Cosel TUNS300 Instructions for use

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of our knowledge, accurate. However, we assume no liability for any product failures or
damages, immediate or consequential, resulting from the use of the information provided
herein. Our products are not intended for use in systems in which failures of product could
result in personal injury. All trademarks mentioned herein are property of their respective
owners. All specifications are subject to change without notice.
Application Manual
TUNS 300/500/700
Cosel
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Rev. 1.4E
08-Jan-2016
Applications Manual
for TUNS300/500/700

Applications Manual for TUNS300/500/700
1. Pin Assignment
Pin Assignment
2. Connection for Standard Use
Connection for standard use
Input fuse :
F11
Input capacitor :
C11
Y capacitors and noise filters :
CY,CX,L1
Output capacitors :
Co,C40
Smoothing capacitor for boost voltage :
Cbc
Capacitor for boost voltage :
C20,C30
Inrush current limiting resistor :
TFR1
Discharging resistor :
R1
3. Derating
Output current derating
Input voltage derating
4.Output voltage adjustment
Output voltage adjustment
Output voltage adjustment by potentiometer
Output voltage adjustment by e ternal voltage
. Parallel operation (option :-P)
Parallel operation
6. Operation under low temperature conditions
Ripple voltage of boost voltage
7. Holdup time
Holdup time
8. Mounting method
Mounting method
9.Thermal Design
Thermal Design
E amples of Convection cooling
E amples of Forced air cooling
10. Board layout
Consideration for board layout
Reference PCB layout
11. Example of
which reduces EMI
Means of the EMI reduction
Switching frequency noise reduction (200kHz)
High frequency band noise reduction (more than 10 MHz)
EMI measure e ample
Note ： Information contained in this document is subject to change without notice for improvement.
The materials are intended as a reference design, component values and circuit examples
described in this document varies depending on operating conditions and component variations.
Please select the components and design under consideration of usage condition etc.
11.2
A- 9
11.3
A- 9
11.4
A- 9
10.2
A- 8
A- 9
11.1
A- 9
8.1
A-17
A-18
9.1
A-18
A-16
7.1
A-16
A-17
A-13
5.1
A-13
A-14
6.1
A-14
4.1
A-10
4.2
A-10
4.3
A-1
A-8
3.1
A-8
3.2
A-9
A-10
2.7
A-5
2.8
A-6
2.9
A-7
2.4
A-4
2.5
A-4
2.6
A-5
A-
2.1
A-
2.2
A-3
2.3
A-3
Contents
Page
A-1
1.1
A-1
A-18
A- 0
9.2
9.3
A- 4
10.1
A- 4

1.1 Pin Assignment
Fig.1.1
Pin Assignment
Table 1.1
Pin configu ation
and function
A-1
⑪ IOG Inverter operation monitor
- FG Mounting hole(FG)
⑨ +S Remote sensing(+)
⑩ TRM Adjustment of output voltage
⑦ -VOUT -DC output
⑧ -S Remote sensing(-)
⑤ -BC -BC output
⑥ +VOUT +DC output
③ R E ternal resistor for inrush current protection
④ +BC +BC output
No. Pin
Connection Function
① AC1 AC input
② AC2
2.1 Pin configuration
1. Pin Assignment
Applications Manual
TUNS300/500/700

2.1 Connection for standard use
■
■
Fig.2.1
Connection fo
standa d use
Table 2.1
Components
name
・ Parts name are shown in Table 2.1 as reference.
・ E ternal parts should be changed according to the ambient temperature, and
input and output conditions.
For details, refer to the selection method of individual parts.
To use the TUNS300/500/700 series, e ternal components should be connected as shown
in Fig.2.1.
The TUNS300/500/700 series should be conduction-cooled. Use a heatsink or fan to
dissipate heat.
A-2
Heatsink
2.1 Pin configuration
2. Connecrion for Standard Use
Rating Part name Rating Part name Rating Part name
1 F11 AC250V/10A 0325010
(Littelfuse)
AC250V/15A 0325015
(Littelfuse)
AC250V/15A 0325015
(Littelfuse)
2 C11 AC275V/2.2uF ECQUAAF225
(Panasonic) AC275V/2.2uF ECQUAAF225 (Panasonic) AC275V/1.5uF
× 2parallel ECQUAAF155
× 2 (parallel)
(Panasonic)
3 CY1 AC250V/2200pF DE1E3KX222M
(Murata Manufacturing) AC250V/2200pF DE1E3KX222M (Murata Manufacturing) AC250V/2200pF DE1E3KX222M (Murata Manufacturing)
4 L11 6mH/12A ADM-25-12-060T
(Ueno) 6mH/12A ADM-25-12-060T
(Ueno) 6mH/12A ADM-25-12-060T
(Ueno)
5 L12 6mH/12A ADM-25-12-060T
(Ueno)
6mH/12A ADM-25-12-060T
(Ueno)
6mH/12A ADM-25-12-060T
(Ueno)
6 CX1 AC275V/1.5uF ECQUAAF155
(Panasonic) AC275V/1.5uF ECQUAAF155 (Panasonic) AC275V/1.5uF ECQUAAF155 (Panasonic)
7 CX2 AC275V/1.5uF ECQUAAF155
(Panasonic) AC275V/1.5uF ECQUAAF155
(Panasonic) AC275V/1.5uF ECQUAAF155
(Panasonic)
8 CY2 AC250V/2200pF DE1E3KX222M
(Murata Manufacturing)
AC250V/2200pF DE1E3KX222M
(Murata Manufacturing)
AC250V/2200pF DE1E3KX222M
(Murata Manufacturing)
9 CY3 AC250V/2200pF DE1E3KX222M
(Murata Manufacturing) AC250V/2200pF DE1E3KX222M (Murata Manufacturing) AC250V/2200pF DE1E3KX222M (Murata Manufacturing)
F12 DC25V/2200uF ELXZ250ELL222
(Nippon Chemi-Con) DC25V/2200uF ELXZ250ELL222
(Nippon Chemi-Con) DC25V/2200uF ELXZ250ELL222
(Nippon Chemi-Con)
F28 DC50V/1000uF ELXZ500ELL102
(Nippon Chemi-Con) DC50V/1000uF ELXZ500ELL102 (Nippon Chemi-Con) DC50V/1000uF ELXZ500ELL102 (Nippon Chemi-Con)
F48 DC63V/470uF ELXZ630ELL471
(Nippon Chemi-Con)
DC63V/470uF ELXZ630ELL471
(Nippon Chemi-Con)
DC63V/470uF ELXZ630ELL471
(Nippon Chemi-Con)
F12 DC25V/10uF GRM31CR71E106
(Murata Manufacturing) DC25V/10uF GRM31CR71E106 (Murata Manufacturing) DC25V/10uF GRM31CR71E106 (Murata Manufacturing)
F28 DC50V/4.7uF GRM31CR71H475
(Murata Manufacturing) DC50V/4.7uF GRM31CR71H475
(Murata Manufacturing) DC50V/4.7uF GRM31CR71H475
(Murata Manufacturing)
F48 DC100V/2.2uF GRM31CR72A225
(Murata Manufacturing)
DC100V/2.2uF GRM31CR72A225
(Murata Manufacturing)
DC100V/2.2uF GRM31CR72A225
(Murata Manufacturing)
12 Cbc DC450V/470uF ELXS451VSN471
(Nippon Chemi-Con) DC450V/390uF ×2parallel ELXS451VSN391 × 2 (parallel) (Nippon Chemi-Con) DC450V/390uF ×2parallel ELXS451VSN391 × 2 (parallel) (Nippon Chemi-Con)
13 C20
DC450V/0.68uF
×2parallel AFS450V684K × 2 (parallel) (OKAYA ELECTRIC INDUSTRIES) DC450V/0.68uF ×2parallel AFS450V684K × 2 (parallel) (OKAYA ELECTRIC INDUSTRIES) DC450V/0.68uF ×2parallel AFS450V684K × 2 (parallel) (OKAYA ELECTRIC INDUSTRIES)
14 C30
DC450V/0.68uF
×2parallel
AFS450V684K × 2 (parallel)
(OKAYA ELECTRIC INDUSTRIES)
DC450V/0.68uF
×2parallel
AFS450V684K × 2 (parallel)
(OKAYA ELECTRIC INDUSTRIES)
DC450V/0.68uF
×2parallel
AFS450V684K × 2 (parallel)
(OKAYA ELECTRIC INDUSTRIES)
15 TFR1 10Ω F5K-100J14
(TAMURA THERMAL DEVICE)
10Ω F5K-100J14
(TAMURA THERMAL DEVICE)
10Ω F5K-100J14
(TAMURA THERMAL DEVICE)
16 R1
68kΩ
×3series
2parallel
CRS32 683
(HOKURIKU ELECTRIC INDUSTRY)
68kΩ
×3series
2parallel
CRS32 683
(HOKURIKU ELECTRIC INDUSTRY)
68kΩ
×3series
2parallel
CRS32 683
(HOKURIKU ELECTRIC INDUSTRY)
17
SK11
SK21
SK22
620V TND14V-621K
(Nippon Chemi-Con) 620V TND14V-621K (Nippon Chemi-Con) 620V TND14V-621K (Nippon Chemi-Con)
18 S 11 4kV DSA-402MA
(Mitsubishi Materials)
4kV DSA-402MA
(Mitsubishi Materials)
4kV DSA-402MA
(Mitsubishi Materials)
No. Symbol Item TUNS300F TUNS500F
Input fuse
Input capacitor
Y capacitor
Noise
filter
Line Filter
X capacitor
Y capacitor
10 Co Output
capacitor
11 C40 Bypass
capacitor
Smoothing
capacitor
Capacitor
for boost voltage
Capacitor
for boost voltage
Surge absorber
TUNS700F
Inrush current
protection resistor
Discharging
resistor
Varistor
AC1
AC2
+VOUT
-VOUT
-BCFG
F11
+BC
Co
+
Load
C40
AC
INPUT
L11
CY2
CX1
SK11
SK21
SA11
CX2
CY3
L12
SK22
Noise
Fil er
C11
-S
+S
R
+ C30 TFR1
Cbc
C20 CY1
R1
FG
Applications Manual
TUNS300/500/700

2.2 Input fuse: F11
■
No protective fuse is preinstalled on the input side. To protect the unit, install a slow-blow
type fuse shown in Table 2.2 in the input circuit.
Table 2.2
Recommended
fuse
2.3 Input capacitor: C11
■
Connect a film capacitor of 2 uF or higher as input capacitor C11.
■
Use a capacitor with a rated voltage of AC250V which complies with the safety standards.
■
If C11 is not connected, the power supply or e ternal components could be damaged.
■
When selecting a capacitor, check the ma imum allowable ripple current.
■
Ripple current includes low frequency component (input frequency) and high frequency
component (100kHz).
■
Ripple current values flowing into C11 as listed in Table 2.1 are shown in Fig.2.2.
■
The ripple current changes with PCB patterns, e ternal parts, ambient temperature, etc.
Check the actual ripple current value flowing through C11.
Fig.2.2
Ripple cu ent
values
C11
Rated current 10A 15A 15A
A-3
Model TUNS300F TUNS500F TUNS700F
Applications Manual
TUNS300/500/700

2.4 Y Capacitors and noise filters: CY, CX, L1
■
The TUNS300/500/700 series has no internal noise filter.
Connect e ternal noise filters and capacitors (CY) to reduce conduction noise and stabilize
the operation of the power supply.
■
Noise filters should be properly designed when the unit must conform to the EMI/EMS
standards or when surge voltage may be applied to the unit.
■
Install the primary Y capacitor (CY1) as close as possible to the input pins (within 50 mm
from the pins).
A capacitance of 470 pF or more is required.
■
When the total capacitance of CYs e ceeds 8,800 pF, input-output withstanding voltage
may be dropped. In this case, either reduce the capacitance of Y capacitors or install a
grounding capacitor between output and FG.
■
Use capacitors with a rated voltage of AC250V which comply with the safety standards
as CY.
2. Output capacitors: Co, C40
■
Install an e ternal capacitor, Co, between +VOUT and -VOUT pins for stable operation
of the power supply. Recommended capacitance of Co is shown in Table 2.3.
■
Use low impedance electrolytic capacitors with e cellent temperature characteristics.
■
When Using at ambient temperatures below 0 ºC, the output ripple voltage increases due
to the characteristics of equivalent series resistor (ESR). In this case, connect three
capacitors, Co, of recommended capacitance in parallel connection.
■
Specifications, output ripple and ripple noise as evaluation data values are measured
according to Fig.2.3.
Table 2.3
Recommended
capacitance
Co
Fig.2.3
Measu ing
envi onment
48V 470uF 470uF 470uF
A-4
12V 2,200uF 2,200uF 2,200uF
28V 1,000uF 1,000uF 1,000uF
Output Voltage TUNS300F TUNS500F TUNS700F
R=50Ω
C=0.01uF
Load
1.5m 50Ω
Coaxial Cable
C40:
12V 10µF
28V 4.7µF
48V 2.2µF
+VOUT
-VOUT
-
+
0
0
0
0
Co
+
C40
50mm
Oscilloscope
BW:100MHz
R
C
Applications Manual
TUNS300/500/700

2.6 Smoothing capacitor for boost voltage: Cbc
■
In order to smooth boost voltage, connect Cbc between +BC and -BC.
Recommended capacitance of Cbc is shown in Table 2.4.
■
Install a capacitor Cbc with a rated voltage of DC420 V or higher within the allowable
capacitance.
■
When operated below 0ºC, operation may become unstable as boost ripple voltage
increases due to ESR characteristics. Choose a capacitor which has higher capacitance
than recommended.
Select a capacitor so that the ripple voltage of the boost voltage is 30 Vp-p or below.
■
If the ripple voltage of the boost voltage increases, the ripple current rating of the
smoothing capacitor may be e ceeded. Check the ma imum allowable ripple current of
the capacitor.
■
The ripple current changes with PCB patterns, e ternal parts, ambient temperature, etc.
Check the actual ripple current value flowing through Cbc.
Table 2.4
Recommended
capacitance
Cbc
※
Refer to item 6 and 7 for selection method of Cbc.
2.7
Capacitor for boost voltage :C20,C30
■
Install film capacitors with a rating of 1uF/DC450V or higher as C20 and C30.
■
If C20 and C30 are not connected, the power supply or e ternal components could be
damaged.
■
The ripple current flows into these capacitors. Check the ma imum allowable ripple
current of the capacitor while selecting.
■
The frequency of the ripple current is 100 kHz to 200 kHz.
■
Ripple current values flowing into C20 and C30 as listed in Table 2.1 are shown in
Fig.2.4 and Fig.2.5.
■
The ripple current changes with PCB patterns, e ternal parts, ambient temperature, etc.
Check the actual ripple current values flowing through C20 and C30.
Fig.2.4
Ripple cu ent
values
C20
※
Ripple current value is total of 2 paralleled capacitors.
TUNS700F 390uF × 2 pa allel 470uF ~ 2,200uF
A-5
TUNS300F 470uF 390uF ~ 2,200uF
TUNS500F 390uF × 2 pa allel 390uF ~ 2,200uF
Model Recommended capacitance Allowable capacitance range
0
500
1000
1500
2000
2500
3000
3500
0 20 40 60 80 100 120
R
i
p
p
l
e
c
u
r
r
e
n
t
[
m
A
r
m
s
]
Output current [%]
TUNS300F(100VAC)
TUNS300F(200VAC)
TUNS500F(100VAC)
TUNS500F(200VAC)
TUNS700F(100VAC)
TUNS700F(200VAC)
Applications Manual
TUNS300/500/700

Fig.2.5
Ripple cu ent
values
C30
※
Ripple current value is total of 2 paralleled capacitors.
2.8 Inrush current limiting resistor: TFR1
■
The TUNS300/500/700 must connect TFR1.
■
If TFR1 is not connected, the power supply will not operate.
■
Connect TFR1 between R and +BC.
Recommended resistance of TFR1 is shown in Table 2.5.
■
The surge capacity is required for TFR1.
■
Wirewound resistor with thermal cut-offs type is required.
■
Therefore, we don’t recommend connecting a large resistance as TFR1.
■
The inrush current changes by PCB pattern, parts characteristic etc.
Check the actual inrush current value flowing through the AC line.
Table 2.5
Recommended
esisto
TFR1
■
The selection method of TFR1 is shown below.
・
Calculation of resistance
Resistance can be calculated using the following formula.
TFR1
:
Inrush current limiting resistor
RL
:
Line impedance
Vin
:
Input voltage (rms)
Ip
:
Primary Inrush current (peak)
・
Calculation of required surge capacity
Required surge capacity can be calculated using the following formula.
Please contact to the component manufacturer regarding the surge current withstanding capability.
I2t
:
urrent squared times
TFR1
:
Inrush current limiting resistor
bc
:
Smoothing capacitor for boost voltage
Vin
:
Input voltage (rms)
A-6
TUNS300F 4.7 Ω ~ 22 Ω
TUNS500F 4.7 Ω ~ 22 Ω
TUNS700F 4.7 Ω ~ 22 Ω
Model Recommended re i tance
Inrush current limiting resistor can be used to limit the primary inrush current. However, the
secondary inrush current can’t be limited by increasing the resistor value of inrush current
limiting resistor. The secondary inrush current is appro . 25 ~ 30A.
][
1
2
2
2
sA
TFR
VinCbc
tI × =
][
2
1Ω−
×
=
L
R
Ip
Vin
TFR
0
500
1000
1500
2000
2500
3000
3500
0 20 40 60 80 100 120
R
i
p
p
l
e
c
u
r
r
e
n
t
[
m
A
r
m
s
]
Output current [%]
TUNS300F(100VAC)
TUNS300F(200VAC)
TUNS500F(100VAC)
TUNS500F(200VAC)
TUNS700F(100VAC)
TUNS700F(200VAC)
Applications Manual
TUNS300/500/700

2.9 Discharging resistor: R1
■
If you need to meet the safety standards, connect a discharging resistor R1 at input
interphase.
■
Please select a resistor so that the input interphase voltage decreases in 42.4V or less
at 1 second after turn off the input.
■
Fig.2.6 shows the relationship between a necessary resistance of R1 and total capacitance
of input interphase capacitors.
And the data of Fig.2.6 is the values that assumed the worst condition.
■
Please keep margin for rated voltage and power of R1.
Fig.2.6
TUNS500F
Relationship
between
a necessa y
esistance of R1
and total
capacitance of
input inte phase
capacito s
A-7
0
50
100
150
200
250
300
350
400
450
0 1 2 3 4 5 6 7 8 9 10
Total capacitance of input interphase capacitors [uF]
R
1
[
k
Ω
]
Applications Manual
TUNS300/500/700

3.1 Output current derating
■
The TUNS300/500/700 series should be conduction-cooled.
■
Fig.3.1, Fig.3.2 and Fig.3.3 show the derating curve in relation to the temperature of
the aluminum base plate.
Note that operation within the shaded area will cause a significant level of ripple and
ripple noise.
■
Please measure the temperature of the aluminum base plate at the center.
Please measure the temperature on the aluminum base plate edge side when you cannot
measure the temperature of the center part of the aluminum base plate.
In this case, please take 5deg temperature margin from the derating characteristics
shown in Fig.3.1, Fig.3.2 and Fig.3.3.
■
■
Attention should be paid to thermal fatigue life due to temperature fluctuations by
self-heating. Make the range of temperature fluctuations as narrow as possible if
temperature often fluctuates.
Fig.3.1
TUNS300F
Output cu ent
de ating
Fig.3.2
TUNS500F
Output cu ent
de ating
Fig.3.3
TUNS700F
Output cu ent
de ating
A-8
In the case of forced air cooling, please measure the temperature on the aluminum base plate
edge side of the leeward side. Especially in the case of small heat sink, the temperature
difference between the base plate center and the base plate edge side will increase. In this case,
the temperature margin of 5deg is not required.
Aluminum base plate temperature Tc [℃]
L
o
a
d
f
a
c
t
o
r
[
%
]
-40 -20 0 20 40 60 100
80
(75)
100
50
0
(75)
-40 -20 0 20 40 60 100
80
(75)
100
50
0
(70)
①TUNS700F12
②TUNS700F28,TUNS700F48
①
②
Aluminum base plate temperature Tc [℃]
L
o
a
d
f
a
c
t
o
r
[
%
]
Aluminum base plate temperature Tc [℃]
L
o
a
d
f
a
c
t
o
r
[
%
]
-40
-20
0
20
40
60
100
80
100
50
0
Tc
Measuring
point
Base plate
2.1 Pin configuration
3. Derating
①TUNS500F12
②TUNS500F28,TUNS500F48
①
②
Applications Manual
TUNS300/500/700

3.2 Input voltage derating
■
Fig.3.4 shows the input voltage derating curve of TUNS700F.
Fig.3.4
TUNS700F
Fig.3.5
TUNS700F12
Output cu ent
Fig.3.6
TUNS700F28/48
Output cu ent
and Input voltage
de ating
A-9
In case of both Input voltage derating and load derating are required, please multiply respective
mitigation rate (see Fig.3.5, Fig.3.6).
Input voltage
de ating
and Input voltage
de ating
L
o
a
d
f
a
c
t
o
r
[
%
]
Input Voltage [AC V]
85 100
85
100
Tc： Aluminum base plate temperature
Tc： Aluminum base plate temperature
Applications Manual
TUNS300/500/700

4.1 Output voltage adjustment
■
The output voltage is adjustable in the output voltage variable range (Table 4.1).
■
Overvoltage protection may be activated if output voltage is set up over the certain level.
■
■
About -Y1 options (48V output only)
1)
2)
3) Boost terminal (BC terminal) voltage will be changed to DC390Vtyp.
Table 4.1
4.2 Output voltage adjustment by potentiometer
■
The output voltage is adjustable by e ternal potentiometer as shown in Fig.4.1.
■
■
Fig.4.1
Table 4.2
A-10
0.15
VR[kΩ]
5 5 5 5
±20%
R1[kΩ]
3.3 12 27 27
R2[kΩ]
0.15 0.15 0.15
1
VR[kΩ]
5 5 5 5
±10%
R1[kΩ]
6.8 27 47 47
R2[kΩ]
111
2.2 2.2 2.2
VR[kΩ]
5 5 5 5
Standard Option ： -Y1
±5%
R1[kΩ]
12 39 68 68
R2[kΩ]
2.2
When the output voltage is increased, the ma imum output current must be reduced not to
e ceed the rated power. When the output voltage is reduced, the ma imum output current must
be kept within its rated current.
The potentiometer(VR) and resistor (R1, R2) might not meet requirements of fluctuation
characteristics of ambient temperature; therefore, cermet type potentiometer
( ≦ ±300ppm/ ℃ ) and metallic film resistor ( ≦ ±100ppm/ ℃ ) are recommended.
Connection devices
outside the
powe supply
Output voltage 12V 28V 48V
Output voltage
adjustment
Recommended
component values
Standard Standard
（ 115 ～ 135% ） （ 125% ～ 140% ）
Boost terminal
voltage
DC380Vtyp DC380Vtyp DC380Vtyp
DC390Vtyp
（ 80% ～ 120% ） （ 80% ～ 110% ） （ 80% ～ 120% ）
Overvoltage protection
operation value
15.0 ～ 16.8V 35.0 ～ 39.2V 55.2 ～ 64.8V 60.0 ～ 67.2V
（ 125 ～ 140% ） （ 125 ～ 140% ）
Standard Standard Standard Option ： -Y1
Output voltage
variable range
9.6 ～ 14.4V 22.4 ～ 33.6V 38.4 ～ 52.8V 38.4 ～ 57.6V
（ 80% ～ 120% ）
Variable range upper limit in the standard of 48V output is 52.8V (rated voltage + 10%). Please
use the option -Y1 if up to +20% output voltage adjustment is necessary.
On the safety standards, the output of the options -Y1 are treated with the ELV. The
manufacturer must provide protection against inadvertent contact to the operator.
Overvoltage protection operation value will be changed to the value shown in
Table 3.1.
Output voltage 12V 28V 48V
Output voltage
va iable ange
-VOUT
+VOUT
VR
5kΩ
+S
TRM
-S
R1
R2
TUNS
LOAD
2.1 Pin configuration
4. Output voltage adjustment
Applications Manual
TUNS300/500/700

■
Fig.4 .2
＜ Output voltage decreasing ＞
Fig.4 .3
＜ Output voltage increasing ＞
When variable only in one side direction of the output voltage from the rated voltage, please do
the connection shown in Fig.4.2 or Fig.4.3.
The resistance can be calculated by the following equation. In addition, because there is that it
is not a calculated value as in the variations of the internal components, it is recommended that
you adjust the potentiometer.
Output voltage
dec easing
Output voltage
inc easing
A-11
TRM
RU
+VOUT
-VOUT
RT
2.7kΩ
Shunt
regulator
Vref
+S
-S
TRM
RD
+VOUT
-VOUT
RT
2.7kΩ
Shunt
regulator
Vref
+S
-S
Ｖ
OD
： Output voltage needed to set up V]
Ｖ
OR
： Rated output voltage V]
ＲＴ ：
Resistor of TRM kΩ]
12V : 6.8 kΩ]
28V : 8.2 kΩ]
48V : 8.2 kΩ]
： Reference voltage V]
Ｖ ref = 2.495 V]
Ｖ
ref
Ｖ
OU
： Output voltage needed to set up V]
Ｖ
OR
： Rated output voltage V]
ＲＴ ：
Resistor of TRM kΩ]
12V : 6.8 kΩ]
28V : 8.2 kΩ]
48V : 8.2 kΩ]
： Reference voltage V]
Ｖ ref = 2.495 V]
Ｖ
ref
 =2.7

−

−  [  Ω]
 =


ܱܴ
−

 =


ܱܦ
−

 =2.7


− 1 
−  [  Ω]
 =


ܱܴ
−

 =


ܱܷ
−

Applications Manual
TUNS300/500/700

4.3 Output voltage adjustment by external voltage
■
■
Overvoltage protection will be activated if output voltage is adjusted over the certain level.
■
During startup , VTRM should be applied before input voltage.
■
Fig.4 .4
(1) Output voltage 12V
Vo = -1.526×V
TRM
+ 15.91
(2) Output voltage 28V
Vo = -3.367×V
TRM
+ 36.44
(3) Output voltage 48V
Vo = -6.010×V
TRM
+ 63.09
Please use low impedance for VTRM as current will flow through TRM terminal.
Output voltage
adjustment by
exte nal voltage
＜
V
TRM
→
Output voltage Calculating formula
＞
A-12
The output voltage can be adjustable by applying voltage between the TRM terminal and -S
terminal.
-VOUT
+VOUT
+S
TRM
-S
V
TRM
TUNS External
voltage source
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
0.0 1.0 2.0 3.0 4.0 5.0
O
u
t
p
u
t
v
o
l
t
a
g
e
V
o
[
V
]
VTRM [V]
Output voltage 12V
18.0
20.0
22.0
24.0
26.0
28.0
30.0
32.0
34.0
36.0
38.0
0.0 1.0 2.0 3.0 4.0 5.0
O
u
t
p
u
t
v
o
l
t
a
g
e
V
o
[
V
]
VTRM [V]
Output voltage 28V
+20% +20%
+20%
-20% -20%
-20%
+10%
Applications Manual
TUNS300/500/700

5.1 Parallel operation
■
Option:-P is for parallel operation (TUNS700F only).
■
Terminal is different from the standard. See Figure 5.2.Position is the same as standard.
■
There is no remote sensing function and the output voltage variable function.
■
■
Total number of units should be 5 pieces or less.
■
■
The length and width of output should be as same as possible to optimize the current sharing.
■
■
■
Fig.5.1
Fig.5.2
TUNS700F □□ -P
Pin Assignment
A-13
(Output current in parallel operation)
=(the rated current per unit) × (number of unit) × 0.9
Input capacitor C11, Boost voltage capacitor (Cbc, C20, C30), Inrush current protection resistor
RFR1, Output capacitor (Co) can not be shared. Please connect them to each power supply for
parallel operation. In addition, To avoid startup time difference, please use same value for Cbc
and RFR1 for each power supply.
Connect each input pin with as low impedance possible. When the number of the units in
parallel operation increases, input current increases. Adequate wiring design for input circuitry
such as circuit pattern, wiring and current for equipment is required.
If temperatures of aluminum base plates are different during among the power supplies for
parallel operation, voltage will vary significantly. balancing between module will not good.
Please consider the designing of heat dissipation to equalize the aluminum base plate
temperature.
+ M / -M terminal is the output voltage monitor terminal. Please do not take the current from +
M / -M terminal. Also, please do not connect the + M / -M each other parallel to the power
supply.
TUNS700F □□ -P
Load
cha acte istic
The output current can be balanced by static load regulation the power supply. Output voltage -
output current characteristic is shown in Fig.5.1.
As variance of output current drawn from each power supply is 10% ma imum, the total output
current must not e ceed the value determined by the following equation.
2.1 Pin configuration
. Parallel operation (option: ‐ P)
⑦-VOUT
⑧-M
①AC1
②AC2
③R ④+BC
⑨+M
⑥+VOUT
⑤-BC
⑩NC
⑪IOG
4-FG
Bottom view
Applications Manual
TUNS300/500/700

6.1 Ripple voltage of boost voltage
■
At low temperature, ripple voltage of boost voltage increases due to Cbc freezes.
■
Select a capacitor of which ripple voltage of boost voltage does not e ceed 30Vp-p
on an actual operating condition.
And check the ma imum allowable ripple current of the capacitor.
■
Fig.6.1 and Fig.6.2 shows the relationship between ripple voltage of boost voltage and
temperature(Vin=AC85V).
Fig.6.1
TUNS500F
Relationship
between
ipple voltage of
boost voltage
and tempe atu e
(Vin=AC85V)
A-14
2.1 Pin configuration
6. Operation Under Low Temperature Conditions
Applications Manual
TUNS300/500/700

Fig.6.2
TUNS700F
Relationship
between
ipple voltage of
boost voltage
and tempe atu e
(Vin=AC85V)
A-15
Applications Manual
TUNS300/500/700

7.1 Holdup time
■
Holdup time is determined by the capacitance of Cbc.
Fig.7.1
TUNS300F
Relationship
between
holdup time
and Cbc
Fig.7.2
TUNS500F
Relationship
between
holdup time
and Cbc
Fig.7.3
TUNS700F
Relationship
between
holdup time
and Cbc
Fig.7.1, Fig.7.2 and Fig.7.3 show the relationship between holdup time and output current
within the allowable capacitance of Cbc.
A-16
10
100
1000
0 20 40 60 80 100 120
Output current [%]
H
o
l
d
u
p
t
i
m
e
[
m
s
]
Cbc=390uF
Cbc=470uF
Cbc=1,560uF
Cbc=2,200uF
10
100
1000
0 20 40 60 80 100 120
Output current [%]
H
o
l
d
u
p
t
i
m
e
[
m
s
]
Cbc=390uF
Cbc=780uF
Cbc=1,560uF
Cbc=2,200uF
2.1 Pin configuration
7. Holdup Time
Applications Manual
TUNS300/500/700

8.1 Mounting method
■
Fig.8.1
Mounting method
When implementing the power supply to the printed circuit board, please fi the power
supply to the printed circuit board by screw before the soldering.
If it is screwed to the substrate after soldering, there is a possibility of failure by adding
mechanical stress to the soldering point and the internal connections of power supply.
A-17
Heat sink
Heat sink
retention screws
Silicone grease
/ Heat dissipation sheet
Power supply
Power supply
retention screws Power supply
soldering
printed circuit board
2.1 Pin configuration
8. Mounting method
①
②
Applications Manual
TUNS300/500/700