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PDF BM2P031 Data sheet ( Hoja de datos )

Número de pieza BM2P031
Descripción PWM type DC/DC converter IC Included 650V MOSFET
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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No Preview Available ! BM2P031 Hoja de datos, Descripción, Manual

Datasheet
AC/DC Drivers
PWM type DC/DC converter IC
Included 650V MOSFET
BM2PXX1 Series
General Description
The PWM type DC/DC converter (BM2PXX1) for
AC/DC provide an optimum system for all products
that include an electrical outlet.
BM2PXX1 supports both isolated and non-isolated
devices, enabling simpler design of various types of
low-power electrical converters.
BM2PXX1 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 BM2PXX1 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
DIP7
9.20mm×6.35mm×4.30mm pitch 2.54mm
(Typ.) (Typ.) (Typ.)
(Typ.)
Basic specifications
Operating Power Supply Voltage Range:
VCC 8.9V to 26.0V DRAIN:~650V
Operating Current: Normal Mode
BM2P011: 0.950mA (Typ.)
BM2P031: 0.775mA (Typ)
BM2P051: 0.600mA (Typ)
BM2P091: 0.500mA (Typ)
Burst Mode0.400mA (Typ.)
Oscillation Frequency:
Operating Temperature:
65kHz (Typ.)
- 40 oC to +105 oC
MOSFET ON Resistance:
BM2P011:1.4(Typ)
BM2P031:2.4(Typ)
BM2P051:4.0(Typ)
BM2P091:8.5(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
BM2P011
BM2P031
BM2P051
BM2P091
MOSFET ON Resistor
1.4
2.4
4.0
8.5
Figure 1. Application circuit
Product structureSilicon monolithic integrated circuit
.www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed protection against radioactive rays
1/19
TSZ02201-0F2F0A200010-1-2
24.Sep.2015.Rev.005

1 page




BM2P031 pdf
BM2PXX1 Series
Block Diagram
+ FUSE
AC
-
Filter
Diode
Bridge
Datasheet
BR
2
4
5
VCC OVP
13.5V/ 8.2V
+
-
VCC UVLO
+
-
100us
Filter
27. 5V
+
-
0 .50V/ 0. 35V
+
-
2. 0V /2 .1 V
256ms
Timer
100us
Filter
4.0V
Line Reg
Internal Block
12 V Clamp
Circuit
S
RQ
DRIVER
4.0V
.
30k OLP
-
+
PWM Control
64ms
Timer
Burst
Comparator
-
+
Current
Limiter
+
-
Leading Edge
Blanking
( typ =250ns)
PWM
Comparator
-
+
MAX
DUTY
OSC
+ (65kHz)
Soft Start
AC Input
Compensation
Frequency
Hopping
Slope
Compensation
6
Starter
10uA
1M
7
1
3
FeedBack
With
Isolation
Figure 3. Block Diagram
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
5/19
TSZ02201-0F2F0A200010-1-2
24.Sep.2015.Rev.005

5 Page





BM2P031 arduino
BM2PXX1 Series
Datasheet
(5) Over Current limiter
BM2PXX1 is built in Over Current limiter per cycle. If the SOURCE pin over 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 = Vcs/Rs + Vdc/Lp*Tdelay
VcsOver current limiter voltage internal IC, RsCurrent detection resistance, Vdc input DC voltage, LpPrimary inductance,
Tdelaydelay 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 when 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.
TSZ2211115001
11/19
TSZ02201-0F2F0A200010-1-2
24.Sep.2015.Rev.005

11 Page







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