ROHM BP5250

DC/DC converter
BP5250/BP5250-24
The BP5250/BP5250-24 are DC/DC converters for step-down that can drive PchFET using PWM system.
The voltage setting resistor and the combination of external power elements enable you to make any power
circuit to your liking. High-efficient DC/DC converter can be made easy by adding external components such
as I/O smoothing capacitor without designing circuit.
Applications
OA appliances(copy machine,personal computer, facsimile), AV appliances (car navigation, DVD etc.),
and industrial appliances.
Features
1) High power conversion(η=90% Vin=12V 5V/2A)
2) Power save pin(Leakage current at OFF mode : IR=10µAMAX)
3) Output voltage can be established from 1.5V to 9V in the VADJ pin.(For BP5250, however, output voltage is
limted by input voltage.)
4) With recovery type overcurrent protection function (Detection current can be established by the external
current detection resistance.)
5) Power circuit can be made easy by adding external smoothing capacitor and power element.
6) Reference voltage accuracy 1.25V±1%
Absolute maximum ratings (Ta=25°C)
Limits
Parameter
Symbol
Vi
Input voltage
ESD endurance
BP5250-24
24
30
V
DC
(EIAJ ED4701-1C-111A)
Vsurge
1
kV
Topr
−40 ∼ +85
°C
Operating temperature range
Condition
Unit
BP5250
Tstg
−50 ∼ +100
°C
Allowable max surface temperature
Tfmax
100
°C
Ambient temperature+The module self-heating ≤ Tfmax
The power saving terminal voltage
VCTL
V
Vi ≥ VCTL
Storage temperature range
24
30
Recommended operating conditions (Ta=25°C)
Parameter
Input voltage
BP5250
BP5250-24
Symbol
Vi
Min.
Typ.
Max.
Unit
8
12
16
V
20
24
27
V
1/11
BP5250 / BP5250-24
Block diagram
CONTROL CIRCUIT
OVER CURRENT
DETECTION CIRCUIT
DRIVE CIRCUIT
1
2
3
4
5
6
7
VCTL
Vi
SW
GND
IS
VO
VADJ
Pin descriptions
Pin No.
Pin name
1
VCTL
2
Vi
3
SW
4
GND
5
IS
6
Vo
7
VADJ
Function
Power save terminal.Setting the voltage on this terminal to Low or high impedance turns the
output OFF. Normally connect to Vi for use.
Input voltage terminal. Inserting a bypass capacitor of 0.1µF between this and pin 4 GND is
recommended.
Terminal to drive the external FET gate.
GND terminal. Connect the negative terminal of the I/O smoothing capacitor and the anode terminal
of the flywheel diode nearby.
Overcurrent detection terminal. The value of the resistor inserted between this and pin 6 sets the
output current capacity.
Output voltage monitor terminal.
Output voltage setting terminal. The values of the resistors inserted between this and pin 6 and
between this and GND set the output voltage capacity.
2/11
BP5250 / BP5250-24
Electrical characteristics (Unless otherwise noted, Vi=12V : BP5250, Vi=24V : BP5250-24, Ta=25°C)
Symbol
Min.
Typ.
Max.
Unit
Output ADJ Pin voltage
Parameter
VADJ
1.225
1.25
1.275
V
Over current detection
off set voltage1
VLT1
60
68
76
Over current detection
off set voltage2
VLT2
20
28
CTL pin ON voltage
VCTLH
2
CTL pin OFF voltage
Test Circuit
Conditions
VSW L→H
Fig.1
mV
VSW L→H VADJ=1.25V
Fig.2
36
mV
VSW L→H VADJ=0V
Fig.2
−
−
V
VSW H→L
Fig.3
VCTLL
−
−
1
V
VSW L→H
Fig.3
CTL sink current
ICTL
40
50
70
µA
VCTL=5V
Fig.3
Stand by current
ISTB
−
0
10
µA
VCTL=0V
Fig.3
Measurement circuit
BP5250 / BP5250-24
BP5250 / BP5250-24
VCTL
Vi
SW
GND
IS
Vo
VADJ
VCTL
Vi
SW
GND
IS
Vo
VADJ
1
2
3
4
5
6
7
1
2
3
4
5
6
7
Vi=12V : BP5250
Vi=24V : BP5250-24
Vi=12V : BP5250
Vi=24V : BP5250-24
VLT
L→H
L→H
VSW
5V
VADJ
Vi
VSW
5V
Fig.1 Output ADJ terminal voltage measurement circuit
Vi
VADJ
Over current detection off set voltage 1 : VADJ=1.25V
Over current detection off set voltage 2 : VADJ=0V
Fig.2 Over current detection off set voltage measurement circuit
BP5250 / BP5250-24
VCTL
Vi
SW
GND
IS
Vo
VADJ
1
2
3
4
5
6
7
A
Vi=12V : BP5250
Vi=24V : BP5250-24
A
ICTL
ISTB
VCTL
Vi
VSW
CTL sink current
Stad by current
VADJ
1.25V
: VCTL=5V
: VCTL=0V
Fig.3 Control terminal voltage sink current ·
Stand by sink current measurement circuit
3/11
BP5250 / BP5250-24
Application example
(1) Application circuit example is shown in the Fig.4.
R1 : Over-current detection resistance R1=0.068/I(0.068V : offset voltage)
Overcurrent protection characteristic
at R1=27mΩ is shown below.
BP5250 / BP5250-24
Vi
SW
GND
IS
Vo
VADJ
1
2
3
4
5
6
7
C4
Vin
SD1
C1
680µF/25V
R3 : 30kΩ
C3
L1
R1
22µH 27mΩ
Q1
Vout
R2
10kΩ
C2
680µF/16V
BP5250 over-current protection
characteristic (Vin=12V)
6.0
Output voltage [v]
VCTL
5.0
4.0
3.0
2.0
1.0
0
I
0
500
1000
1500
2000
Output current [mA]
2500
R2, R3 : Outpur voltage
Establishment example
establishment resistance Vo(V) R2(Ω) R3(Ω)
Fig.4
∗Application
Input voltage 12V
Output current 2A
Output voltage 5V
Q1 : 2SJ529S/Hitachi
SD : RB050L-40/ROHM
L1 : CDRH124-220L/Sumida
C1 : 680µF/25V(ZL series)/Rubycon
C2 : 680µF/10V(ZL series)/Rubycon
C3 : 0.1µF/16V
C4 : 0.1µF/25V
Vo=VADJ × (1+R3/R2)
(R2+R3≤55kΩ)
8.0
3.3k
18k
5.0
10k
30k
3.3
20k
33k
2.5
10k
10k
1.5
10k
2k
· There is a posibility that the C1 exceeds the allowable ripple current. Note the allowable ripple
current of the capacitor to be used.
· R2+R3≤55KΩ is recommended for R2,3 to make the most of output voltage accuracy.
· Output voltage range is limited by input voltage. Please refer to the Fig.8.
(2) When the load current is increased.
It is possible by arrangement in a parallel connecting
Q1, 2 and SD1,2
(3) When the power saving function is used.
The output is off when the VCTL pin is set to the
Low or high-impedance.
BP5250 / BP5250-24
BP5250 / BP5250-24
VCTL
Vi
SW
GND
IS
Vo
VADJ
VCTL
Vi
SW
GND
IS
Vo
VADJ
1
2
3
4
5
6
7
1
2
3
4
5
6
7
C4
Q1
Vin
R3
R3
L1
R1
C3
C2
Vout
R2
Q2
C1
SW
Vin
C1
C4
Q1
L1
SD1
R1
C3
C2
Vout
R2
SD1,2
Fig.5
Fig.6
· When Q1 and Q2 are connected parallel, use of a
device with small gate capacity is recommended.
Large gate capacity reduces the switching speed,
which may cause a larger FET loss, exceeding
the allowable loss value.
· When 2SJ529S is connected parallel, the rated load
current 3A is the maximum atVi=12V,Vo=5V
4/11
BP5250 / BP5250-24
Output voltage establishment range
Output voltage establishment range is changed by input voltage.Please refer to the Fig.8.
Vi−Vo characteristic
Output voltage
establishment [v]
30
24V
25
20
17V
15
5
BP5250
1.5V
0
6
BP5250-24
9V
10
8 10 12 14 16 18 20 22 24 26 28 30
Vi [V]
Fig.8
Caution note for operation
(1) Output voltage establishment range is changed by input voltage.Please refer to the Fig.8.
(2) Layout of external parts may significantly change the output spike noise or characteristics or cause abnomal
oscillation and temperature increase. Note the following for layout.
· Provide the input smoothing electroytic capacitor close to the FET source and pin 2 of the module.
· Provide the output smoothing electrolytic capacitor close to pin 6 of the module together with the
current detection resistor
· Large current may run into the coil, current detection resistor and output through the FET sourcedrain.Try to use a solid pattern as much as possible.
· FET drain, coil and flywheel diode may generate heat by power loss. Try to use a solid pattern so that the
heat may be released. Measure a rise in temperature of each element and make sure that it is not
abnormal.
· Provide the negative terminal of the I/O smoothing capacitor and anode terminal of the flywheel diode
close to GND pin 4 of the module.
· Connect the negative terminal of the I/O smoothing electrolytic capacitor and anode terminal of the
flywheel diode nearby.
(3) Output load may cause large ripple current in the I/O smoothing electrolytic capacitor. Note the allowable
ripple current of the capacitor to be used.
(4) As the output smoothing electrolytic capacitor, one with especially low impedance is recommended for
suppresing output ripple voltage. Select a capacitor suited for the use.
(5) Please be sure to use protection circuit function.(R1 should not be 0Ω.)
Output voltage establishment and application circuit example
BP5250-BP5250-24
VCTL
Vi
SW
GND
IS
Vo
VADJ
1
2
3
4
5
6
7
R3
C4
Vin
C1
Q1
L1
SD1
R1
C2
C3
∗Application example
Input voltage 12V
Output voltage 5V
Q1 : 2SJ529S/hitachi
SD : RB050L-40/ROHM
L1 : CDRH124-220L/Sumida
C1 : 680µF/25V(ZL seried)/Rubycon
C2 : 680µF/16V(ZL series)/Rubycon
C3 : 0.1µF/16V/ROHM
C4 : 0.1µF/25V/ROHM
R1 : 27mΩ/SUSUMU
R2 : 10kΩ/ROHM
R3 : 30kΩ/ROHM
Vout
R2
Fig.9
5/11
BP5250 / BP5250-24
(1) Output voltage and resistance
Estoblishment example
Output voltage Vo is determined by output ADJ pin voltage(VADJ) and R2, R3.
Vo=VADJ × (1+R3/R2)[V] VADJ=1.25V
Note) Please set the resistance to R2+R3≤55KΩ to make the best use of
this module performance.
Vo(V)
R2(Ω)
R3(Ω)
8.0
3.3k
18k
5.0
10k
30k
3.3
20k
33k
2.5
10k
10k
1.5
10k
2k
(2) FET(Q1)
FET is determined by taking the peak current flowed to the external FET, drain-source voltage(VDS),
ON resistance(RDS(ON)), input capacity(Ciss), allowable loss of package, and area of safe operation.
For the basic circuit example(Fig.9), FET of 2SJ529S/Hitachi is used.
Please use FET with the characteristic equal to or than this one.Especially, the input capacity(Ciss), and
ON resistance may cause a larger FET loss. Note the FET with the characteristic equal to or higher to be
used.
The characteristic of 2SJ529S is
VDS
=−60V
ID
=−10A
RDS(ON) =0.17ΩTYP(ID=−5A, VDS=−4V)
Pch
=20W(Tc=25°C)
Ciss
=580PF
(3) Inductor(L1)
inductor L1 is determined by the following expression in consideration of output ripple current.
L1≥n × (Vi-Vo)/Io × 1/f × Vo/Vi [H]
Vi : Input voltage [V]
Vo : Output voltage [V]
Io : Output current [A]
f : Oscillation frequency (£190KHz)
n : Ripple current condition
Io/n is ripple current. Normally, n=2.5∼5 is recommended.
L is determined from above.
Peak current flowed into the inductor by the determined L is
ip=Io+(Vi-Vo)/2 × 1/L1 × 1/f × (1-Vo/Vi) [A]
ip for actual usage is calculated back by the L of the expression above.
Ripple current ir by the determined L is
ir=(Vi-Vo)/L1 × 1/f × Vo/Vi [A]
As stated above, after L1[H] inductor and the ip[A] peak current are determined, an inductor for these
specifications can be determined. Output ripple voltage is determined by the multiplication of the ir[A] ripple
current and the impedance of the smoothing capacitor.
Vr=ir × Zc
Vr : Output ripple voltage [Vp-p]
Zc: Impedance of smoothing capacitor[Ω]
6/11
BP5250 / BP5250-24
(4) Flywhell diode(SD1)
· Rated current must be twice as much as the maximum overload
current(Iomax) or more.
· Rated voltage must be 1.3 times as much as the maximum input
voltage or more.
· Please use the high-speed switching schottky barrierdiode that
reverse recovery time is 50ns or less.
· If it used in high temperature, please be careful about the
temperature characteristics of IR.
VLT1 : Overcurrent offset voltage1(60∼76mV)
Iomax : Maximum overload current [A]
DC reverse vpltage [V]
40
30
20
10
0
5
10
15
20
Input voltage Vi [V]
25
30
Overcurrent protection characteristic
Output voltage [Vo]
(5) Overcurrent detection resisor(R1)
Overcurrent detection resistor is determined by the
following expression.
R1=VLT1/Iomax [mΩ]
Input voltage VS. DC reverse voltage
50
And, ISL current at short circuit is
Vo
ISL
Iomax
Output current [Io]
ISL=VLT2/R1 [A]
VLT2 : Overcurrent detection offset voltage2(20∼36mV)
From the above-mentioned, fold-back current characteristic when the overcurrent protection is
operated is shown. Both Iomax, and ISL may be different value from the actual value because they are
detected at the peak current. Please make sure to confirm it in the actual operating.
(6) Input smoothing capacitor(C1)
Large ripple current flow into the input smoothing capacitor. The current is determined by the following
expression. For actual usage, please use the larger one than this numeric value.
Irms=ir × Vo/3Vi +(ip-ir) × Vo/Vi [A]
Irms : Input ripple current actual-value [Arms]
ir
: Ripple current [A]
ip : Peak current [A]
V
: Input voltage [V]
Vo : Output voltage [V]
· Voltage of the used capacitor must be more than Vi × 2.
· Allowable ripple current of the used capacitor must be larger than the ripple current.
(7) Output smoothing capacitor(C2)
Output smoothing capacitor is determined by the impedance of smoothing capacitor from the mark value of
output ripple voltage.
Zc≤Vr/ir [Ω]
Zc : Impedance of capacitor [Ω]
Vr : Mark value of output ripple voltage[Vp-p]
ir : Ripple current [A]
· Voltage of the used capacitor must be more than Vo × 2.
· Allowable ripple current of the used capacitor must be larger than the ripple current.
7/11
BP5250 / BP5250-24
External dimensions (Units : mm)
5.2Max.
4±1.0
13.0Max.
20.0Max.
1
2
3
4
5
P=2.54±0.2
6
7
0.5±0.1
1.3±0.2
0.255±0.05
2.7Max.
3.0Max.
2.5Max.
2.54×6=15.24
SIP9
8/11
BP5250 / BP5250-24
BP5250 external reference components
Input voltage12V
Outpur current
output voltage
Note
1A
1.5V±3%
2.5V±3%
3.3V±3%
5V±3%
8V±3%
Q1
CPH6306
CPH6306
CPH6306
CPH6306
CPH6306
SD1
RB050L-40
RB050L-40
RB050L-40
RB050L-40
RB050L-40
17∼34µH±10%
26∼52µH±10%
31∼63µH±10%
38∼77µH±10%
35∼70µH±10%
1.3A or higher
1.3A or higher
1.3A or higher
1.4A or higher
1.5A or higher
L1
C1
C2
C3
C4
R1
220∼4700µF
220∼4700µF
220∼4700µF
220∼4700µF
330∼4700µF
0.3Arms or higher 0.3Arms or higher 0.3Arms or higher 0.3Arms or higher 0.3Arms or higher Allowable ripple currnt
220∼1000µF
220∼1000µF
220∼1000µF
220∼1000µF
220∼1000µF
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/25V (R)
0.1µF/25V (R)
0.1µF/25V (R)
0.1µF/25V (R)
0.1µF/25V (R)
56mΩ±5% less than 56mΩ±5% less than 56mΩ±5% less than 56mΩ±5% less than 56mΩ±5% less than
R2
10kΩ±1%
10kΩ±1%
20kΩ±1%
10kΩ±1%
3.3kΩ±1%
R3
2kΩ±1%
10kΩ±1%
33kΩ±1%
30kΩ±1%
18kΩ±1%
1.5V±3%
2.5V±3%
3.3V±3%
5V±3%
8V±3%
Outpur current
output voltage
Note
2A
Q1
2SJ529S
2SJ529S
2SJ529S
2SJ529S
2SJ529S
SD1
RB050L-40
RB050L-40
RB050L-40
RB050L-40
RB050L-40
L1
C1
C2
9∼17µH±10%
13∼26µH±10%
16∼31µH±10%
19∼38µH±10%
17∼35µH±10%
Rated current
2.5A or higher
2.5A or higher
2.5A or higher
2.5A or higher
2.6A or higher
Allowable ripple currnt
0.8Arms or higher
1Arms or higher
1Arms or higher
330∼4700µF
330∼4700µF
330∼4700µF
1.5Arms or higher 1.8Arms or higher
680∼4700µF
680∼4700µF
560∼1500µF
560∼1500µF
560∼1500µF
560∼1500µF
560∼1500µF
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
C4
0.1µF/25V (R)
0.1µF/25V (R)
0.1µF/25V (R)
0.1µF/25V (R)
0.1µF/25V (R)
27mΩ±5% less than 27mΩ±5% less than 27mΩ±5% less than 27mΩ±5% less than 27mΩ±5% less than
R2
10kΩ±1%
10kΩ±1%
20kΩ±1%
10kΩ±1%
3.3kΩ±1%
R3
2kΩ±1%
10kΩ±1%
33kΩ±1%
30kΩ±1%
18kΩ±1%
1.5V±3%
2.5V±3%
3.3V±3%
5V±3%
8V±3%
Outpur current
output voltage
Allowable ripple currnt
0.6Arms or higher 0.6Arms or higher 0.6Arms or higher 0.6Arms or higher 0.7Arms or higher
C3
R1
Rated current
0.4Arms or higher 0.5Arms or higher 0.6Arms or higher 0.7Arms or higher 0.9Arms or higher Allowable ripple currnt
Note
3A
Q1
2SJ529S×2
2SJ529S×2
2SJ529S×2
2SJ529S×2
2SJ529S×2
SD1
RB050L-40×2
RB050L-40×2
RB050L-40×2
RB050L-40×2
RB050L-40×2
6∼11µH±10%
9∼17µH±10%
10∼21µH±10%
13∼26µH±10%
12∼23µH±10%
Rated current
3.7A or higher
3.7A or higher
3.8A or higher
3.8A or higher
3.9A or higher
Allowable ripple currnt
L1
C1
C2
C3
C4
R1
1.2Arms or higher 1.5Arms or higher 1.8Arms or higher 2.2Arms or higher 2.7Arms or higher
470∼4700µF
680∼4700µF
680∼4700µF
1000∼4700µF
0.8Arms or higher 0.9Arms or higher 0.9Arms or higher 0.9Arms or higher
1500∼4700µF
Allowable ripple currnt
1Arms or higher
680∼1500µF
680∼1500µF
680∼1500µF
680∼1500µF
680∼1500µF
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/25V (R)
0.1µF/25V (R)
0.1µF/25V (R)
0.1µF/25V (R)
0.1µF/25V (R)
18mΩ±5% less than 18mΩ±5% less than 18mΩ±5% less than 18mΩ±5% less than 18mΩ±5% less than
R2
10kΩ±1%
10kΩ±1%
20kΩ±1%
10kΩ±1%
3.3kΩ±1%
R3
2kΩ±1%
10kΩ±1%
33kΩ±1%
30kΩ±1%
18kΩ±1%
9/11
BP5250 / BP5250-24
BP5250-24 external referene components
Input voltage24V
Output current
Output voltage
Note
1A
1.5V±3%
2.5V±3%
3.3V±3%
5V±3%
8V±3%
Q1
CPH6306
CPH6306
CPH6306
CPH6306
CPH6306
SD1
RB050L-40
RB050L-40
RB050L-40
RB050L-40
RB050L-40
18∼37µH±10%
30∼59µH±10%
37∼75µH±10%
52∼105µH±10%
70∼140µH±10%
1.3A or higher
1.3A or higher
1.3A or higher
1.3A or higher
1.3A or higher
L1
C1
C2
C3
C4
R1
33∼4700µF
100∼4700µF
100∼4700µF
100∼4700µF
100∼4700µF
0.3Arms or higher 0.3Arms or higher 0.3Arms or higher 0.3Arms or higher 0.3Arms or higher Allowable ripple current
220∼1000µF
220∼1000µF
220∼1000µF
220∼1000µF
220∼1000µF
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/50V (R)
0.1µF/50V (R)
0.1µF/50V (R)
0.1µF/50V (R)
0.1µF/50V (R)
56mΩ±5% less than 56mΩ±5% less than 56mΩ±5% less than 56mΩ±5% less than 56mΩ±5% less than
R2
10kΩ±1%
10kΩ±1%
20kΩ±1%
10kΩ±1%
3.3kΩ±1%
R3
2kΩ±1%
10kΩ±1%
33kΩ±1%
30kΩ±1%
18kΩ±1%
1.5V±3%
2.5V±3%
3.3V±3%
5V±3%
8V±3%
Output current
Output voltage
Note
2A
Q1
2SJ529S
2SJ529S
2SJ529S
2SJ529S
2SJ529S
SD1
RB050L-40
RB050L-40
RB050L-40
RB050L-40
RB050L-40
9∼18µH±10%
15∼30µH±10%
19∼38µH±10%
26∼52µH±10%
35∼70µH±10%
2.5A or higher
2.5A or higher
2.5A or higher
2.5A or higher
L1
C1
C2
0.6Arms or higher 0.7Arms or higher 0.8Arms or higher
100∼4700µF
100∼4700µF
220∼4700µF
1Arms or higher
220∼4700µF
2.5A or higher
220∼4700µF
0.6Arms or higher 0.6Arms or higher 0.6Arms or higher 0.6Arms or higher 0.6Arms or higher Allowable ripple current
560∼1500µF
560∼1500µF
560∼1500µF
560∼1500µF
560∼1500µF
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
C4
0.1µF/50V (R)
0.1µF/50V (R)
0.1µF/50V (R)
0.1µF/50V (R)
0.1µF/50V (R)
27mΩ±5% less than 27mΩ±5% less than 27mΩ±5% less than 27mΩ±5% less than 27mΩ±5% less than
R2
10kΩ±1%
10kΩ±1%
20kΩ±1%
10kΩ±1%
3.3kΩ±1%
R3
2kΩ±1%
10kΩ±1%
33kΩ±1%
30kΩ±1%
18kΩ±1%
1.5V±3%
2.5V±3%
3.3V±3%
5V±3%
8V±3%
Output current
Output voltage
Note
3A
Q1
2SJ529S×2
2SJ529S×2
2SJ529S×2
2SJ529S×2
2SJ529S×2
SD1
RB050L-40×2
RB050L-40×2
RB050L-40×2
RB050L-40×2
RB050L-40×2
L1
C1
C2
C3
C4
R1
Rated current
1.3Arms or higher Allowable ripple current
C3
R1
Rated current
0.3Arms or higher 0.4Arms or higher 0.4Arms or higher 0.5Arms or higher 0.7Arms or higher Allowable ripple current
6∼12µH±10%
10∼20µH±10%
13∼25µH±10%
17∼35µH±10%
23∼47µH±10%
3.8A or higher
3.8A or higher
3.8A or higher
3.8A or higher
3.8A or higher
0.9Arms or higher
1Arms or higher
220∼4700µF
220∼4700µF
Rated current
1.2Arms or higher 1.5Arms or higher 1.9Arms or higher Allowable ripple current
220∼4700µF
470∼4700µF
470∼4700µF
0.9Arms or higher 0.9Arms or higher 0.9Arms or higher 0.9Arms or higher 0.9Arms or higher Allowable ripple current
680∼1500µF
680∼1500µF
680∼1500µF
680∼1500µF
680∼1500µF
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/16V (R)
0.1µF/25V (R)
0.1µF/25V (R)
0.1µF/25V (R)
0.1µF/25V (R)
0.1µF/25V (R)
18mΩ±5% less than 18mΩ±5% less than 18mΩ±5% less than 18mΩ±5% less than 18mΩ±5% less than
R2
10kΩ±1%
10kΩ±1%
20kΩ±1%
10kΩ±1%
3.3kΩ±1%
R3
2kΩ±1%
10kΩ±1%
33kΩ±1%
30kΩ±1%
18kΩ±1%
10/11
Precautions on Use of ROHM Power Module
Safety Precautions
1) The products are designed and produced for application in ordinary electronic equipment (AV equipment,
OA equipment, telecommunication equipment, home appliances, amusement equipment etc.).
If the products are to be used in devices requiring extremely high reliability (medical equipment, transport
equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or operational error may endanger human life
and sufficient fail-safe measures, please consult with the Company's sales staff in advance. If product
malfunctions may result in serious damage, including that to human life, sufficient fail-safe measures
must be taken, including the following:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits in the case of single-circuit failure
2) The products are designed for use in a standard environment and not in any special environments.
Application of the products in a special environment can deteriorate product performance. Accordingly,
verification and confirmation of product performance, prior to use, is recommended if used under the
following conditions:
[a] Use in various types of liquid, including water, oils, chemicals, and organic solvents
[b] Use outdoors where the products are exposed to direct sunlight, or in dusty places
[c] Use in places where the products are exposed to sea winds or corrosive gases, including
Cl2, H2S, NH3, SO2, and NO2
[d] Use in places where the products are exposed to static electricity or electromagnetic waves
[e] Use in proximity to heat-producing components, plastic cords, or othe flammable items
[f] Use involving sealing or coating the products with resin or other coating materials
[g] Use involving unclean solder or use of water or water-soluble cleaning agents for cleaning after
soldering
[h] Use of the products in places subject to dew condensation
3) The products are not radiation resistant.
4) The Company is not responsible for any problems resulting from use of the products under conditions not
recommended herein.
5) The Company should be notified of any product safety issues. Moreover, product safety issues should be
periodically monitored by the customer.
Precautions Regarding Application Example and External Circuits
1) If change is made to the constant of an external circuit, allow a sufficient margin due to variations of the
characteristics of the products and external components, including transient characteristics, as well as
static characteristics. Please be informed that the Company has not conducted investigations on whether
or not particular changes in the application examples or external circuits would result in the infringement
of patent rights of a third party.
2) The application examples, their constants, and other types of information contained herein are applicable
only when the products are used in accordance with standard methods.
Therefore, if mass production is intended, sufficient consideration to external conditions must be made.
Prohibitions Regarding Industrial Property
1) These Specifications contain information related to the Company’s industrial property. Any use of them
other than pertaining to the usage of appropriate products is not permitted. Duplication of these
Specifications and its disclosure to a third party without the Company’s permission is prohibited.
2) Information and data on products, including application examples, contained in these specifications are
simply for reference; the Company does not guarantee any industrial property rights, intellectual property
rights, or any other rights of a third party regarding this information or data. Accordingly, the Company
does not bear any responsibility for:
[a] infringement of the intellectual property rights of a third party
[b] any problems incurred by the use of the products listed herein.
3) The Company prohibits the purchaser of its products to exercise or use the intellectual property rights,
industrial property rights, or any other rights that either belong to or are controlled by the Company, other
than the right to use, sell, or dispose of the products.
11/11
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 use silicon as a basic material.
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-Rev1.0