|
|
PDF MP6910 Data sheet ( Hoja de datos )
| Número de pieza | MP6910 | |
| Descripción | Fast Turn-off Intelligent Rectifier | |
| Fabricantes | MPS | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MP6910 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
|
No Preview Available !
MP6910
The Future of Analog IC Technology
Fast Turn-off Intelligent Rectifier
DESCRIPTION
The MP6910 is a fast turn-off intellig ent rectifier
for Flyback converters that combines a 100V
power switch that repla ces diode r ectifiers for
high efficien cy. The chip regulates the forward
voltage drop of the internal power switch to
about 70mV and turns it off before the voltage
goes negative.
FEATURES
• Supports DCM and Quasi-Resonant
Flyback converter
• Integrated 10mΩ 100V Power Switch
• Compatible with Energy Star, 1W Standby
Requirements
• VDD Range From 8V to 24V
• Max 400kHz Switching Frequency
• Supports High-side and Low-side
Rectification
• Power Savings of Up to 1.5W in a Typical
Notebook Adapter
APPLICATIONS
• Industrial Power Systems
• Distributed Power Systems
• Battery Powered Systems
• Flyback Converters
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks
of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP6910
MP6910 Rev. 1.04
www.MonolithicPower.com
1/3/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
1
http://www.Datasheet4U.com
1 page  
MP6910- FAST TURN-OFF INTELLIGENT RECTIFIER
fairly small, this funct ion can make the
internal driver voltage f airly low when the
mosfet is turned off to fast the turn off speed
(this funct ion is st ill a ctive during turn on
blanking pe riod which means the integrate
mosfet could still be turned off even with
very small duty).
Fig.3 sho ws synchronous rectification
operation at heavy load condition. Due to
the high cu rrent, the in ternal driver voltage
will be satu rated at first. After Vds goes to
above -70 mV, driver voltage decreases to
adjust the Vds to typical -70mV.
Fig.4 sho ws synchronous rectification
operation at light load condition. Due to the
low current, the driver
voltage never
saturates but begins to decrease as soon as
the integrated mosfet is turned on and adjust
the Vds.
z Turn Off Phase
When Vds rises to trigger the turn off
threshold (- 30mV), the driver volta ge of the
switch is pu lled to low after about 20ns turn
off delay (d efined in Fig.2) by the control
circuitry. Similar with turn-on phase , a 200ns
blanking time is adde d after the switch is
turned off to avoid error trigger.
Light-load Latch-off Function
The gate driver of integr ate Mosfet in MP6910 is
latched to save the d river loss at light-loa d
condition to improve efficiency. T he light-loa d-
enter pulse width T LL is internal f ixed (~2.2 μs).
When synchronous power switch conductin g
period keep s lower than T LL for lo nger than the
light-load-enter delay (T LL-Delay), MP6910 enters
light-load m ode and la tches off t he integrat e
Mosfet (Fig.5 for detail).
During light -load mode, MP6910 monitors th e
integrate Mosfet body diode conducting period by
sensing V DS (when V DS exceeds the light-loa d
mode exit pulse width t hreshold V LL-DS, MP6910
considers t he integrat e Mosfet body diode
conducting time finishe s). If the Mosfet bod y
diode cond uction time is lo nger t han T LL+TLL-H
(TLL-H, light-load-enter pulse width hysteresis), the
light-load mode is finished and the integrate
Mosfet of MP6910 is unlatched to restart t he
synchronous rectification (Fig.6 for detail).
Typical System Implementations
Fig.7 shows the typical system i mplementation
for the IC supply derived from o utput voltage,
which is available in low-side rectification and the
output voltage is recommended to be in t he VDD
range of MP6910 (from 8V to 24V).
If output v oltage is o ut of the VDD range of
MP6910 or high-side r ectification is used, it is
recommended to use a n auxiliary winding fro m
the power transformer for the IC supply, which is
shown in Fig.8 and Fig.9.
There is another non-auxiliary win ding solutio n
for the IC supply, which uses an external LDO
circuit from the secondary transformer windin g.
See fig.10 and fig.1 1, compared with using
auxiliary winding for IC supply, this solution has a
bit higher p ower loss which is d issipate on t he
LDO circuit especially when the secondary
winding voltage is high.
VDS
-30mV
-70mV
tDon tDoff
InternalDriverVoltage
2V
Figure 2—Turn on and Turn off delay
MP6910 Rev. 1.04
www.MonolithicPower.com
1/3/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MP6910.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MP691 | (MP690 - MP695) Microprocessor Supervisory Circuits |  Supertex |
| MP6910 | Fast Turn-off Intelligent Rectifier | MPS |
| MP6912 | Subminiature High Speed Data Acquisition System Module |  Analogic |
| 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 |