Rohm BP5232-25A Dc / dc converter Datasheet

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
Symbol
Input voltage
VIN
Output current
IO
Limits
BP5232-25A BP5232-33A BP5233-33A BP5234-33A
V
7
2∗
Unit
2∗
3∗
4∗
A
Operating temperature
Topr
−20 ~ +55
°C
Storage temperature
Tstg
−25 ~ +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
BP5232-25A / BP5232-33A / BP5233-33A / BP5234-33A
Power Module
!Block diagram
BP5233-33A / BP5234-33A
2
10
3
VO
VIN=5V
+
+
1000µF
9
470µF
+
1000µF
VIN=5V
9
2
10
3
VO
+
470µF
BP5232-25A / BP5232-33A
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
BP5233-33A , BP5234-33A
BP5232-25A , 5232-33A
Pin No.
Pin description
Pin No.
Pin No.
Pin description
1
Feed back
6
GND
1
2
VOUT1
7
CTL
3
VOUT2
9
4
GND
10
5
GND
Pin description
Pin No.
Pin description
Feed back
6
2
VOUT1
7
CTL
VIN1
3
VOUT2
9
VIN1
VIN2
4
GND
10
VIN2
5
GND
11
VIN3
Pin 8 is removed.
GND
Pin 8 is removed.
!Electrical characteristics
BP5232-25A (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
IIN
−
200
300
µA
∆VO
−
13
33
mV
Current consuption at no load
Load regulation
Typ.
Max.
Unit
Output ripple voltage
υγ
−
33
150
mVPP
Power conversion efficiency
η
84
89
−
%
VON
1.8
−
−
CTL pin ON voltage
CTL pin OFF voltage
VOFF
0.3
−
−
(Alternatively, when OPEN)
∗1 Derating required according to the input voltage and ambient temperature.
∗2 Pulse noise not included.
Conditions
Fig.1
Fig.1
∗1
Fig.1
Fig.1
IO=0.1A~2A
Fig.1
∗2
Fig.1
Fig.1
V
V
Measurement circuit
Fig.1
SW=2
Fig.1
BP5232-25A / BP5232-33A / BP5233-33A / BP5234-33A
Power Module
BP5232-33A (Unless otherwise noted, VlN=5V, IO=1A, 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
−
−
2
A
Current consuption at no load
IIN
−
200
300
µA
∆VO
−
16
42
mV
υγ
−
33
150
mVPP
η
88
93
−
%
Fig.1
VON
1.8
−
−
V
Fig.1
Load regulation
Output ripple voltage
Power conversion efficiency
CTL pin ON voltage
CTL pin OFF voltage
VOFF
0.3
−
−
(Alternatively, when OPEN)
V
Conditions
Measurement circuit
Fig.1
Fig.1
∗1
Fig.1
Fig.1
IO=0.1A~2A
Fig.1
∗2
Fig.1
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, VlN=5V, IO=1.5A, SW=1, Ta=25°C)
Parameter
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
−
−
3
A
IIN
−
200
300
µA
∆VO
−
16
42
mV
Output ripple voltage
υγ
−
33
150
mVPP
Power conversion efficiency
η
88
93
−
%
VON
1.8
−
−
Current consuption at no load
Load regulation
CTL pin ON voltage
CTL pin OFF voltage
VOFF
0.3
−
−
(Alternatively, when OPEN)
Conditions
Fig.2
Fig.2
∗1
Fig.2
Fig.2
IO=0.1A~3A
Fig.2
∗2
Fig.2
Fig.2
V
V
Measurement circuit
Fig.2
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, VlN=3.3V, IO=2A, SW=1, Ta=25°C)
Symbol
Min.
Typ.
Max.
Unit
Input voltage
Parameter
VIN
4.5
5
5.5
V
Fig.2
Output voltage
VO
3.17
3.3
3.43
V
Fig.2
Output current
IO
−
−
4
A
Current consuption at no load
IIN
−
200
300
µA
∆VO
−
16
42
mV
υγ
−
33
150
mVPP
η
88
93
−
%
Fig.2
VON
1.8
−
−
V
Fig.2
Load regulation
Output ripple voltage
Power conversion efficiency
CTL pin ON voltage
CTL pin OFF voltage
VOFF
0.3
−
−
(Alternatively, when OPEN)
∗1 Derating required according to the input voltage and ambient temperature.
∗2 Pulse noise not included.
V
Conditions
∗1
Measurement circuit
Fig.2
Fig.2
IO=0.1A~4A
Fig.2
∗2
Fig.2
SW=2
Fig.2
BP5232-25A / BP5232-33A / BP5233-33A / BP5234-33A
Power Module
!Measurement circuit
BP5232-25A / BP5232-33A
10
7
6
5
4
3
2
1
2
0.47µF
+
A
V
f
C3
+
C2
C1
V
VO
1
470µF / 50V
SW
1000µF / 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.
f
: frequency counter
C1, C2 : Low impedance type
C3
: film 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
9
7
6
5
4
3
2
1
2
0.47µF
+
A
V
f
C3
+
470µF / 50V
C2
V
VO
1
1000µF / 50V
SW
C1
A
10
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.
: frequency counter
f
C1, C2 : Low impedance type
C3
: film 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
VIN
10
9
7
6
5
4
3
BP5233-33A / BP5234-33A
2
1
VO
VIN
11
+
470µF
+
1000µF
10
9
7
6
5
4
3
2
1
VO
+
470µF
+
1000µF
Fig.3
Output ON / OFF control
BP5232-25A / BP5232-33A
10
9
7
6
5
4
3
BP5233-33A / BP5234-33A
2
1
11
VIN
10
9
7
6
5
4
3
2
1
VIN
VO
VO
SW
SW
+
1000µF
+
1000µF
+
470µF
+
470µF
Fig.4
!Application example
Output voltage fine adjustment
BP5232-25A / BP5232-33A
VIN
10
9
7
6
5
4
3
BP5233-33A / BP5234-33A
2
SW
1
VO'
470µF
+
9
7
6
5
4
3
2
1
VO'
R1
VO
R2
VO' value setting equations
R1
VO'=VO 1+
R1+R2 ≤ 50kΩ
R
2
10
+
1000µF
VO
R2
(
11
SW
R1
+
1000µF
VIN
)
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
BP5232-25A / BP5232-33A / BP5233-33A / BP5234-33A
Power Module
!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 electrical power 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 cancelled 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
cancelled by resupplying the power source, it may not be cancelled 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 leading 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 (BP5232-25A) 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 characteristic curves
BP5232-25A
0
OUTPUT CURRENT : IO (A)
CONVERSION EFFICIENCY : η (%)
50
AMBIENT TEMPERATURE : Ta (˚C)
Fig.6 Derating cureve
100
VIN=6.0V
70
60
50
40
30
20
10
0
0.5
1.0
1.5
OUTPUT CURRENT : IO (A)
Fig.7 Conversion efficiency
2.0
PW=1ms
50
PW
=1
00
m
s
20
s
1
VIN=5.0V
0m
2
80
=1
3
90
PW
4
VIN=4.0V
OUTPUT CURRENT INTO INPUT PIN (A)
100
5
10
5
TC=25°C
Single Pulse
2
1
0.1
0.5
1
5 7
VOLTAGE BETWEEN INPUT PIN
TO OUTPUT PIN (V)
Fig.8 Safe operation range
BP5232-25A / BP5232-33A / BP5233-33A / BP5234-33A
Power Module
BP5232-33A
2
1
0
50
100
90
80
VIN=5.0V
VIN=4.0V
VIN=6.0V
70
60
50
40
30
20
10
0
0.5
AMBIENT TEMPERATURE : Ta (˚C)
1.0
1.5
2.0
PW
=1
00
m
s
20
10
5
TC=25°C
Single Pulse
2
1
0.1
0.5
1
5 7
VOLTAGE BETWEEN INPUT PIN
TO OUTPUT PIN (V)
OUTPUT CURRENT : IO (A)
Fig.9 Derating curve
PW=1ms
50
s
m
3
OUTPUT CURRENT INTO INPUT PIN (A)
4
0
=1
CONVERSION EFFICIENCY : η (%)
100
PW
OUTPUT CURRENT : IO (A)
5
Fig.10 Conversion efficiency
Fig.11 Safe operation range
BP5233-33A
CONVERSION EFFICIENCY : η (%)
0
50
50
40
30
20
10
0
100
VIN=4.0V
60
0.5
AMBIENT TEMPERATURE : Ta (˚C)
1.0
1.5
2.0
2.5
3.0
PW
=1
00
m
s
20
10
5
TC=25°C
Single Pulse
2
1
0.1
0.5
1
5 7
VOLTAGE BETWEEN INPUT PIN
TO OUTPUT PIN (V)
OUTPUT CURRENT : IO (A)
Fig.12 Derating curve
PW=1ms
50
s
1
70
VIN=6.0V
0m
2
VIN=5.0V
80
=1
3
90
PW
OUTPUT CURRENT : IO (A)
4
OUTPUT CURRENT INTO INPUT PIN (A)
100
5
Fig.13 Conversion efficiency
Fig.14 Safe operation range
BP5234-33A
0
OUTPUT CURRENT : IO (A)
CONVERSION EFFICIENCY : η (%)
50
100
VIN=5.0V
70
VIN=6.0V
60
50
40
30
20
10
0
0.5
1.0 1.5
2.0
2.5
3.0
3.5 4.0
AMBIENT TEMPERATURE : Ta (˚C)
OUTPUT CURRENT : IO (A)
Fig.15 Derating curve
Fig.16 Conversion efficiency
PW=1ms
50
PW
=1
00
m
s
20
s
1
VIN=4.0V
0m
2
80
=1
3
90
PW
4
OUTPUT CURRENT INTO INPUT PIN (A)
100
5
10
5
TC=25°C
Single Pulse
2
1
0.1
0.5
1
5 7
VOLTAGE BETWEEN INPUT PIN
TO OUTPUT PIN (V)
Fig.17 Safe operation range
BP5232-25A / BP5232-33A / BP5233-33A / BP5234-33A
Power Module
!External dimensions (Units : mm)
T
T
Marked side
Marked side
H
4±1.0
• • •
• • • • •
0.5±0.1
1.3±0.2
P=2.54±0.2
0.25±0.05
L
H
T
BP5232-25A
28.0
19.5
12.0
BP5232-33A
28.0
19.5
12.0
BP5233-33A
32.5
23.5
11.0
BP5234-34A
38.5
23.5
11.0
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