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

X  

ML4800IP Fiches technique(PDF) 1 Page - Fairchild Semiconductor

No de pièce ML4800IP
Description  Power Factor Correction and PWM Controller Combo
Download  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

ML4800IP Fiches technique(HTML) 1 Page - Fairchild Semiconductor

  ML4800IP Datasheet HTML 1Page - Fairchild Semiconductor ML4800IP Datasheet HTML 2Page - Fairchild Semiconductor ML4800IP Datasheet HTML 3Page - Fairchild Semiconductor ML4800IP Datasheet HTML 4Page - Fairchild Semiconductor ML4800IP Datasheet HTML 5Page - Fairchild Semiconductor ML4800IP Datasheet HTML 6Page - Fairchild Semiconductor ML4800IP Datasheet HTML 7Page - Fairchild Semiconductor ML4800IP Datasheet HTML 8Page - Fairchild Semiconductor ML4800IP Datasheet HTML 9Page - Fairchild Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 1 / 14 page
background image
www.fairchildsemi.com
REV. 1.0.5 9/25/01
Features
• Internally synchronized leading-edge PFC and trailing-
edge PWM in one IC
• TriFault Detect™ for UL1950 compliance and enhanced
safety
• Slew rate enhanced transconductance error amplifier for
ultra-fast PFC response
• Low power: 200µA startup current, 5.5mA operating
current
• Low total harmonic distortion, high PF
• Reduced ripple current in storage capacitor between PFC
and PWM sections
• Average current, continuous boost leading edge PFC
• PWM configurable for current-mode or voltage mode
operation
• Current fed gain modulator for improved noise immunity
• Overvoltage and brown-out protection, UVLO, and soft
start
General Description
The ML4800 is a controller for power factor corrected,
switched mode power supplies. Power Factor Correction
(PFC) allows the use of smaller, lower cost bulk capacitors,
reduces power line loading and stress on the switching FETs,
and results in a power supply that fully complies with
IEC1000-3-2 specification. Intended as a BiCMOS version
of the industry-standard ML4824, the ML4800 includes
circuits for the implementation of leading edge, average
current, “boost” type power factor correction and a trailing
edge, pulse width modulator (PWM). It also includes a
TriFault Detect™ function to help ensure that no unsafe
conditions will result from single component failure in the
PFC. Gate-drivers with 1A capabilities minimize the need
for external driver circuits. Low power requirements improve
efficiency and reduce component costs.
An over-voltage comparator shuts down the PFC section in
the event of a sudden decrease in load. The PFC section also
includes peak current limiting and input voltage brownout
protection. The PWM section can be operated in current or
voltage mode, at up to 250kHz, and includes an accurate
50% duty cycle limit to prevent transformer saturation.
Block Diagram
15
VEAO
IEAO
VFB
IAC
VRMS
ISENSE
RAMP 1
OSCILLATOR
OVP
PFC ILIMIT
UVLO
VREF
PULSE WIDTH MODULATOR
POWER FACTOR CORRECTOR
TRI-FAULT
2.5V
+
-
-
+
16
2
4
3
7.5V
REFERENCE
14
VCC
13
VCC
VEA
7
-
+
IEA
1
+
-
+
-
+
-
PFC OUT
12
S
R
Q
Q
S
R
Q
Q
2.75V
0.5V
-1V
RAMP 2
8
PWM OUT
11
S
R
Q
Q
VDC
6
SS
5
DC ILIMIT
9
VCC
DUTY CYCLE
LIMIT
-
+
1.0V
-
+
2.45V
VFB
-
+
VREF
VIN OK
GAIN
MODULATOR
VCC
1.6k
1.6k
1.25V
25
µA
-
+
DC ILIMIT
17V
ML4800
Power Factor Correction and PWM Controller
Combo


Numéro de pièce similaire - ML4800IP

FabricantNo de pièceFiches techniqueDescription
logo
Fairchild Semiconductor
ML4800IP FAIRCHILD-ML4800IP Datasheet
154Kb / 14P
   Power Factor Correction and PWM Controller Combo
More results

Description similaire - ML4800IP

FabricantNo de pièceFiches techniqueDescription
logo
Fairchild Semiconductor
ML4824 FAIRCHILD-ML4824_03 Datasheet
105Kb / 15P
   Power Factor Correction and PWM Controller Combo
logo
Micro Linear Corporatio...
ML4824 MICRO-LINEAR-ML4824 Datasheet
262Kb / 16P
   Power Factor Correction and PWM Controller Combo
logo
Fairchild Semiconductor
ML4800 FAIRCHILD-ML4800 Datasheet
154Kb / 14P
   Power Factor Correction and PWM Controller Combo
logo
Micro Linear Corporatio...
ML4804 MICRO-LINEAR-ML4804 Datasheet
246Kb / 14P
   Power Factor Correction and PWM Controller Combo
logo
Fairchild Semiconductor
ML4804 FAIRCHILD-ML4804 Datasheet
145Kb / 14P
   Power Factor Correction and PWM Controller Combo
ML4824 FAIRCHILD-ML4824 Datasheet
150Kb / 16P
   Power Factor Correction and PWM Controller Combo
ML4824CS2X FAIRCHILD-ML4824CS2X Datasheet
109Kb / 15P
   Power Factor Correction and PWM Controller Combo
logo
Micro Linear Corporatio...
ML4819 MICRO-LINEAR-ML4819 Datasheet
290Kb / 15P
   Power Factor and PWM Controller Combo
logo
Linear Technology
LT1509 LINER-LT1509_15 Datasheet
301Kb / 16P
   Power Factor and PWM Controller
LT1508 LINER-LT1508_15 Datasheet
311Kb / 16P
   Power Factor and 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