Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

FQPPF9N50C Datenblatt(PDF) 2 Page - Fairchild Semiconductor

Teilenummer FQPPF9N50C
Bauteilbeschribung  PFCPWM Combination Controller
Download  17 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FQPPF9N50C Datenblatt(HTML) 2 Page - Fairchild Semiconductor

  FQPPF9N50C Datasheet HTML 1Page - Fairchild Semiconductor FQPPF9N50C Datasheet HTML 2Page - Fairchild Semiconductor FQPPF9N50C Datasheet HTML 3Page - Fairchild Semiconductor FQPPF9N50C Datasheet HTML 4Page - Fairchild Semiconductor FQPPF9N50C Datasheet HTML 5Page - Fairchild Semiconductor FQPPF9N50C Datasheet HTML 6Page - Fairchild Semiconductor FQPPF9N50C Datasheet HTML 7Page - Fairchild Semiconductor FQPPF9N50C Datasheet HTML 8Page - Fairchild Semiconductor FQPPF9N50C Datasheet HTML 9Page - Fairchild Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 2 / 17 page
background image
AN-8027
© 2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.0 • 8/26/09
2
Functional Description
Gain Modulator
The gain modulator is the key block for PFC stage because
it provides the reference to the current control error
amplifier for the input current shaping, as shown in Figure
2. The output current of gain modulator is a function of VEA,
IAC , and VRMS. The gain of the gain modulator is given in
the datasheet as a ratio between IMO and IAC with a given
VRMS when VEA is saturated to HIGH. The gain is inversely
proportional to VRMS
2, as shown in Figure 3, to implement
line feed-forward. This automatically adjusts the reference
of current control error amplifier according to the line
voltage such that the input power of PFC converter is not
changed with line voltage.
ISENS
E
IA
C
VRMS
VEA
2
(0.7)
(0.7)
MO
AC
EA
AC
MAX
RMS
EA
IG I
KV
I
VV
=⋅
⋅−
=⋅
IEA
R
M
R
M
Gain
Modulator
R
RMS1
R
RMS2
R
RMS3
C
RMS1
C
RMS2
R
IAC
I
AC
V
IN
I
L
x
2
k
Figure 2. Gain Modulator Block
V
RMS
V
RMS-UVP
2
1
RMS
G
V
Figure 3. Modulation Gain Characteristics
To sense the RMS value of the line voltage, an averaging
circuit with two poles is typically employed, as shown in
Figure 2. The voltage of VRMS pin in normal PFC
operation is given as:
3
12
3
2
2
π
=⋅
++
RMS
RMS
LINE
RMS
RMS
RMS
R
VV
RR
R
(1)
where VLINE is RMS value of line voltage.
However, once PFC stops switching operation, the junction
capacitance of bridge diode is not discharged and VIN of
Figure 2 is clamped at the peak of the line voltage. Then,
the voltage of VRMS pin is given by:
3
12
3
2
NS
RMS
RMS
LINE
RMS
RMS
RMS
R
VV
RR
R
=
++
(2)
Therefore, the voltage divider for VRMS should be
designed considering the brownout protection trip point
and minimum operation line voltage.
PFC runs
PFC stops
V
IN
V
RMS
Figure 4. VRMS According to the PFC Operation
The rectified sinusoidal signal is obtained by the current
flowing into the IAC pin. The resistor RIAC should be large
enough to prevent saturation of the gain modulator as:
.
2
159
MAX
LINE BO
IAC
V
GA
R
μ
⋅<
(3)
where VLINE.BO is the line voltage that trips brownout
protection, GMAX is the maximum modulator gain when VRMS
is 1.08V (which can be found in the datasheet), and 159µA is
the maximum output current of the gain modulator.
Current and Voltage Control of Boost Stage
As shown in Figure 5, the FAN480X employs two control
loops for power factor correction: a current control loop
and a voltage control loop. The current control loop shapes
inductor current, as shown in Figure 6, based on the
reference signal obtained at the IAC pin as:
1
LCS
MO
M
AC
M
I RI
R
I
G R
=⋅
=
⋅ ⋅
(4)


Ähnliche Teilenummer - FQPPF9N50C

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Fairchild Semiconductor
FQP10N20 FAIRCHILD-FQP10N20 Datasheet
787Kb / 9P
   200V N-Channel MOSFET
FQP10N20 FAIRCHILD-FQP10N20 Datasheet
774Kb / 8P
   200V N-Channel MOSFET
FQP10N20 FAIRCHILD-FQP10N20 Datasheet
627Kb / 8P
   200V LOGIC N-Channel MOSFET
FQP10N20C FAIRCHILD-FQP10N20C Datasheet
875Kb / 10P
   200V N-Channel MOSFET
logo
Inchange Semiconductor ...
FQP10N20C ISC-FQP10N20C Datasheet
319Kb / 2P
   isc N-Channel MOSFET Transistor
More results

Ähnliche Beschreibung - FQPPF9N50C

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Fairchild Semiconductor
FAN4800AU FAIRCHILD-FAN4800AU Datasheet
987Kb / 20P
   PFC/ PWM Controller Combination
FAN4800A FAIRCHILD-FAN4800A_09 Datasheet
647Kb / 24P
   PFC/PWM Controller Combination
FAN4800AS FAIRCHILD-FAN4800AS Datasheet
583Kb / 19P
   PFC/PWM Controller Combination
FAN4800AUN FAIRCHILD-FAN4800AUN Datasheet
987Kb / 20P
   PFC/ PWM Controller Combination
FAN4800A FAIRCHILD-FAN4800A Datasheet
659Kb / 24P
   PFC/PWM Controller Combination
FAN3988IL6X-F113 FAIRCHILD-FAN3988IL6X-F113 Datasheet
992Kb / 21P
   PFC/ PWM Controller Combination
logo
Texas Instruments
UCC28500-12 TI1-UCC28500-12 Datasheet
914Kb / 35P
[Old version datasheet]   BiCMOS PFC/PWM COMBINATION CONTROLLER
UCC28521 TI1-UCC28521_16 Datasheet
790Kb / 34P
[Old version datasheet]   ADVANCED PFC/PWM COMBINATION CONTROLLER
UCC28500 TI-UCC28500 Datasheet
571Kb / 31P
[Old version datasheet]   BICMOS PFC/PWM COMBINATION CONTROLLER
UCC18500 TI-UCC18500 Datasheet
91Kb / 8P
[Old version datasheet]   BiCMOS PFC/PWM Combination Controller
More results


Html Pages

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


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
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