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Número de pieza | BM2P051F | |
Descripción | PWM type DC/DC converter IC Included 650V MOSFET | |
Fabricantes | ROHM Semiconductor | |
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No Preview Available ! Datasheet
AC/DC Drivers
PWM type DC/DC converter IC
Included 650V MOSFET
BM2PXX1F Series
●General
The PWM type DC/DC converter (BM2PXX1F) for
AC/DC provide an optimum system for all products
that include an electrical outlet.
BM2PXX1F supports both isolated and non-isolated
devices, enabling simpler design of various types of
low-power electrical converters.
BM2PXX1F built in a HV starter circuit that tolerates
650V, it contributes to low-power consumption.
With current detection resistors as external devices, a
higher degree of design freedom is achieved. Since
current mode control is utilized, current is restricted in
each cycle and excellent performance is demonstrated
in bandwidth and transient response.
The switching frequency is 65 kHz. At light load, the
switching frequency is reduced and high efficiency is
achieved.
A frequency hopping function is also on chip, which
contributes to low EMI.
We can design easily, because BM2PXX1F includes
the switching MOSFET.
●Features
PWM frequency : 65kHz
PWM current mode method
Burst operation when load is light
Frequency reduction function
Built-in 650V start circuit
Built-in 650V switching MOSFET
VCC pin under voltage protection
VCC pin overvoltage protection
SOURCE pin Open protection
SOURCE pin Short protection
SOURCE pin Leading-Edge-Blanking function
Per-cycle over current protection circuit
Soft start
Secondary Over current protection circuit
BR pin AC input low voltage protection
BR pin AC input high voltage protection
●Package
SOP8
W (Typ.) x D (Typ.) x H (Max.)
5.00mm x 6.20mm x 1.71mm
●Basic specifications
Operating Power Supply Voltage Range:
VCC 8.9V to 26.0V DRAIN:~650V
Operating Current: Normal Mode
BM2P051F: 0.60mA (Typ.)
BM2P091F: 0.50mA (Typ.)
Burst Mode: 0.40mA (Typ.)
Oscillation Frequency:
Operating Temperature:
65 kHz (Typ.)
- 40 oC to +105 oC
MOSFET ON Resistance:
BM2P051F: 4.0Ω (Typ.)
BM2P091F: 8.5Ω (Typ.)
●Application circuit
●Applications
AC adapters and household appliances (vacuum
cleaners, humidifiers, air cleaners, air conditioners, IH
cooking heaters, rice cookers, etc.)
●Line up
Product MOSFET ON resistor
BM2P051F
4.0Ω
BM2P091F
8.5Ω
Figure 1.Application circuit
○Product structure:Silicon monolithic integrated circuit
.www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays
1/20
TSZ02201-0F2F0A200020-1-2
24.Sep.2015.Rev.006
1 page BM2PXX1F
●Block Diagram
BR
Datasheet
Figure 3. Block Diagram
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/20
TSZ02201-0F2F0A200020-1-2
24.Sep.2015.Rev.006
5 Page BM2PXX1F
Datasheet
(5) Over Current limiter
BM2PXX1F is built in Over Current limiter per cycle. If the SOURCE pin exceeds a certain voltage, switching is stopped.
It is also built in AC voltage compensation function. This is the function which compensates the maximum power as the AC
voltage’s change by increasing over current limiter with time.
Shown in figure-12, 13, and 14.
Figure 12. No AC voltage compensation function
Figure13. Built-in AC compensation voltage
Primary peak current is decided as the formula below.
Primary peak current: Ipeak = Vs./Rs + Vdc/Lp*Tdelay
Vcs:Over current limiter voltage internal IC, Rs:Current detection resistance, Vdc input DC voltage, Lp:Primary inductance,
Tdelay:delay time after detection of over current limiter
Figure 14. Over current limiter voltage
(6) L.E.B period
When the driver MOSFET is turned ON, surge current occurs at each capacitor component and drive current.
Therefore, because SOURCE pin voltage rises temporarily, the detection errors may occur in the over current limiter circuit.
To prevent detection errors, DRAIN is switched from high to low and the SOURCE signal is masked for 250 ns by the
on-chip LEB (Leading Edge Blanking) function.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/20
TSZ02201-0F2F0A200020-1-2
24.Sep.2015.Rev.006
11 Page |
Páginas | Total 24 Páginas | |
PDF Descargar | [ Datasheet BM2P051F.PDF ] |
Número de pieza | Descripción | Fabricantes |
BM2P051 | PWM type DC/DC converter IC Included 650V MOSFET | ROHM Semiconductor |
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