Ultra Low Noise, Ultra Compact, Isolated type DC-DC Converter
6Watt BLC05 Series
b
■ Overview
The BLC series isolated-type DC-DC converters feature a small package
(23.2x21.1x9.7mm) and light weight (5.4g) capable of 6W output.
As ultralow noise and extremely high efficiency are made possible by a new circuit,
it is ideal for an analog circuit as well as an analog and digital hybrid circuit.
■Model/Rating
■ Features
- Ultra low noise
- Adjustable Output Voltage
- ON/OFF Control
- Dual power supply usable
as single power supply
- Withstand voltage AC500V
- Over Current Protection Circuit
- No tantalum capacitor or
electrolytic capacitor used
- 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
Table 1
Models
BLC Series
Input V
Vdc
BLC05-05S100
Output V
Vdc
Output I
mA
5
0 to 1000
Ripple
Line Reg. Load Reg.
Efficiency
Noise
mV(max.) mV(max.)
%(typ.)
mVpp(typ.)
20
40
8
77
4.5 to 9
BLC05-12S50
12(15)
0 to 500(400)
40
100
8
80
BLC05-12W25
±12(±15)
0 to 250(200)
80
600
8
80
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 at 5V input voltage and load rating.
Note 4: Ripple noise is measured at 20MHz bandwidth, with a multi layered ceramic capacitor with
10μF at input and 0.47μF at output
■ Specifications
Input voltage range
Table 2
Refer to Table 1
Rated output voltage
5.0V±3%, 12V±3% , ±12V±5% (When Vadj terminal is open)
Adjustable output voltage range
4.75 to 6.0V (5.0V model), 11.4 to 15V (12V model), ±11.4 to ±15V (±12V model)
Line regulation
Refer to Table 1 (Rated output, Input voltage varying in the range of Table 1)
Load regulation
Refer to Table 1 (Rated input/output, Load varying from 0 to 100%, ±output loaded evenly)
Temperature regulation
40mV typ.(5.0V model), 100mV typ. (12V model), 150mV typ. (±12V model)
(Rated input/output, for within ambient temperature range with 100% load at temperature derating)
Ripple noise
Refer to Table 1 (Rated input/output, common temp, measurement frequency bandwidth 20MHz)
Efficiency
77% to 80% typ. (Rated input/output, Common temp., Refer to Table 1)
Over current protection
Operate at 105% or above of rated load current. Auto restart type.
Over voltage protection
None
Under Voltage Lock Out
Yes
Input over current protection
None
Remote ON/OFF control
Between 2Pin (-Vin) and 3Pin (ON/OFF): Output is ON when open, output is OFF when short.
Standby current
4mA max.
Withstand voltage
Between input and output, input and case, output and case: AC500V/per minute.
Insulation resistance
Between input and output, input and case, output and case: 50MΩ or more (at DC500V)
Capacitance between P and S
Approx. 40 to 90pF (depending on the model)
Operating temp range
Operating temperatures −40°C to +85°C (Refer to temp derating in the datasheet)
Storage temp range
Storage temperatures -40°C to +85°C
Humidity range
20 to 95%R.H. (Max. wet bulb temp 35°C with no condensation)
Storage conditions
Below 30°C/60% R.H. before mounting the converter
Cooling conditions
Natural cooling (install in a well-ventilated place)
Vibration
10 to 55Hz Total amplitude 1.52mmp-p (2H for each of three directions) Sweep time 15 min
Impact
Acceleration 100G (3 times for each of three directions, total 18 times) Duration 6ms
Weight
5.4g typ.
Outer dimensions
W=23.2 L=21.1 H=9.7 typ.(mm)(For dimensional details, refer to the shape and dimensions in the
datasheet)
＊The above specifications are provided with rated input/output and ambient temperature 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
BDD20170524_A01
Ultra Low Noise, Ultra Compact, Isolated type DC-DC Converter
6Watt BLC05 Series
b
1. Scope
These specifications shall apply to DC input, isolated type DC-DC converter BLC05 series.
2. Model/Rating
Model name
Rated input
voltage
Rated output
Shape
Remarks
BLC05-05S100
BLC05-12S50
BLC05-12W25
5.0V, 1000mA
12.0V, 500mA
DC5.0V
SMD
±12V, each
250mA
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 Temperature range
In operation
In storage
3-2 Humidity range
In operation
In storage
−40°C to +85°C (Derating required)
−40°C to +85°C
20 to 95%R.H. (However, max. wet bulb temperature 35°C, no condensation)
20 to 95%R.H. (However, max. wet bulb temperature 35°C, no condensation)
Note) Store in a place below 30°C and 60% R.H. before mounting.
2
DC-DC Converter
BDD20170524_A01
Ultra Low Noise, Ultra Compact, Isolated type DC-DC Converter
6Watt BLC05 Series
b
4. Specifications & Standards
This product complies with RoHS Directive and Bellnix Environmental Management Regulations.
4-1 Input conditions and output characteristics
*1
Output voltage stability*2
Output ripple
noise *3
Temp.
mVp-p
mV typ.
typ. / max.
Input
voltage
V
Output
voltage
V
Output
current
mA
Input
mV max.
Load
mV max.
BLC05-05S100
4.5 to 9.0
5±3%
0 to 1000
20
40
40
BLC05-12S50
4.5 to 9.0
12±3%
0 to 500
40
100
BLC05-12W25
4.5 to 9.0
±12±5% 0 to 250×2
80
600
Model name
Efficiency
%
typ.
77
100
8/ 20
8/ 20
150
8/ 20
80
80
*1 With the measurement circuit of 4-4. Unless otherwise mentioned, input and output values are rated and ambient
temperature shall be 25°C±5°C.
*2 Input: Input voltage varying from min. to max.
Load: Output current varying from 0 to rated.
Temperature: Ambient temperatures varying from -40 to Tamax.
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.
*3 Frequency bandwidth 20MHz measured at both ends of external capacitor (C2, or C4, C5).
4-2 Capacitance of external capacitor
This product has a limited capacitance for external output capacitors. Limit a capacitance of the external
capacitor as follows:
Model name
BLC05-05S100
BLC05-12S50
BLC05-12W25
External output capacitor
Capacitance
Plus output side
Minus output side
*1
0 to 220μF
—
*1
0 to 100μF
—
*2
*3
0 to 100μF
0 to 100μF
*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
BDD20170524_A01
Ultra Low Noise, Ultra Compact, Isolated type DC-DC Converter
6Watt BLC05 Series
b
4-3 Temperature derating
自然空冷
Natural
cooling
100
80
負荷率（％）
Load rate (%)
60
40
20
0
-40
-30
-20
-10
0
10
20
40
30
60
50
70
80
Ambient
temperature (°C)
周囲温度（℃）
Note) at rated output
4-4 Measurement circuit
1 +Vin
+Vin
C1
+Vout 7
V
V
-Vout
BLC-S Series
6
A
2
NC
3
ON/OFF
5
Vadj
SW2
A
V
V
Common
BLC-W Series
6
A
2
V
-Vin
SW1
-Vout
3
ON/OFF
Vadj
+Vout
-Vout
Coaxial cable
同軸ケーブル:50Ω
1.5m
Rx:51Ω
Cx:0.1μF
SW1
Output ON
Open:出力=ON
Load Shrt:出力=OFF
Output OFF
SW2
Open:Vout=5V
Shrt:Vout=5V→6V
(Multi-layered ceramic capacitor)
C1=10μF(積層セラミック)
(Multi-layered ceramic capacitor)
C2=0.47μF(積層セラミック）
4
+Vout 7
1 +Vin
C3
A
-Vin
SW1
+Vin
C2
5
C4
Load
C5
Load
A
SW1
Output ON
Open:出力=ON
Output OFF
Shrt:出力=OFF
SW2
Open:Vout=±12V
Shrt:Vout=±12V→±15V
(Multi-layered ceramic capacitor)
C3=10μF(積層セラミック)
(Multi-layered ceramic capacitor)
C4,C5=0.47μF（積層セラミック）
4 SW2
OSC
Cx
Rx
オシロスコープ
Oscilloscope
(Measurement
（リップル･
of ripple noise)
ノイズの測定）
GND
4
DC-DC Converter
BDD20170524_A01
Ultra Low Noise, Ultra Compact, Isolated type DC-DC Converter
6Watt BLC05 Series
b
4-5 Additional functions
Item
Over current
protection circuit
Over voltage
protection circuit
Adjustable output
voltage range
ON/OFF control
Specifications & Standards
Operate at 105% or above,
auto restart type.
None
Conditions
4.75 to 6.0V
(BLC05-05S100)
11.4 to 15V
(BLC05-12S50)
±11.4 to ±15V (BLC05-12W25)
Output is ON when OPEN
Low (0 to 0.5V, 4mA max.) for output OFF
By external resistor
Refer to 7-3
Refer to 7-1
4-6 Withstand voltage and Insulation resistance
1) Withstand voltage
Between input and output, input and case, output and case: AC500V/per min
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
21.1±0.5
1 Pin mark
1ピンマーク
23.2±0.5
Bdllmiw
Company logo
会社ロゴ
1
ISOLATED
DC-DC CONVERTER
33
BLC-W
+Vin
-Vin
-Vin
製品型名
Model name
3
ON/OFF
ON/OFF
Lot No.
4
Vadj
Vadj
5
NC
-Vout
6
-Vout
Common
7
+Vout
+Vout
Top View
0.25 min.
10 max.
Function
BLC-S
+Vin
2
BLC05-05S100
Side View
5.08
3
4
5.08
2
5
5.08
6
5.08
1.8±0.2 CL
10.16
CL
1.5±0.1
Pin
Materials of terminals and case
Terminal pin------ Material: Copper
Plating: Nickel plating followed by
Gold plating
Case
------ Material: Nickel silver
- Unit: mm
- Dimensional tolerance (unless specified):±0.3
- Weight: 5.4g typ.
- Tolerance on terminals 0.2 mm max. (Max. lifting
of the terminal part when placed on a plane)
7
1
20.1
Bottom View
5
DC-DC Converter
BDD20170524_A01
Ultra Low Noise, Ultra Compact, Isolated type DC-DC Converter
6Watt BLC05 Series
b
2.1
5-2 Recommended footprint dimensions
2.6
CL
7
5.08
CL
5.08
6
5
3
4
5.08
2
5.08
10.16
1
20.1
Note) Recommended dimensions are shown above. Use your design standard for your specific design.
5-3 Lot indication
3 1
(Manufactured
in January 2013)
(2013年
1月製造)
(Manufactured in December 2013)
3 Ｄ ２ (2013年12月製造)
製造管理密番（無表示の場合もあり。)
Production code for manufacturing control (may not be indicated)
製造月（1～9月=1～9、10月=O、11月=N、12月=D)
Manufacturing month (Jan to Sep = 1 to 9, Oct = O, Nov = N, Dec = D)
製造年（西暦末尾1桁）
Manufacturing year (the last digit of A.D.)
6. Standard connection circuit
6-1 BLC-S series
C2
+Vin
SW1
Output ON
Open:出力=ON
Output OFF
Short:出力=OFF
Load SW2
Open:Vout=5V,12V
Short:Vout=5V→6V
=12V→15V
C1=22μF
C2=22μF
C3=0.47μF
+Vout 7
1 +Vin
C3
C1
-Vout 6
BLC-S Series
2
-Vin
NC
SW1
3
ON/OFF
Vadj
5
SW2
4
6-2 BLC-W series
1 +Vin
+Vin
+Vout 7
C2
C4
C3
C5
C1
Common
BLC-W Series
6
2
-Vin
-Vout
SW1
3
ON/OFF
Vadj
5
4
Load
Load
SW1
Output ON
Open:出力=ON
Output OFF
Short:出力=OFF
SW2
Open:Vout=±12V
Short:Vout=±12V→±15V
C1=22μF
C2,C3=22μF
C4,C5=0.47μF
SW2
6
DC-DC Converter
BDD20170524_A01
Ultra Low Noise, Ultra Compact, Isolated type DC-DC Converter
6Watt BLC05 Series
b
7. Various functions
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 (6V max.)
: Output ON
Short (0 to 0.5V, 4mA max.)
: Output OFF
+Vin
ON/OFF
1
3
or
-Vin
2
7-2 Output over current protection
If output current has reached over current status, the over current protection circuit is activated lowering
the output voltage. (Activating point: 105% or above of the rated load current)
The converter should automatically return to normal operation as soon as the over current status is
resolved, if this does not occur, turn off the power or turn the output OFF with an ON/OFF control and
then reactivate.
Holding of over current status for over 30 seconds may result in damage, so resolve over current status
within 30 seconds.
7-3.
Output Voltage[%]
Characteristics in the over current mode
100
Note) A drooping characteristic may be seen in
the over current protection state as shown on
the left figure. Note that output voltage may not
go up if connected to a nonlinear load such as a
lamp, motor, etc., or a constant current load.
50
0
0
100
Output Current[%]
7
DC-DC Converter
BDD20170524_A01
Ultra Low Noise, Ultra Compact, Isolated type DC-DC Converter
6Watt BLC05 Series
b
Adjustable Output voltage
7-3-1 Short circuiting Vadj and –Vout terminals
Output voltage can be set at the maximum as per the following table by short-circuiting Vadj and –Vout
terminals. In case of no variable output voltage, open the terminal.
Output voltage for the connection of Vadj terminal
Between Vadj and –Vout terminals
Model name
Open
Short
BLC05-05S100
5.0V
6.0V
BLC05-12S50
12.0V
15.0V
BLC05-12W25
±12.0V
±15.0V
7-3-2 Resistor adjustment control
The output voltage is adjustable by inserting a resistor between Vadj terminal and +Vout terminal or –Vout
terminal
To decrease the output voltage
7
+Vout
7
+Vout
BLC-S
4
7
Rb
Rb
Vadj
Load
Vo
BLC-W
To increase the output voltage
+Vout
4
6 Com
5
-Vout
+Vout
Load
Vadj
Load
Vo
BLC-S
4
Load
Vadj
Vo
BLC-W
6
4
Ra
Load
6
7
-Vout
6
-Vout
5
Com
Vo
Vadj
Ra
Load
-Vout
To increase the output voltage
Model name
To decrease the output voltage
Output voltage: Vo[V], Connecting
resistor: Rb[kΩ]
Output voltage: Vo[V]，Connecting
resistor: Ra[kΩ]
BLC05-05S10
0
Vo=(49.94Rb+1448.94)/(340.56+10Rb)
Rb=(340.56Vo-1448.94)/(49.94-10Vo)
Variable range: Vo=4.75V min.
Vo=(1448.94+49.94Ra)/(10Ra+240)
Ra=(1448.94-240Vo)/(10Vo-49.94)
Variable range: Vo=6.0V max.
BLC05-12S50
Vo=(17.98Rb+105.86)/(15.63+1.5Rb)
Rb=(15.63Vo-105.86)/(17.98-1.5Vo)
Variable range: Vo=11.4V min.
Vo=(105.86+17.98Ra)/(1.5Ra+7.05)
Ra=(105.86-7.05Vo)/(1.5Vo-17.98)
Variable range: Vo=15.0V max.
Vo=(53.04Rb+539.53)/(60.06+2.2Rb)
BLC05-12W25 Rb=(60.06Vo-539.53)/(53.04-2.2Vo)
Variable range: Vo=22.8V min. (±11.4V min.)
Vo=(539.53+53.04Ra)/(2.2Ra+18.04)
Ra=(539.53-18.04Vo)/(2.2Vo-53.04)
Variable range: Vo=30.0V max. (±15.0V max.)
Note) If output voltage is made variable, use at the maximum power or less.
If output voltage is made lower, do not connect Rb to resistor which is less than Vo min. setting resistor
value.
8
DC-DC Converter
BDD20170524_A01
Ultra Low Noise, Ultra Compact, Isolated type DC-DC Converter
6Watt BLC05 Series
b
7-4 Activation and deactivation voltage
This product has an under voltage lock out function to prevent malfunction when there is low input voltage.
The activation voltage and deactivation voltage is within the range shown in the table below.
Range of activation and
2.8 to 4.4V
deactivation voltage
7-5 Input circuit protection function
This input circuit has a built-in fuse to protect the secondary circuit against over current that runs for any
reason.
Rated current and fusing current of the built-in fuse are as shown in the following table. Power supply should
have more current capacity than the following fusing current to ensure a fuse blowout in an emergency.
Rated current
5.0A
Fusing current
10A or more
8. Protection against reverse connection of input power supply (example)
This product may be damaged if erroneously connected with reverse input polarity. To cope with a possible
reverse connection, add a protection circuit as shown in the following figure.
The following is an example using a fuse and a diode.
Fuse
+Vin
D1
+Vin
1
7
BLC-S
Series
C1
-Vin
+Vout
C2
2
6
C3
Load
-Vout
9. Common mode noise reduction method (example)
To reduce common mode noise of this product, connect a capacitor of 1000pF or so (C4) between the primary
and secondary terminals as shown in the following figure. 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.
Also, select a capacitor in consideration of required withstand voltage. (Noise on the primary side may run
through to the secondary side through C4 according to conditions, so check in actual use conditions.)
Fuse
+Vin
D1
+Vin
7
1
BLC-S
Series
C1
-Vin
2
+Vout
C2
6
C3
Load
-Vout
C4
10. Input feedback noise reduction method (example)
Input feedback noise from the convertor can be reduced by designing a Pi filter at input side as shown in the
following figure. Add as needed.
L1
+Vin
+Vin
C1
1
7
BLC-S
Series
C2
-Vin
2
6
9
DC-DC Converter
BDD20170524_A01
Ultra Low Noise, Ultra Compact, Isolated type DC-DC Converter
6Watt BLC05 Series
b
11. Serial operation method (example)
Serial operation is possible by wiring this product as per the following figure. Limit the output current not to
exceed the smaller rated current of the power supplies connected in series to avoid more current than rating
to run into the power supply.
+Vin
1
7
+Vout
BLC-S
Series
+Vin
-Vin
2
D1
6
-Vout
Load
+Vin
1
7
+Vout
BLC-S
Series
-Vin
2
D2
6
-Vout
Note) This product is not suitable for parallel operation.
Schottky diodes of low forward voltage are recommended for D1 and D2.
12. Soldering conditions
Observe the following conditions for soldering temperature and time. Flow mounting is not possible for this
product.
Reflow method
Reflow temperature profile
In the case of Sn-3Ag-0.5Cu series solder
部品表面温度(℃)
Parts surface temperature (°C)
A 1.0 ~ 3.0℃/s
A' Ty1:
Ty2:
Ty1 ~ Ty2:
B 1.0 ~ 4.0℃/s
B' TP:
and over
225℃以上:
C 1.0 ~ 5.0℃/s
TP
225
Ty2
Ty1
A
A'
B
B'
150±10℃
170±10℃
40 ~ 100s
245℃max.
20 ~ 40s
C
Soldering
time (s)
半田付け時間(s)
Refrain from causing 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 condition.
10
DC-DC Converter
BDD20170524_A01
Ultra Low Noise, Ultra Compact, Isolated type DC-DC Converter
6Watt BLC05 Series
b
13. Vibration and impact tests
Vibration
10 to 55Hz
Impact
Acceleration
Impact time 6ms
Total amplitude 1.52mmp-p (2H for each of three directions)
Sweep time 15 minutes
100G (3 times for each of 3 directions, total 18 times)
14. Cleaning
This product is not made for immersible cleaning. Use of no-clean flux is recommended
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 and other reasons without prior notice.
• This product is not suitable for parallel operation.
• Do not use connectors and sockets for mounting the product. Contact resistance may 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 circuit but avoid a prolonged short circuit which
may lead to failure.
• This product may be damaged if used under nonstandard electrical conditions or 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.
• 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
11
DC-DC Converter
BDD20170524_A01
工商网监
湘ICP备2023018690号
