ROHM BP5234A33

BP5232A25/BP5232A33
BP5233A33/BP5234A33
Dimensions (Unit : mm)
The BP5232A25, BP5232A33, BP5233A33, BP5234A33 are
DC/DC converters that use PWM system and VFM system.
They contain control circuits, switching devices and coils, and
operate by only connecting an I/O smoothing capacitor.
With a high efficiency of power conversion, the modules are
available in stand-alone SIP packages with no heat sink
required.
T
T
Marked side
Marked side
DC/DC converter
H
4±1.0
Applications
Power supplies for copiers, personal computers, facsimiles,
industrial equipment, and AV equipment.
P=2.54±0.2
0.5±0.1
1.3±0.2
Features
1) High power conversion efficiency. (BP5233A33 : 93%)
2) Large output current.
3) Low current consumption with no load.
(BP5233A33 : 200µA Typ.)
4) High conversion efficiency. (85% at output current of 100mA)
5) Applicable to various purposes by fine-adjusting output
voltage with external circuits.
6) Built-in ON / OFF switch.
7) Heat sink unnecessary.
0.25±0.05
L
H
T
BP5232A25
28.0
19.5
12.0
BP5232A33
28.0
19.5
12.0
BP5233A33
32.5
23.5
11.0
BP5234A33
38.5
23.5
12.5
Absolute maximum ratings (Ta=25°C)
Parameter
Input voltage
Output current
Operating temperature
Storage temperature
Symbol
Limits
BP5232A25 BP5232A33 BP5233A33 BP5234A33
V
7
VIN
2∗
IO
Unit
2∗
3∗
4∗
A
Topr
−20 to +55
°C
Tstg
−25 to +80
°C
∗ Derating required according to the input voltage and ambient temperature.
Recommended operating conditions (Ta=25°C)
Parameter
Input voltage
Symbol
Min.
Typ.
Max.
Unit
VIN
4.5
5.0
5.5
V
Rev.C
1/7
Block diagram
BP5232A25 / BP5232A33
BP5233A33 / BP5234A33
3
10
VIN=5V
+
1000µF
1000µF
+
VO
+
470µF
2
9
9
2
10
3
VO
+
470µF
VIN=5V
11
1
Control circuit
1
Control circuit
7
7
CTL signal
ON / OFF
CTL signal
ON / OFF
6
5
4
6
5
4
Pin descriptions
BP5233A33 , BP5234A33
BP5232A25 , 5232A33
Pin No.
Pin description
Pin No.
Pin No.
Pin description
Pin description
Pin No.
Pin description
1
Feed back
6
GND
1
Feed back
6
GND
2
VOUT1
7
CTL
2
VOUT1
7
CTL
3
VOUT2
9
VIN1
3
VOUT2
9
VIN1
4
GND
10
VIN2
4
GND
10
VIN2
5
GND
5
GND
11
VIN3
Pin 8 is removed.
Pin 8 is removed.
Electrical characteristics
BP5232A25 (Unless otherwise noted, VlN=5V, IO=1A, SW=1, Ta=25°C)
Parameter
Symbol
Min.
Input voltage
VIN
4.5
5
5.5
V
Output voltage
VO
2.4
2.5
2.6
V
Output current
IO
−
−
2
A
Current consumption at no load
IIN
−
200
300
∆VO
−
13
υγ
−
33
Load regulation
Output ripple voltage
Typ.
Max.
Unit
Conditions
DC
Measurement circuit
Fig.1
Fig.1
∗1
Fig.1
µA
IO=0A
Fig.1
33
mV
IO=0.1A to 2A
Fig.1
100
mVPP
∗2
Fig.1
η
84
89
−
%
CTL pin ON voltage
VON
1.8
−
−
V
SW=2
Fig.1
CTL pin OFF voltage
VOFF
−
−
0.3
V
SW=2
Fig.1
Power conversion efficiency
Fig.1
∗1 Derating required according to the input voltage and ambient temperature.
∗2 Pulse noise not included.
Rev.C
2/7
BP5232A33 (Unless otherwise noted,
Parameter
VIN=5V, IO=1A, SW=1, Ta=25°C)
Symbol
Min.
Typ.
Max.
Unit
Input voltage
VIN
4.5
5
5.5
V
Output voltage
VO
3.17
3.3
3.43
V
Output current
IO
−
−
2
A
Current consumption at no load
Load regulation
Output ripple voltage
Conditions
DC
Measurement circuit
Fig.1
Fig.1
∗1
Fig.1
IIN
−
200
300
µA
IO=0A
Fig.1
∆VO
−
16
42
mV
IO=0.1A to 2A
Fig.1
υγ
−
33
100
mVPP
Fig.1
η
88
93
−
%
CTL pin ON voltage
VON
1.8
−
−
V
SW=2
Fig.1
CTL pin OFF voltage
VOFF
−
−
0.3
V
SW=2
Fig.1
Power conversion efficiency
Fig.1
∗1 Maximum output current must be reduced by ambient temperature.
BP5233A33 (Unless otherwise noted, VIN=5V, IO=1.5A, SW=1, Ta=25°C)
Symbol
Min.
Typ.
Max.
Unit
Input voltage
Parameter
VIN
4.5
5
5.5
V
Output voltage
VO
3.17
3.3
3.43
V
Output current
IO
−
−
3
A
IIN
−
200
300
∆VO
−
16
42
Current consumption at no load
Load regulation
Conditions
DC
∗2
Measurement circuit
Fig.2
Fig.2
∗1, 4
Fig.2
µA
IO=0A
Fig.2
mV
IO=0.1A to 3A
Fig.2
∗3
Fig.2
Output ripple voltage
υγ
−
33
150
mVPP
Power conversion efficiency
η
88
93
−
%
CTL pin ON voltage
VON
1.8
−
−
V
SW=2
Fig.2
CTL pin OFF voltage
VOFF
−
−
0.3
V
SW=2
Fig.2
Fig.2
∗1 Maximum output current must be reduced by ambient temperature.
∗2 Give the start time of input as 5ms within.
∗3 An output ripple voltage sometimes changes in capacitor to use, the measurement environment.
∗4 There is restriction in use time, in the case that the output current is 2.5A over.
Please refer to " the passage output current characteristic" of later description.
BP5234A33 (Unless otherwise noted, VIN=5V, IO=2A, SW=1, Ta=25°C)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Measurement circuit
Input voltage
VIN
4.5
5
5.5
V
Output voltage
VO
3.17
3.3
3.43
V
Output current
IO
−
−
4
A
Current consumption at no load
IIN
−
300
400
∆VO
−
16
42
Output ripple voltage
υγ
−
33
150
mVPP
Power conversion efficiency
η
88
93
−
%
CTL pin ON voltage
VON
1.8
−
−
V
SW=2
Fig.2
CTL pin OFF voltage
VOFF
−
−
0.3
V
SW=2
Fig.2
Load regulation
DC
Fig.2
Fig.2
∗1, 3
Fig.2
µA
IO=0A
Fig.2
mV
IO=0.1A to 4A
Fig.2
∗2
Fig.2
Fig.2
∗1 Maximum output current must be reduced by ambient temperature.
∗2 Give the start time of input as 5ms within.
∗3 An output ripple voltage sometimes changes in capacitor to use, the measurement environment.
Rev.C
3/7
Measurement circuit
BP5232A25 / BP5232A33
10
7
6
5
4
3
2
1
VO
1
+
0.47µF
V
f
C3
C2
+
C1
V
A
SW
1000µF / 50V
2
470µF / 50V
A
9
VIN
∗A
large ripple current flows to the input smoothing capacitor due
to the output load. Be minded to use within the allowable ripple
current of the capacitor.
∗The capacitor with a particularly low impedance is used as the
output smoothing capacitor C2 so as to suppress the output ripple
voltage. Select the capacitor according to the purpose of use in
each case.
f
: frequency counter
C1, C2 : Low impedance type
C3
: film capacitor
Fig.1
T
Switching frequency=1 / T
Output ripple voltage
Note that the output ripple voltage depends on the type and characteristics of the output capacitor.
BP5233A33 / BP5234A33
11
10
9
7
VIN
6
5
4
3
2
1
VO
1
f
: frequency counter
C1, C2 : Low impedance type
C3
: film capacitor
0.47µF
+
+
V
f
C3
C1
V
A
SW
1000µF / 50V
2
470µF / 50V
C2
A
∗A
large ripple current flows to the input smoothing capacitor due
to the output load. Be minded to use within the allowable ripple
current of the capacitor.
∗The capacitor with a particularly low impedance is used as the
output smoothing capacitor C2 so as to suppress the output ripple
voltage. Select the capacitor according to the purpose of use in
each case.
Fig.2
T
Switching frequency=1 / T
Output ripple voltage
Note that the output ripple voltage depends on the type and characteristics of the output capacitor.
Rev.C
4/7
Circuit operation
(1) The basic application examples are shown in Fig.3. The externally installed parts are only the input and output
smoothing capacitors.
(2) Switching on and off the output voltage is allowed. The output can be switched off by making pin 7 to be low or
open (high impedance). (See Fig.4)
(3) Fine adjustment of the output voltage is allowed. The fine adjustment of output voltage can be performed from
pin 1 via the resistor by connecting the output terminal (pin2, 3) and GND. (See Fig.5)
(4) Be sure to use a fuse for the safety.
Basic application
BP5232A25 / BP5232A33
10
VIN
9
7
6
5
4
3
BP5233A33 / BP5234A33
2
1
VO
VIN
FUSE
11
10
9
7
6
5
4
3
2
1
VO
FUSE
+
470µF
+
1000µF
+
470µF
+
1000µF
Fig.3
Output ON / OFF control
BP5232A25 / BP5232A33
10
VIN
9
7
6
5
4
3
BP5233A33 / BP5234A33
2
1
VO
SW
FUSE
11
VIN
10
9
7
5
4
3
2
1
VO
SW
FUSE
+
470µF
+
1000µF
6
+
470µF
+
1000µF
Fig.4
Output voltage fine adjustment
BP5232A25 / BP5232A33
10
VIN
9
7
6
5
4
3
BP5233A33 / BP5234A33
2
1
SW
FUSE
VO'
+
470µF
10
9
+
1000µF
VO
R2
7
SW
FUSE
R1
−
1000µF
VIN
11
6
5
4
3
2
1
VO'
R1
VO
R2
VO' value setting equations
VO'=VO
1+
R1
R2
R1+R2 ≤ 50kΩ
It is recommended that the output voltage should be adjusted
within the range of ±10% of the rated output voltage, so that
the performance of the module can fully be exhibited.
Fig.5
Rev.C
5/7
Operation notes
(1) The output current should be reduced according to an increase in the input voltage or ambient
temperature. Use the module within the derating curve range.
(2) In case that the output is controlled by switching on and off utilizing pin 7 or in case that the input voltage
is applied, a large inrush electrical current may flow. Be minded to use within the allowable operating range.
This allowable operating range is specified by the safety operating range of the switching transistor in the
module. The amount of the inrush current varies depending on the output impedance of the input power
supply or the capacity value of the capacitor to be connected to the output.
(3) Protection circuit for output current is incorporated. In case that the output is short-circuited, the output will be
latched by switching off. The protection circuit can be canceled by making CTL terminal active state (CTL=
HIGH), after once making it standby state (CTL=LOW), or by resupplying the power. However, in case that the
protection circuit is canceled by resupplying the power source, it may not be canceled even by resupplying
the power source in the state that the electrical charge is remained in CIN (the state that voltage is remained
in VIN) even after the power source is switched off.
(4) The rising time of the input voltage should be made within 5ms. There may be a case that the protection
circuit is activated.
(5) I / O smoothing capacitors should be connected between I / O and GND terminals.
(6) Normally, use by short-circuiting pins 1, 2, 3, pins 4, 5, 6, and pins 9, 10, 11 (BP5232A25) respectively.
(7) A large ripple current flows to the input smoothing capacitor due to the output load. Be minded to use
within the allowable ripple current of the capacitor.
(8) The capacitor with a particularly low impedance is used as the output smoothing capacitor C2 so as to
suppress the output ripple voltage. Select the capacitor according to the purpose of use in each case.
Electrical characteristics
BP5232A25
5
100
100
VIN=4.0V
4
80
PW=100µs
VIN=5.0V
VIN=6.0V
INPUT CURRENT (A)
CONVERSION EFFICIENCY : η (%)
OUTPUT CURRENT : IO (A)
90
70
3
60
50
2
40
30
1
PW=10ms
10
20
10
0
50
100
0
AMBIENT TEMPERATURE : Ta (°C)
TC=25˚C
Single Pulse
0.5
1.0
1.5
1
0.1
2.0
Fig.6 Derating curve
1
10
VOLTAGE BETWEEN INPUT PIN
TO OUTPUT PIN (V)
OUTPUT CURRENT : IO (A)
Fig.7 Conversion efficiency
Fig.8 Safe operation range
BP5232A33
5
100
100
4
80
VIN=5.0V
VIN=6.0V
70
3
PW=100µs
VIN=4.0V
INPUT CURRENT (A)
CONVERSION EFFICIENCY : η (%)
OUTPUT CURRENT : IO (A)
90
60
50
2
40
30
1
20
10
0
PW=10ms
10
50
AMBIENT TEMPERATURE : Ta (°C)
Fig.9 Derating curve
100
0
TC=25˚C
Single Pulse
0.5
1.0
1.5
OUTPUT CURRENT : IO (A)
Fig.10 Conversion efficiency
2.0
1
0.1
1
10
VOLTAGE BETWEEN INPUT PIN
TO OUTPUT PIN (V)
Fig.11 Safe operation range
Rev.C
6/7
BP5233A33
3.5
100
80
DC
2.5
70
VIN=5.0V
PW=100µs
VIN=6.0V
VIN=4.0V
INPUT CURRENT (A)
OUTPUT CURRENT : IO (A)
3
100
90
CONVERSION EFFICIENCY : η (%)
1ms
60
2
50
1.5
40
30
1
PW=10ms
10
20
0.5
0
10
0
5 10 15 20 25 30 35 40 45 50 55 60
TC=25˚C
Single Pulse
0.5
AMBIENT TEMPERATURE : Ta (˚C)
1.0
1.5
2.0
2.5
1
0.1
3.0
Fig.12 Derating curve
1
10
VOLTAGE BETWEEN INPUT PIN
TO OUTPUT PIN (V)
OUTPUT CURRENT : IO (A)
Fig.13 Conversion efficiency
Fig.14 Safe operation range
BP5234A33
4.5
100
3
DC
VIN=4.0V
PW=100µs
VIN=5.0V
INPUT CURRENT (A)
OUTPUT CURRENT : IO (A)
80
3.5
100
90
CONVERSION EFFICIENCY : η (%)
1ms
4
70
VIN=6.0V
60
2.5
50
2
40
1.5
30
1
20
0.5
0
PW=10ms
10
10
5 10 15 20 25 30 35 40 45 50 55 60
AMBIENT TEMPERATURE : Ta (˚C)
Fig.15 Derating cureve
0
TC=25˚C
Single Pulse
0.5
1.0 1.5
2.0
2.5
3.0
3.5 4.0
OUTPUT CURRENT : IO (A)
Fig.16 Conversion efficiency
1
0.1
1
10
VOLTAGE BETWEEN INPUT PIN
TO OUTPUT PIN (V)
Fig.17 Safe operation range
Rev.C
7/7
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level of
reliability and the malfunction of with would directly endanger human life (such as medical instruments,
transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other
safety devices), please be sure to consult with our sales representative in advance.
About Export Control Order in Japan
Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control
Order in Japan.
In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause)
on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.1