|
|
PDF MP44011 Data sheet ( Hoja de datos )
| Número de pieza | MP44011 | |
| Descripción | Boundary-Mode PFC Controller | |
| Fabricantes | MPS | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MP44011 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
|
No Preview Available !
The Future of Analog IC Technology
DESCRIPTION
The MP44011 is a boundary-conduction–mode
PFC controller with an internal-harmonic–
injection function. It provides simple and high-
performance active power-factor correction with
minimal external components.
Compared against traditional boundary-
conduction–mode PFC controllers, the
harmonic-injection function makes the part
suitable for LED lighting applications.
In LED lighting applications with two-stage
structures, the harmonic-injection function can
effectively reduce bus capacitance between the
AC/DC and the DC/DC stage. In addition,
harmonic injection can reduce the transformer
size to save board space and BOM cost.
Also, the benefits of a harmonic-injection
function also apply to general boost or flyback
PFC applications.
The MP44011 is derived from the MP44010,
except with a harmonic-injection function.
The MP44011 is available in an 8-pin SOIC
package.
MP44011
Boundary-Mode PFC Controller
with Harmonic Injection
FEATURES
Boundary-Conduction–Mode PFC Controller
for Pre-Regulation
Reduced Bus Capacitance
Reduced Transformer Size
Internal Harmonic-Injection Function
Precise Adjustable-Output Over-Voltage
Protection
Ultra-Low Start-Up Current
Very Low Quiescent Current
On-Chip Filter for Current-Sense Pin
Disable Function
Available in SOIC-8
APPLICATIONS
LED Lighting Driver
General PFC Pre-Regulators
For MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered
Trademarks of Monolithic Power Systems, Inc.
Patents pending.
TYPICAL APPLICATION
D1
VAC
C5
T1
R9 C4
R3 D3
D2
R1
R7
C1 R5 C3
R4 R8
U1 R6
ZCS COMP FB
VIN MP44011 GATE
R10
MULT GND
CS
Q1
R2 C2
R11
D1 Vbus
C6 DC/DC
Feedback
Network
MP44011 Rev. 1.01
www.MonolithicPower.com
1/12/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
1
1 page  
MP44011 – BOUNDARY-MODE PFC CONTROLLER WITH HARMONIC INJECTION
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 15V, TA = 25°C, unless otherwise noted.
Supply Current vs.
Supply Voltage
100
Supply Current vs. TJ
10
10 Operating Current
1 1 Quiescent Current
0.1
0.01
0.001
0
5 10 15 20 25
VIN (V)
0.1
0.01
-50
Start-up Current
0 50 100
150
Start-up & UVLO vs. TJ
14
13 Rising
12
11
10
Falling
9
8
-50 0 50 100 150
VIN Zener Voltage vs. TJ
26
25
24
23
22
21
20
-50
0 50 100 150
Feedback Reference vs. TJ Delay-to-output vs. TJ
2.6 500
2.55
400
2.5 300
2.45
200
2.4 100
-50 0 50 100 150
-50 0 50 100 150
OVP Current vs. TJ
50
45
40
35
30
-50
0 50 100 150
Multiplier Characteristic
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
COMP=4V
COMP=4.5V
COMP=5V
COMP=3.5V
COMP=3V
COMP=2.6V
1 23
MULT (V)
4
Multiplier Gain vs. TJ
1
0.8
0.6
0.4
0.2
0
-50 0 50 100 150
MP44011 Rev. 1.01
www.MonolithicPower.com
1/12/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
5
5 Page 
MP44011 – BOUNDARY-MODE PFC CONTROLLER WITH HARMONIC INJECTION
Frequency of traditional
BCM flyback PFC
Frequency of
MP44011
0 t Tline/2
Figure 7: Switching Frequency
Even with the same transformer core as used for
a traditional BCM PFC, the efficiency improves
with harmonic injection.
With harmonic injection, the minimum frequency
occurs not at the top of the line but at the line’s
choppy regions. Compared with traditional BCM
PFC, the frequency at the top of the line
increases.
Power Factor Correction
The MP44011 senses the inductor current
through the current sense pin and compares it to
the choppy sinusoid signal which is generated
from the multiplier output. When the external
power MOSFET turns on, the primary inductor
current rises linearly. When it reaches the choppy
sinusoid signal, the external power MOSFET
turns off and the secondary diode turns on. Then
the secondary inductor current begins to fall.
When the secondary inductor current reaches
zero, the power MOSFET turns on again, which
causes the primary inductor current to start rise .
The power circuit works in boundary conduction
mode and inductor current’s signal envelope has
a choppy sinusoidal shape. The average current
also has a choppy sinusoidal shape. This control
method can achieve a high power factor.
Layout Guide
For boundary-mode PFC operation, the output
feeds back to the FB pin for comparison with the
reference voltage. Therefore, a constant
reference voltage is very important for an
accurate output. Use short traces to connect the
FB pin to the feedback resistors.
A rectified AC voltage and COMP voltage
generates the multiplier output, which generates
the inductor current envelope. Place a small
ceramic capacitor from the MULT pin to S-GND
and place compensation components close to
the COMP pin and S-GND to improve noise
immunity.
For zero-current sensing, place R5 close to the
ZCS pin to prevent noise caused by long wire.
For inductor current sensing, keep the trace from
the current-sensing resistor to the CS pin pin as
short as possible—even though there is an on-
chip filter on the CS pin—to prevent falsely
turning off MOSFET. If the design bars the use of
a short trace, add an external filter from the
sense resistor to the CS pin. To prevent noise
from P-GND, limit the connection between P-
GND and S-GND to one point.
To keep the chip operational with a stable VIN
voltage, keep the VIN capacitor as close to the
VIN pin to limit voltage fluctuations.
MP44011 Rev. 1.01
www.MonolithicPower.com
1/12/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet MP44011.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MP4401 | PULSE MOTOR DRIVE AND INDUCTIVE LOAD SWITCHING |  Toshiba Semiconductor |
| MP44010 | Boundary Mode PFC Controller | MPS |
| MP44011 | Boundary-Mode PFC Controller | MPS |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |