Datasheet
AC/DC Converter IC
PWM type DC/DC converter IC
Included a Switching MOSFET
BM2PXX5F/BM2PXX6F/BM2PXX7F/BM2PXX8F Series
●
General Description
The PWM type DC/DC converter (BM2PXXXF)
for AC/DC provides an optimal system for all products
that include an electrical outlet.
BM2PXXXF supports both isolated and non-
isolated devices, enabling simpler design of various
types of low-power electrical converters.
The built-in 650V HV starter circuit contributes
to low-power consumption.
A higher degree of design freedom can be
achieved with current detection resistors as external
devices. Current is restricted in each cycle and
excellent performance is demonstrated in bandwidth
and transient response since current mode control is
utilized. The switching frequency is 65 kHz. At light
load, the switching frequency is reduced and high
efficiency is achieved. A frequency hopping function
that contributes to low EMI is also included on chip.
Design can be easily implemented because
includes a 650V switching MOSFET.
●
Features
PWM frequency : 65kHz
PWM current mode control
Burst operation when load is light
Frequency reduction function
Built-in 650V starter circuit
Built-in 650V switching MOSFET
VCC pin Under-Voltage protection
VCC pin Over-Voltage 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
●
Basic specifications
Operating Power Supply Voltage Range:
VCC
DRAIN
8.9V to 26.0V
to 650V
Normal Operating Current:
(BM2Px5xF)
：0.60mA
(Typ.)
(BM2Px9xF)
：0.50mA
(Typ.)
■Burst
Operating Current:
Oscillation Frequency:
Operating Temperature:
MOSFET ON Resistance:
0.30mA(Typ.)
65kHz(Typ.)
- 40deg. to +105deg.
BM2Px5xF：4.0Ω (Typ.)
BM2Px9xF：8.5Ω (Typ.)
●
Package
SOP8
5.00mm x 6.20mm x 1.71mm pitch 1.27mm
(Typ.)
(Typ.)
(TYP.)
(TYP.)
●
Applications
For AC adapters and household appliances (vacuum
cleaners, humidifiers, air cleaners, air conditioners, IH
cooking heaters, rice cookers, etc.)
●Application
Circuit
Figure 1.
Application Circuit
○Product
structure：Silicon monolithic integrated circuit
.
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This
product has no designed protection against radioactive rays.
1/19
TSZ02201-0F2F0A200210-1-2
28.Oct.2016.Rev.002
BM2PXX5F/BM2PXX6F/BM2PXX7F/BM2PXX8F Series
●Absolute
Maximum Ratings
（Ta=25C）
Datasheet
Parameter
Maximum applied voltage 1
Maximum applied voltage 2
Maximum applied voltage 3
Drain current pulse
Drain current pulse
Symbol
V
max1
V
max2
V
max3
I
DP
I
DP
Rating
-0.3 to 32.0
-0.3 to 6.5
650
2.60
1.30
Unit
V
V
V
A
A
Conditions
VCC
SOURCE, FB, FADJ
DRAIN
P
W
=10us, Duty cycle=1%
(BM2Px5xF)
P
W
=10us, Duty cycle=1%
(BM2Px9xF)
When implemented
Power dissipation
P
d
0.56
W
Operating
o
-40 to +105
C
T
opr
temperature range
o
MAX junction temperature
T
jmax
150
C
Storage
o
T
str
-55 to +150
C
temperature range
(
Note1)
SOP8 : When mounted (on 70 mm × 70 mm, 1.6 mm thick, glass epoxy on single-layer substrate)
Derate by 4.563mW/°C when operating above T
a
=25°C.
Caution:
Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over the
absolute maximum ratings.
●Operating
Conditions
（Ta=25C）
Parameter
Power supply voltage range 1
Power supply voltage range 2
Symbol
V
CC
V
DRAIN
Rating
8.9 to 26.0
650
Unit
V
V
Conditions
VCC pin voltage
DRAIN pin voltage
●Electrical
Characteristics of MOSFET (unless otherwise noted, Ta = 25C, VCC = 15V)
Parameter
[MOSFET Block]
Between drain and
source voltage
Drain leak current
On resistance
On resistance
V
(BR)DDS
I
DSS
R
DS(ON)
R
DS(ON)
650
-
-
-
-
-
4.0
8.5
-
100
5.5
12.0
V
uA
Ω
Ω
I
D
=1mA / V
GS
=0V
V
DS
=650V / V
GS
=0V
I
D
=0.25A / V
GS
=10V
(BM2Px5xF)
I
D
=0.25A / V
GS
=10V
(BM2Px9xF)
Symbol
Specifications
Typ
Unit
Conditions
Min
Max
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
2/19
TSZ02201-0F2F0A200210-1-2
28.Oct.2016.Rev.002
BM2PXX5F/BM2PXX6F/BM2PXX7F/BM2PXX8F Series
●Electrical
Characteristics (unless otherwise noted, Ta = 25C, VCC = 15 V)
Specifications
Parameter
Symbol
Min
Typ
Max
[Circuit Current]
Circuit current (ON) 1
Circuit current (ON) 1
Circuit current (ON) 2
I
ON1
I
ON1
I
ON2
410
350
200
600
500
300
790
650
400
Datasheet
Unit
Conditions
FB=2.0(at pulse operation)
BM2Px5xF
FB=2.0(at pulse operation)
BM2Px9xF
FB=0.0V(at burst operation)
μA
μA
μA
[VCC Protection Function]
VCC UVLO voltage 1
VCC UVLO voltage 2
VCC UVLO hysteresis
VCC OVP voltage 1
VCC OVP voltage 2
VCC OVP hysteresis
Latch released VCC voltage
VCC recharge start voltage
VCC recharge stop voltage
Latch mask time
Thermal shut down temperature1
Thermal shut down temperature2
V
UVLO1
V
UVLO2
V
UVLO3
V
OVP1
V
OVP2
V
OVP3
V
LATCH
V
CHG1
V
CHG2
t
LATCH
T
SD1
T
SD2
F
SW1
F
SW2
F
DEL1
F
CH
I
BST
V
BST
F
BST
t
SS1
t
SS2
t
SS3
t
SS4
D
max
T
min
R
FB
Gain
V
BST1
V
BST2
V
BST3
V
DLT
V
FOLP1A
V
FOLP1B
T
FOLP1
T
FOLP2
V
SOURCE
V
S_SS1
V
S_SS2
V
S_SS3
V
S_SS4
t
LEB
K
SOURCE
V
SHT
T
SOURCESHT
I
START1
I
START2
I
START3
V
SC
12.50
7.50
-
26.0
-
-
-
7.70
12.00
50
120
-
60
20
-
75
0.80
1.13
-
0.30
0.60
1.20
3.20
68.0
150
23
-
0.220
0.260
-
1.100
2.60
-
80
332
0.375
-
-
-
-
-
12
0.020
1.80
0.100
1.000
-
0.800
13.50
8.20
5.30
27.5
23.5
4.0
V
UVLO2
-0.5
8.70
13.00
100
145
115
65
25
4.0
125
1.00
1.20
0.833
0.50
1.00
2.00
4.00
75.0
400
30
4.00
0.280
0.320
0.04
1.250
2.80
2.60
128
512
0.400
0.100
0.150
0.200
0.300
250
20
0.050
3.00
0.500
3.000
10
1.500
14.50
8.90
-
29.0
-
-
-
9.70
14.00
150
-
-
70
30
-
175
1.20
1.27
-
0.70
1.40
2.80
4.80
82.0
650
37
-
0.340
0.380
-
1.400
3.00
-
176
692
0.425
-
-
-
-
-
28
0.080
4.20
1.000
6.000
20
2.100
V
V
V
V
V
V
V
V
V
us
C
C
KHz
KHz
KHz
Hz
uA
V
KHz
ms
ms
ms
ms
%
ns
kΩ
V/V
V
V
V
V
V
V
ms
ms
V
V
V
V
V
ns
mV/us
V
us
mA
mA
uA
V
VCC= 0V
VCC=10V
Inflow current from Drain pin after
UVLO is released and when
MOSFET is OFF
Overload is detected (FB rise)
Overload is detected (FB fall)
BM2Pxx5F/BM2Pxx6F
Ton=0us
0[ms] to Tss1 [ms]
TSS1 [ms] to TSS2 [ms]
TSS2 [ms] to TSS3 [ms]
TSS3 [ms] to TSS4 [ms]
VCC rise
VCC fall
V
UVLO3
=
V
UVLO1
-
V
UVLO2
VCC rise
BM2Pxx6F/BM2Pxx8F
BM2Pxx6F/BM2Pxx8F
VCC fall
Control IC, temp rise
Control IC, temp fall
FB=2.00V
FB=0.30V
FB=2.0V
FADJ=0.0V
CFADJ=1000pF
[PWM Type DCDC Driver Block]
Oscillation frequency 1
Oscillation frequency 2
Frequency hopping width 1
Hopping fluctuation frequency
FADJ source current
FADJ comparator voltage
FADJ max burst frequency
Soft start time 1
Soft start time 2
Soft start time 3
Soft start time 4
Maximum duty
Minimum ON pulse
FB pin pull-up resistance
ΔFB
/
ΔSOURCE
gain
FB burst voltage 1
FB burst voltage 2
FB burst hysteresis
FB voltage of
starting frequency reduction mode
FB OLP voltage 1a
FB OLP voltage 1b
FB OLP ON time
FB OLP OFF time
FB fall
FB rise
V
BST3
=
V
BST2
-
V
BST1
[Over Current Detection Block]
Over-current detection voltage
Over-current detection voltage SS1
Over-current detection voltage SS2
Over-current detection voltage SS3
Over-current detection voltage SS4
Leading edge blanking time
Over current detection AC voltage
compensation factor
SOURCE pin short protection voltage
SOURCE pin short protection time
[Start Circuit Block]
Start current 1
Start current 2
OFF current
Start current switching voltage
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
3/19
TSZ02201-0F2F0A200210-1-2
28.Oct.2016.Rev.002
BM2PXX5F/BM2PXX6F/BM2PXX7F/BM2PXX8F Series
●Pin
Descriptions
Table 1. Pin Description
NO.
1
2
3
4
5
6
7
8
Pin Name
VCC
N.C.
N.C.
DRAIN
SOURCE
FADJ
GND
FB
I/O
I
-
-
I/O
I/O
I
I/O
I
Function
ESD Diode
VCC
GND
-
✔
-
-
-
-
-
-
✔
✔
✔
✔
✔
-
✔
✔
Datasheet
Power supply input pin
-
-
MOSFET DRAIN
pin
MOSFET SOURCE
pin
MAX Burst Frequency setting pin
GND pin
Feedback signal input pin
●I/O
Equivalent Circuit Diagram
Figure 2. I/O Equivalent Circuit Diagram
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
4/19
TSZ02201-0F2F0A200210-1-2
28.Oct.2016.Rev.002
BM2PXX5F/BM2PXX6F/BM2PXX7F/BM2PXX8F Series
●Block
Diagram
FUSE
AC
Filter
Diode
Bridge
Datasheet
VCC
1
VCC UVLO
13 . 5V
/ 8 .2V
+
-
+
-
100us
Filter
DRAIN
4
VCC OVP
4.0V
Line Reg
12V Clamp
Circuit
Internal Block
Starter
10uA
27 . 5V
FADJ
6
Burst
Frequency
Control
4 .0 V
30k
S
R
Q
DRIVER
PWM Control
+
Burst Control
4.0V
FB
8
OLP
-
+
128 ms/
512ms
Timer
Burst
Comparator
-
+
1M
Current
Limiter
+
-
Leading Edge
Blanking
(typ =250 ns)
5
SOURCE
Rs
Soft Start
AC Input
Compensation
PWM
Comparator
-
+
MAX
DUTY
Frequency
Hopping
7
GND
+
OSC
(65kHz )
Slope
Compensation
FeedBack
With
Isolation
Figure 3. Block Diagram
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/19
TSZ02201-0F2F0A200210-1-2
28.Oct.2016.Rev.002
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