|
|
PDF MP155 Data sheet ( Hoja de datos )
| Número de pieza | MP155 | |
| Descripción | Energy Efficient Off-line Regulator | |
| Fabricantes | MPS | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MP155 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
MP155
Energy Efficient Off-line Regulator
The Future of Analog IC Technology
DESCRIPTION
The MP155 is a prim ary-side regulator that
provides accurate con stant voltage regulation
without the opto-coupler, and supports Buck,
Buck-boost, Boost and Flyback top ologies. An
integrated 500V MOSFET simplifies th
e
structure a nd reduces cost s. Th ese feature s
make it a competitive candidate for off-line low-
power applications, su ch as home appliances
and standby power.
The MP1 55 is a green-mode-operatio n
regulator. Both the peak curre nt and th e
switching f requency decrease as the load
decreases. As a re sult, it off ers excellent
efficiency performance at ligh t load, thu s
improving the overall average efficiency.
The MP155 features various prote ctions su ch
as thermal shutdown (TSD), VCC under-voltage
lockout (UVLO), overload protection (OLP),
short-circuit protection (SCP), and open loop
protection.
The MP155 is available in the TSOT23-5 and
SOIC8 packages.
FEATURES
• Primary-side constant voltage (CV) control,
supporting Buck, Buck-boost, Boost and
Flyback topologies
• Integrated 500V/20Ω MOSFET
• < 100mW No-load power consumption
• Up to 3W output power
• Maximum DCM output current of 130mA
• Maximum CCM output current of 220mA
• Low VCC operating current
• Frequency foldback
• Maximum frequency limit
• Peak current compression
• Internal high-voltage current source
• Internal 350ns leading-edge blanking
• Thermal shutdown (auto restart)
• VCC under-voltage lockout with hysteresis
(UVLO)
• Timer-based overload protection.
• Short circuit protection
• Open loop protection
APPLICATIONS
• Home Appliances, white goods and
consumer electronics
• Industrial Controls
• Standby Power
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit M PS website u nder Q uality Assurance. “MPS” and “ The
Future of An alog IC Technology” a re Re gistered T rademarks of Mo nolithic
Power Systems, Inc.
TYPICAL APPLICATION
D3 L1
C1 C2
DRAIN
VCC
FB
SOURCE SOURCE
MP155
D2
C3 R1
R2
C4
L2
Output
D1 C5
MP155 Rev. 1.12
10/28/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
http://www.Datasheet4U.com
1 page  
MP155 – ENERGY EFFICIENT OFF-LINE REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 265VAC, VOUT = 12V, IOUT = 200mA, L = 2.2mH, COUT = 100μF, TA = +25°C, unless otherwise
noted.
Start up
Normal operation
SCP
VDS
100V/div.
IL
100mA/div.
Zoom In
VDS
100V/div.
IL
100mA/div.
Open Loop Protection
Zoom In
VDS
100V/div.
IL
100mA/div.
Zoom In
VDS
100V/div.
IL
250mA/div.
Zoom In
MP155 Rev. 1.12
10/28/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
5
5 Page 
MP155 – ENERGY EFFICIENT OFF-LINE REGULATOR
Over Load Protection (OLP)
As the load increa ses, the peak cu rrent and th e
switching frequency increase with the load. When
the switching frequency and peak curren
t
reaches the ir maximu ms, the outpu t voltage will
decrease if the load co ntinues to in crease. Then
the FB voltage will drop below OLP threshold.
By continuously monitoring the FB voltage, the
timer starts when the FB voltage drops below t he
1.7V error flag threshold. Removing the error flag
resets the timer. If the timer continues to
completion at 170ms (fs =37 kHz), OLP occurs.
This t imer duration avoids tr iggering OLP when
the power supply start s up or e nters a load
transition p hase, and t herefore re quires that t he
power supp ly start up in less th an 170ms. A
different switching freq uency (f s) changes th e
over-load protection delay time, as shown below:
τDealy
≈ 170ms ×
37kHz
fs
Short Circuit Protection (SCP)
The MP155 shuts dow n when the peak curre nt
rises above 450mA as its short-circuit protectio n
threshold. T he power supply resumes operation
after removing the fault.
Thermal shutdown (TSD)
To prevent from any let hal thermal damage, the
MP150 shu ts down switching when the inner
temperature exceeds 150 °C. Dur ing thermal
shutdown ( TSD), the VCC drops to 2.4V, a nd
then the internal high voltage regulator recharges
VCC.
Open Loop Detection
If the V FB drops below 60mV, the IC will sto p
working and begins a re-start cycle. The open-
loop detection is blanked for 128 switching cycles
during start-up.
Leading-Edge Blanking
An internal leading-ed ge blankin g (LEB) unit
between the current sen se resist or inside the IC
and the current co
mparator i nput avoids
prematurely switching pulse termination due to
the parasit ic capa citance. During the blankin g
period, the current comparator is d isabled and
cannot turn off the external MOSFET. Figure 6
shows leading-edge blanking.
Figure 6: Leading-Edge Blanking
MP155 Rev. 1.12
10/28/2013
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet MP155.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MP15-005 | Diode ( Rectifier ) |  American Microsemiconductor |
| MP15-005W | Diode ( Rectifier ) | American Microsemiconductor |
| MP15-01 | Diode ( Rectifier ) | American Microsemiconductor |
| MP15-01W | Diode ( Rectifier ) | American Microsemiconductor |
| 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 |