Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b 1.5Wa t t BLA05 Series
■ Overview
Our BLA series isolated-type D C-DC converters feature a small package (14x20.3x9.7mm) and
light weight (3.2g) capable of 1.5W output. As ultralow noise and extremely high efficiency are made
possible by this new circuit, it is ideal for analog circuits as well as analog and digital hybrid circuits.
■ Features
- Ultralow noise
- Adjustable Output Voltage
- ON/OFF Control
- Dual power supply usable
as single power supply
- Withstand voltage AC500V
- Built-in Over Current
Protection Circuit
- No tantalum capacitor or
electrolytic capacitor
- Covered with a metal
shield
- Surface Mount Package
- No heat sink needed
- Operating Temp Range
−40°C to +85°C
(Temperature derating
required)
- RoHS Compliant
■ Model/Rating Table 1
Models
BLA05 Series
Input V
Vdc
Output V
Vdc
Output I
mA
Line Reg.
mV(max.)
Load Reg.
mV(max.)
Ripple
Noise
mVpp(typ.)
Efficiency
%(typ.)
BLA05-05S30
3 to 9
5
0 to 300
20
40
5
80
BLA05-12S12
12(15)
0 to 125(100)
40
100
5
82
BLA05-12W06
±12(±15)
0 to 60(50)
80
600
5
82
Note 1: Output voltage in parentheses is when Vadj and –Vout are short-circuited.
Note 2: Output current in parentheses is at the maximum output voltage.
Note 3: Ripple noise and efficiency are on the basis of 5V input voltage and load rating.
Note 4: Ripple noise is measured at 20MHz bandwidth, with a multi layered cerami c c apaci t or of 10μF at
input and 0.1μF at output.
■ Specifications Table 2
Refer to Table 1
5.0V±3% , 12V ±3%, ±12V±5% (When Vadj terminal is open)
4.75 to 6.0V (5.0V model), 11.4 to 15V (12V model), ±11.4 to ±1 5V (±12V model)
Refer to Table 1 (Rated output, Input voltage varying in the range of Table 1)
Refer to Table 1 (Rated input/output, Load varying from 0 to 100%, ±output is upon balanced load)
40mV typ.(5V model), 100mV typ.(12V model), 150mV typ.( ±12V model)
(Rated input/output, for within ambient temperature range with 100% load at temperature derating)
Refer to Table 1 (Rated input/output, common temp, measurement f requency bandwidth 20MHz)
80% ~ 82% typ.
(Rated input/ output, Common temp., refer to Table 1)
Operate at 105% or above of rated load current. Auto restart type.
None
Yes
None
Between 2Pin (-Vin) and 3Pin (ON/OFF): Output is ON when open, output is OFF when short-circuited.
4mA max.
Between input and output, input and case, output and case: One minute at AC500V.
Between input and output, input and case, output and case: 50MΩ or more (at DC500V)
Approx. 50~140pF (Depend on models)
Operating tem peratures −40°C to +85°C (Refer to temp derating described separately)
Storage temperatures -40°C to +85°C
20 to 95%R.H. (Max. wet bulb t emp 35°C with no condensation)
Below 30°C/60% R.H. before mounting the converter
Natural cooli ng (instal l at a well-ventil ated place)
10~55Hz Total amplitude 1.52mmp-p (2H for each of three directions) S weep time 15min
Acceleration 100G (3 times for each of three directions, total 18 times) Impact time 6ms
3.2g typ.
W=14 L=20.3 H=9.7 typ.(mm) (For dimensional details, refer to the shape and dimensions shown
separately)
*The above specifications are provided with rated value and ambient temp. 25°C±5°C, unless otherwise specified.
*The contents provided in this datasheet may be changed at any time without prior notice.
1
DC-DC Converter BDD20150213
Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b 1.5Wa t t BLA05 Series
1. Scope
These specifications shall apply to the isolated type DC-DC converter BLA05 series.
2. Model/Rating
Model name Rated input
voltage
Rated output Shape Remarks
BLA05-05S30
DC5.0V
5.0V,300mA
SMD
BLA05-12S12
12.0V,125mA
BLA05-12W06
±12V,each 60mA
Unless otherwise mentioned in these specifications, input shall be rated input, output shall be rated
output, and ambient temperature shall be 25°C±5°C.
3. Environmental conditions
3-1 Temperat ur e r ange
In operation −40°C to +85°C (Derating required)
In storage −40°C to +85°C
3-2 Humidity range
In operation 20 to 95%R.H. (However, max. wet bulb temperature 35°C, no condensation)
In storage 20 to 95%R.H. (However, max. wet bulb temperature 35°C, no condensation)
Note) For storage before mounting, store in a place below 30°C and 60% R.H.
2
DC-DC Converter BDD20150213
Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b 1.5Wa t t BLA05 Series
4. Specifications & Standards
This product is RoHS compliant.
4-1 Input conditions and output c har act er i s t ics *1
Model name
Input
voltage*2
V
min. - max.
Output
voltage
V
Output
current
mA
min. - max.
Output volt age stabil ity *3
Output ripple
noise *4
mVp-p
typ. / max.
Efficiency*5
%
typ.
Input
mV
max.
Load
mV
max.
Temp.
mV
typ.
BLA05-05S30
3.0 to 9.0
5±3%
0 to 300
20
40
40
5/15
80
BLA05-12S12
3.0 to 9.0
12±3%
0 to 125
40
100
100
5/15
82
BLA05-12W06
3.0 to 9.0
±12±5%
0 to 60 x 2
80
600
150
5/15
82
*1 With the measurement circuit of 4-4. Unless otherwise mentioned in these specifications, input
and output shall be rated and ambient temperature shall be 25°C±5°C.
*2 Minimum input voltage varies according to the ambient temperature. Refer to 7-5.
*3 Input: For variation of input voltage = min to max.
Load: For variation of output current = 0 to rated.
Temperature: For variation of ambient temperature = -40 to Tamax.
For within ambient temperature range with 100% load at temperature derating of 4-3.
A two output product is when + output current and – output current are equal.
*4 Measured frequency bandwidth 20MHz. At both ends of external capacitor (C2, or C4,C5).
4-2 Capacitance of external capacitor
This pr oduct has a limited c apacitance f or an output e xternal capacit or. L imit the capacitance of an
external capacitor as follows: Output external capacitor
Model name
Capacitance
Plus output side
Minus output side
BLA05-05S30
0 to 100μF *1
-
BLA05-12S12
0 to 47μF *1
-
BLA05-12W06
0 to 22μF *2
0 to 22μF *3
*1 Total of C2 and C3 in the Standard Connection Circuit of 6. (1)
*2 Total of C2 and C4 in the Standard Connection Circuit of 6. (2)
*3 Total of C3 and C5 in the Standard Connection Circuit of 6. (2)
3
DC-DC Converter BDD20150213
Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b 1.5Wa t t BLA05 Series
4-3 Temperatur e der ating N atural coo lin g
4-4 Measurement circuit
Load rate (%)
Ambient temperature (°C)
-30 -20 -10 0 10 20 30 40 50 60 70 80
20
0
-40
40
60
80
100
BLA05-05S03
BLA05-12S12
BLA05-12W06
Note: at rated output
SW2
C6
R1
Coaxial cable: 50Ω, 1.5m
R1: 51Ω
C6: 0.1μF
Oscilloscope
(Measurement of
ripple noise)
7
+Vout
5
-Vout
Load
C2
1
2
-Vin
+Vin
+
Vin
BLA-S Serie s
ON/OFF
SW1
3
V
A
V
A
SW1
Short = Output OFF
Open = Output ON
C2: 0.1μF（Multi layered ceramic capacitor）
Open:Vout=5V,12V
C1
C1: 10μF（Multi layered ceramic capacitor）
7
+Vout
4
-Vout
Load
C4
1
2
-Vin
+Vin
+
Vin
BLA-W Series
ON/OFF
SW3
3
A
Vadj
SW4
V
A
SW3
Short = Output OFF
Open = Output ON
C4, C5: 0.1μF（Multi layered ceramic capacitor）
5
C5
V
A
6
Load
SW4
Short:Vout = ±15V
Open:Vout = ±12V
V
C3
C3: 10μF
（Multi layered ceramic capacitor）
Short:Vout=5V→6V
12V→15V
Vadj
SW2
6
4
DC-DC Converter BDD20150213
Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b 1.5Wa t t BLA05 Series
4-5 Additional funct ions
Item
Specifications & Standards
Conditions
Over current
protection circuit
Operate at 105% or above, auto
restart type.
Over voltage
protection circuit
None
Adjustable output
voltage range
4.75 to 6.0V(BLA05-05S30)
11.4 to 15V (BLA05-12S12)
±
11.4 to
±
15V (BLA05-12W06)
By external resistor
Refer to 7-3
ON/OFF control
Open for output ON
Low (0 to 0.3 V, 4mA max .) f or output
OFF
Refer to 7-1
4-6 Withstand voltage and Insulation r esistance
1) Withstand voltage
Between input and output, input and case, output and case: One minute at AC500V
2) Insulation resistance
Between input and output, input and case, output and case: 50MΩ or more (at DC500V)
5. Outer dimensions and description of terminals
5-1 Shape and dimensions
Bellnix
DC-DC CONVERTER
BLA05-05S30
20.3±0.5
14.0±0.59.7 max.
3.81
Side View
Bottom View
2.54×3
17.3
1.5±0.1
1.8±0.2
CL
CL
Top View
会社ロゴ
製品型名
Lot No.
1ピンマーク
0.25 min.
1
2
3 4
5
6
7
3.81
Pin
Function
BLA-S
BLA-W
1
+Vin
+Vin
2
-Vin
-Vin
3
ON/OFF
ON/OFF
4
NC
-Vout
5
-Vout
Com
6
Vadj
Vadj
7
+Vout
+Vout
Materials of termin als a nd case
Terminal pin ---------- Material: Copper
Plating: Gold plating after
nickel plating
Case ----------- Material: Nickel silver
- Unit: mm
- Dimensional tolerance (unless specified):±0.3
- Weight: 3.2g typ.
- Tolerance on terminals 0.2 mm max . (Max. lifting
of the terminal part when placed on a plane)
1 Pin mark
Company logo
Model name
5
DC-DC Converter BDD20150213
Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b 1.5Wa t t BLA05 Series
5-2 Recommended footprint dimensions
2.6
2.54×3
17.3
3.81 3.81
1.9
3
2
17
6
5
4
CL
CL
Note) Recommended dimensions are shown above. Use your design standard for your specific design.
5-3 Lot ind ication
1
1Ｄ２
製造管理密番（無表示の場合もあり。)
製造月（1～9月=1～9、10月=O、11月=N、12月=D)
製造年（西暦末尾1桁）
(2011年 1月製造)
(2011年12月製造)
1
6. Standard connection circuit
(1) BLA-S series
+Vin Load
SW1
Open = Output ON
Short = Output OFF C1: 4.7μF
SW2
Vout = 5V→6V
Short:
Open:= 5V, 12VVout
C2: 4.7μF
C3: 0.47μF
= 12V→15V
1
2
36
5
7
+Vin
-Vin
ON/OFF
SW1
+Vin
SW2
-Vout
+Vout
BLA-S
Series
Fuse
C1C2 C3
(2) BLA-W series
1
2
36
5
7
ON/OFF
SW1
C5
C3
Load
SW2
-Vout
Vadj
+Vout
BLA-W
Series
SW1
Open = Output ON
Short = Output OFF
C2C4
Load
Common
4
C1:
SW2
Short:Vout = ±12V→±15V
Open:Vout = ±12V
C2, C3:
C4, C5: 4.7μF
0.47μF
4.7μF
+Vin
-Vin
+Vin C1
Fuse
Note) This product has no built-in fuse. Always connect a fuse to the +Vin line. Allow enough
capacity in the power supply for a fuse to blow.
(Manufactured in January 2011)
(Manufactured in December 2011)
Production c ode for manufacturing control (m ay not be indicated)
Manufacturing month (Jan to Sep = 1 to 9, Oct = O, Nov = N, Dec = D)
Manufacturing year (the last digit of A.D.)
6
DC-DC Converter BDD20150213
Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b 1.5Wa t t BLA05 Series
7. Various func tions
7-1 ON/OFF control
The ON/OFF control function enables users to control ON/OFF of the output voltage without
inputting or cutting it off.
Between –Vin terminal (No. 2 pin) and ON/OFF terminal (No. 3 pin)
Open (2V max.) : Output ON
Short (0 to 0.3V 4mA max.): Output OFF
or
1
ON/OFF
-Vin
+Vin
2
3
7-2 Out put over current protec t ion
If output cur rent has beco me an over curr ent status, output voltage is lo wered and the over c urrent
protection circuit is activated. (Over current protection circuit actuating current: 105% or above of the
rated load current.)
The converter automatically returns to normal operation as soon as the over current status is
resolved. Holding of the over current status for over 30 seconds may result in damage, so resolve
the over current status within 30 seconds.
Also, if the converter does not return to normal operation automatically even if the over current status
has been resolved, turn off the power once or turn the output OFF with an ON/OFF control and
reactivate.
Characteristics in the over current mode
Output Current[%]
Output Voltage[%]
100
100
0
050
50
Note) A dro oping c har acteri stic m a y be see n
in the over current protection
characteristics as shown on the left. Note
that out put v oltage m a y not com e up upo n
the activation if connected to a nonlinear
load such as a lamp, motor, etc., or a
constant current load.
7
DC-DC Converter BDD20150213
Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b 1.5Wa t t BLA05 Series
7-3 Out put voltage adjustm ent
7-3-1 Short circuit Vadj and –Vout terminal
Output vo ltag e can be set in m aximum as per the following table b y s hort-circuiting Vadj a nd –Vout
terminals. In case of no variable output voltage, open the terminal.
Output voltage for the connection of Vadj terminal
Model name Open
Short-circuit
with -Vout
BLA05-05S30
5.0V
6.0V
BLA05-12S12
12.0V
15.0V
BLA05-12W06
±12.0V
±15.0V
7-3-2 Resistor adjustment control
You can also adjust output voltage by inserting a resistor between Vadj terminal and +Vout terminal
or –Vout terminal.
To decrease the vo ltage To increase the voltage
7+Vout
6Vadj
5 or 4 -Vout
Rb
Load
※1
7+Vout
6Vadj
-Vout
Ra
Load
5 or 4
※1
*1 -Vout pin: BLA-S is 5pin, BLA-W is 4pin
Model name
To decrease the vo ltage
Output voltage: Vo[V], Connecting
resistor Rb[kΩ]
To increase the voltage
Output voltage: Vo[V], Connecting
resistor Rb[kΩ]
BLA05-05S30
Vo = (2490 Rb + 7221) / (500 Rb +
1700)
Rb = (7221 − 1700 Vo) / (500 Vo −
2490)
Variable range: Vo=4.75 V min.
Vo = (2490 Ra + 7221) / (500 Ra +
1200)
Ra = (7221 − 1200 Vo) / (500 Vo −
2490)
Variable range: Vo=6.0V max.
BLA05-12S12
Vo = (2996 R b + 17643) / ( 250 Rb +
2605)
Rb = ( 17643 − 2605 Vo ) / (250 Vo −
2996)
Variable range: Vo=11.4V m in.
Vo = (2996 Ra + 17643) / (250 Ra +
1175)
Ra = (17643 − 1175 Vo) / (250 Vo −
2996)
Variable range：Vo=15.0V max
BLA05-12W06
Vo = (10607 Rb + 67006) / (440 Rb +
12012)
Rb = (67006 − 12012 Vo) / (440 Vo −
10607)
Variable range: Vo=±11.4V min.
Vo = (2652 Ra + 26977) / (110 Ra +
902)
Ra = (26977 − 902 Vo) / (110 Vo −
2652)
Variable range：Vo=±15.0V max.
Note) If output voltage is made variable, use at the maximum power (1.5W) or less.
If output voltage is made lower, do not connect RB with resistor which less than Vo min setting
resistor value.
8
DC-DC Converter BDD20150213
Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b 1.5Wa t t BLA05 Series
7-4 Activ at io n and deactivatio n voltage
The activation voltage and deactivation voltage of this product varies according to the ambient
temperature. Refer to the following table.
Ambient temperature
Range of activation and
deactiva tio n voltage
-40 to 0°C
2.2 to 3.15V
0 to 85
1.5 to 2.9V
7-5 Min i mu m input voltage
The minimum input voltage of this product varies according to the ambient temperature. Refer to the
following table.
Ambient temperature
Minimum input voltage
-40 to 0°C
3.2V
0 to 85°C
3.0V
8. Protecti on against reverse connection of input pow er supply ( example)
This product will be damaged if erroneously connected with reverse input polarity. To cope with p ossible
reverse connection, add a protection circuit as shown in the following figure.
The following is an example using a fuse and a diode.
1
25
7
+Vin
-Vin
+Vin Load
-Vout
+Vout
BLA-S
Series
Fuse
C1 C2 C3
D1
9. Common mode no ise reduction method ( example)
To reduce common mode noise of this product, connect a capacitor of 1000pF or so (C4) between
primary and secondary terminals as follows. In this case, note that using a capacitor of too much
capacitance may result in the increase of coupling capacitance between primary and secondary
terminals.
1
25
7
+Vin
-Vin
+Vin Load
-Vout
+Vout
BLA-S
Series
Fuse
C1 C2 C3
D1
C4
9
DC-DC Converter BDD20150213
Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b 1.5Wa t t BLA05 Series
10. Input noise reduction met hod (example)
Input noise from converter can reduce by designing Pi filter on input side.
11. Serial oper at ion method (example)
Serial operation is possible by wiring this product as per the following figure. Limit the output current to
not excee d th e s maller rate d c ur rent of t h e po wer sup plies co nnec te d i n ser i es in or der to av oi d more
current than rating to run into the power supply.
BLA-S
Series
1
25
7
+Vin
-Vin
+Vin
-Vout
+Vout
BLA-S
Series
1
25
7
+Vin
-Vin
-Vout
+Vout
Fuse
Fuse
D1
D2
Load
D1,D2:順電圧の低いショットキーバリアダイオードを推奨
Note) This product is not suitable for parall el opera tio n.
Schottky diodes of low forward voltage are recommended for D1 and D2
1
25
7
+Vin
-Vin
+Vin
BLA-S
Series
Fuse
C2
C1
L1
10
DC-DC Converter BDD20150213
Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b 1.5Wa t t BLA05 Series
12. Solder ing conditions
Observe th e follo wing cond itions for s oldering tem per ature and t im e. Flow m ounting is not p ossibl e for
this product.
Reflow method
Reflow temperature profile
In the case of Sn-3Ag-0.5Cu series solder
AA' B' C
B
半田付け時間(s)
部品表面温度(℃)
Ty1
Ty2
TP
225
C
B'
B
1.0 ~ 5.0℃/s
Ty1 ~ Ty2:
1.0 ~ 4.0℃/s
225℃以上:
TP:
Ty2:
Ty1:
1.0 ~ 3.0℃/s
40 ~ 100s
170±10℃
150±10℃
245℃max.
20 ~ 40s
A
A'
Refrain from causing a vibration of the product during the reflow.
The number of reflows shall be once (no mounting of the reverse side).
* Eutectic solder may be used so far as within the above profile conditions.
13. Vibratio n and impact tests
Vibration: 10~55Hz Total amplitude 1.52mmp-p (2H for each of three directions)
Sweep time 15min
Impact: Acceleration 100G (3 times for each of three directions, total 18 times)
Impact time 6ms
14. Cleaning
This product is not for immersible cleaning. Use of no-clean flux is recommended.
Soldering time (s)
Parts surface temperature (° C)
or higher
11
DC-DC Converter BDD20150213
Ultralow Noise, Ultracompact, Isolated type DC-DC Converter
b 1.5Wa t t BLA05 Series
15. Precautions for use
To ensure user’s safety, check specifications before using the product and always observe the
following precautions for use.
This product is intended for use in general electronics equipment (office equipment,
communication equipment, measurement equipment). Do not use the product for medical
equipment, nuclear equipment, trains, etc., whereby human life or property may be directly
affected by damaged product. Consult with us for any use other than for such general
electronics equipment.
Minor changes and component parts changes that do not affect contents of the specifications
will be made due to characteristic improvement of the product a nd other reasons without prior
notice.
This product is not suitable for parallel operation.
Do not use connec tors and sock ets for mountin g the p roduct. C ontact resistance m ay have an
adverse effect on the performance. Use the soldering method for mounting on the printed circuit
board.
This equipment has a built-in over current protection c ircuit but avoid a prolonged short circuit
which may lead to failure.
This product may be damaged if used under nonstandard electrical conditions o r nonstandard
environmental conditions including temperature. Ensure use within the standards.
Avoid using this product in a place that generates corrosive gas or is dusty.
This product may be damaged by static electricity. Make sure that the workplace is guarded
against static buildup and static electricity on operators by use of proper grounding.
A fuse mechanism is not built in this product. Connect a fuse to the + input lin e to guard agains t
excessive input current under abnormal circumstances. Allow enough capacity in the power
supply for a fuse to blow.
This product has no built-in function for over voltage protection.
This product does not come with a test report.
16. Warranty
The warranty term of the product is one year after shipment. Should the product become defective
within the warranty period due to our design or workmanship, the product will be repaired free of charge
or replaced. However, this warranty does not cover products which have been subjected to
unauthorized inner modifications, etc.
The scope of our warranty is limited to that of the said product.
17. Contact
If you have any further technical questions for this product, please contact us.
E-mail: info@bellnix.com
URL: http://www.bellnix.com
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DC-DC Converter BDD20150213