BP5232-25A / BP5232-33A / BP5233-33A / BP5234-33A
Power Module
DC / DC converter
BP5232-25A / BP5232-33A / BP5233-33A /
BP5234-33A
The BP5232-25A, BP5232-33A, BP5233-33A and BP5234-33A are DC / DC converters that use PWM system and VIF
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.
!
Applications
Power supplies for copiers, personal computers, facsimiles, industrial equipment, and AV eqipment
!Features
1) High power conversion efficiency. (BP5233-33A : 93%)
2) Large output current.
3) Low current consumption with no load. (BP5233-33A : 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.
!
Absolute maximum ratings
(Ta=25°C)
Parameter
Input voltage
Output current
Operating temperature
Storage temperature
Symbol
V
IN
I
O
Topr
Tstg
2
∗
2
∗
−20
~
+55
−25
~
+80
Limits
BP5232-25A BP5232-33A BP5233-33A BP5234-33A
7
3
∗
4
∗
Unit
V
A
°C
°C
∗
Derating required according to the input voltage and ambient temperature..
!Recommended
operating conditions
(Ta=25°C)
Parameter
Input voltage
Symbol
V
IN
Min.
4.5
Typ.
5.0
Max.
5.5
Unit
V
BP5232-25A / BP5232-33A / BP5233-33A / BP5234-33A
Power Module
!
Block diagram
BP5232-25A / BP5232-33A
BP5233-33A / BP5234-33A
V
IN
=5V
9
2
V
O
V
IN
=5V
9
2
V
O
470µF
1000µF
10
3
1000µF
+
+
10
3
11
Control circuit
1
Control circuit
1
7
CTL signal
ON / OFF
CTL signal
ON / OFF
7
6
5
4
6
5
4
!Pin
descriptions
BP5232-25A , 5232-33A
Pin No.
1
2
3
4
5
Pin description
Feed back
BP5233-33A , BP5234-33A
Pin No.
6
7
9
10
Pin description
GND
CTL
V
IN
1
V
IN
2
Pin No.
1
2
3
4
5
Pin description
Feed back
Pin No.
6
7
9
10
11
Pin description
GND
CTL
V
IN
1
V
IN
2
V
IN
3
V
OUT
1
V
OUT
2
GND
GND
V
OUT
1
V
OUT
2
GND
GND
Pin 8 is removed.
Pin 8 is removed.
!Electrical
characteristics
BP5232-25A (Unless otherwise noted, V
lN
=5V, I
O
=1A, SW=1, Ta=25°C)
Parameter
Input voltage
Output voltage
Output current
Current consuption at no load
Load regulation
Output ripple voltage
Power conversion efficiency
CTL pin ON voltage
CTL pin OFF voltage
Symbol
V
IN
V
O
I
O
I
IN
∆V
O
υγ
η
V
ON
Min.
4.5
2.4
−
−
−
−
84
1.8
Typ.
5
2.5
−
200
13
33
89
−
Max.
5.5
2.6
2
300
33
150
−
−
Unit
V
V
A
µA
mV
mV
PP
%
V
I
O
=0.1A~2A
∗2
∗1
Conditions
Measurement circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
V
OFF
0.3
−
−
(Alternatively, when OPEN)
V
SW=2
Fig.1
∗1
Derating required according to the input voltage and ambient temperature.
∗2
Pulse noise not included.
470µF
+
+
BP5232-25A / BP5232-33A / BP5233-33A / BP5234-33A
Power Module
BP5232-33A (Unless otherwise noted, V
lN
=5V, I
O
=1A, SW=1, Ta=25°C)
Parameter
Input voltage
Output voltage
Output current
Current consuption at no load
Load regulation
Output ripple voltage
Power conversion efficiency
CTL pin ON voltage
CTL pin OFF voltage
Symbol
V
IN
V
O
I
O
I
IN
∆V
O
υγ
η
V
ON
Min.
4.5
3.17
−
−
−
−
88
1.8
Typ.
5
3.3
−
200
16
33
93
−
Max.
5.5
3.43
2
300
42
150
−
−
Unit
V
V
A
µA
mV
mV
PP
%
V
I
O
=0.1A~2A
∗2
∗1
Conditions
Measurement circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
Fig.1
V
OFF
0.3
−
−
(Alternatively, when OPEN)
V
SW=2
Fig.1
∗1
Derating required according to the input voltage and ambient temperature.
∗2
Pulse noise not included.
BP5233-33A (Unless otherwise noted, V
lN
=5V, I
O
=1.5A, SW=1, Ta=25°C)
Parameter
Input voltage
Output voltage
Output current
Current consuption at no load
Load regulation
Output ripple voltage
Power conversion efficiency
CTL pin ON voltage
CTL pin OFF voltage
Symbol
V
IN
V
O
I
O
I
IN
∆V
O
υγ
η
V
ON
Min.
4.5
3.17
−
−
−
−
88
1.8
Typ.
5
3.3
−
200
16
33
93
−
Max.
5.5
3.43
3
300
42
150
−
−
Unit
V
V
A
µA
mV
mV
PP
%
V
I
O
=0.1A~3A
∗2
∗1
Conditions
Measurement circuit
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
V
OFF
0.3
−
−
(Alternatively, when OPEN)
V
SW=2
Fig.2
∗1
Derating required according to the input voltage and ambient temperature.
∗2
Pulse noise not included.
BP5234-33A (Unless otherwise noted, V
lN
=3.3V, I
O
=2A, SW=1, Ta=25°C)
Parameter
Input voltage
Output voltage
Output current
Current consuption at no load
Load regulation
Output ripple voltage
Power conversion efficiency
CTL pin ON voltage
CTL pin OFF voltage
Symbol
V
IN
V
O
I
O
I
IN
∆V
O
υγ
η
V
ON
Min.
4.5
3.17
−
−
−
−
88
1.8
Typ.
5
3.3
−
200
16
33
93
−
Max.
5.5
3.43
4
300
42
150
−
−
Unit
V
V
A
µA
mV
mV
PP
%
V
I
O
=0.1A~4A
∗2
∗1
Conditions
Measurement circuit
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
Fig.2
V
OFF
0.3
−
−
(Alternatively, when OPEN)
V
SW=2
Fig.2
∗1
Derating required according to the input voltage and ambient temperature.
∗2
Pulse noise not included.
BP5232-25A / BP5232-33A / BP5233-33A / BP5234-33A
Power Module
!
Measurement circuit
BP5232-25A / BP5232-33A
10
9
2
SW
1
7
6
5
4
3
2
1
V
O
A
V
IN
A
1000µF / 50V
V
C2
C1
+
+
470µF / 50V
0.47µF
V
C3
f
f
: frequency counter
C1, C2 : Low impedance type
C3
: film capacitor
∗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.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.
BP5233-33A / BP5234-33A
11
10
9
2
SW
1
7
6
5
4
3
2
1
V
O
A
V
IN
A
1000µF / 50V
V
C1
+
470µF / 50V
C2
+
0.47µF
V
C3
f
: frequency counter
f
C1, C2 : Low impedance type
C3
: film capacitor
∗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.
BP5232-25A / BP5232-33A / BP5233-33A / BP5234-33A
Power Module
!
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 (pin 2, 3) and GND. (See Fig.5.)
Basic application
BP5232-25A / BP5232-33A
V
IN
10
9
7
6
5
4
3
2
1
BP5233-33A / BP5234-33A
V
O
V
IN
11
10
9
7
6
5
4
3
2
1
V
O
+
1000µF
+
470µF
+
1000µF
+
470µF
Fig.3
Output ON / OFF control
BP5232-25A / BP5232-33A
10
9
7
6
5
4
3
2
1
11
10
9
BP5233-33A / BP5234-33A
7
6
5
4
3
2
1
V
IN
SW
+
1000µF
+
470µF
V
O
V
IN
SW
+
1000µF
+
470µF
V
O
Fig.4
!
Application example
Output voltage fine adjustment
BP5232-25A / BP5232-33A
V
IN
10
9
7
6
5
4
3
2
1
BP5233-33A / BP5234-33A
V
O
'
R
1
V
IN
11
10
9
7
6
5
4
3
2
1
V
O
'
R
1
V
O
R
2
SW
+
1000µF
470µF
+
SW
+
1000µF
V
O
R
2
V
O
' value setting equations
R
1
V
O
'=V
O
1+
R
1
+R
2
≤
50kΩ
R
2
(
)
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
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