve CV / CC characteristic output without
secondary-side voltage or current-feedback circuitry. A
feedback signal for CV / CC operation from the reflected
voltage across the primary auxiliary winding is
proportional to secondary winding, so provides the
controller the feedback signal from secondary side and
achieves constant voltage output property. In constant-
current-output operation, this voltage signal is detected
and examined by the precise constant current regulation
controller, which then determines the on-time of the
MOSFET to control input power and provide constant
current output property. With feedback voltage VCS
across the current-sense resistor, the controller can
obtain input power of power supply. Therefore, the
region of constant current output operation can be
adjusted by the current-sense resistor.
Temperature Compensation
Built-in temperature compensation provides better
constant
voltage
regulation at
different ambient
temperatures. This internal compensation current is a
positive temperature coefficient (PTC) current that can
compensate the forward-voltage drop of the secondary
diode of varying with temperature. This variation causes
output voltage rising at high temperature.
Leading-Edge Blanking (LEB)
Each time the power MOSFET switches on, a turn-on
spike occurs at the sense resistor. To avoid premature
termination of the switching pulse, a leading-edge
blanking time is built in. Conventional RC filtering can
be omitted. During this blanking period, the current-
limit comparator is disabled and cannot switch off the
gate driver.


Numéro de pièce similaire - FAN102MY

FabricantNo de pièceFiches techniqueDescription
logo
Fairchild Semiconductor
FAN102MY FAIRCHILD-FAN102MY Datasheet
974Kb / 16P
   Primary-Side-Control PWM Controller
More results

Description similaire - FAN102MY

FabricantNo de pièceFiches techniqueDescription
logo
Fairchild Semiconductor
FAN100 FAIRCHILD-FAN100 Datasheet
513Kb / 14P
   Primary-Side-Control PWM Controller
SGP100 FAIRCHILD-SGP100 Datasheet
497Kb / 14P
   Primary-side-control PWM Controller
FAN100 FAIRCHILD-FAN100_09 Datasheet
517Kb / 16P
   Primary-Side-Control PWM Controller
FAN102 FAIRCHILD-FAN102_09 Datasheet
974Kb / 16P
   Primary-Side-Control PWM Controller
logo
List of Unclassifed Man...
AS2214 ETC-AS2214 Datasheet
53Kb / 8P
   Primary Side PWM Controller
logo
Texas Instruments
UC1548 TI-UC1548 Datasheet
345Kb / 9P
[Old version datasheet]   Primary Side PWM Controller
UC1548 TI1-UC1548_08 Datasheet
372Kb / 10P
[Old version datasheet]   Primary Side PWM Controller
logo
List of Unclassifed Man...
AS2208 ETC-AS2208 Datasheet
32Kb / 6P
   Primary Side PWM Controller
logo
ON Semiconductor
FL663 ONSEMI-FL663 Datasheet
406Kb / 15P
   Primary-Side-Regulation PWM Controller
June 2015 Rev. 1.0
logo
Fairchild Semiconductor
FAN103 FAIRCHILD-FAN103 Datasheet
952Kb / 16P
   Primary-Side-Regulation PWM Controller
More results


Html Pages

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


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
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