BIAS 2 Watt Power Supply
BPW 2 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPW 2-08-00, -08-33, -08-50
BPW 2-14-00, -14-33, -14-50
The BPW Power Supply Module is an ideal solution for numerous
control applications in lighting, sensing, smart building and power
distribution where operation from 277VAC mains is required. This
low-cost supply provides up to two watts of output power at 8 or 14
VDC (Vo) and an optional 3.3 or 5 VDC (Vr) output for logic functions
such as a microprocessor, logic, timing circuits, transceivers or sen-
sors. A patented design incorporating a custom integrated circuit into
a small package (0.87 in
3
[14.3 cm
3
]) the BIAS Module provides an
immediate “drop-in” solution, requiring no additional external com-
ponents.
Actual Size
Features
•
•
•
•
•
•
•
•
Universal Input (90-308 VAC, 50/60Hz)
Small Size—0.87in
3
[14.3cm
3
]
Low no-load input power <30mW
Constant power mode, not current limit
3000 VAC Isolation
Up to 75% efficiency
EN 55022, Class B; FCC Part 15, Class B
Meets UL/CSA and EN Product Safety (ITE)
Operating Specifications
(@120VAC / 60 Hz / 25°C unless otherwise specified)
Bias Power AC/DC power supplies are designed to be
applied in two major categories of applications…
Auxiliary,
where the Bias supply is one of two or more sup-
plies and provides power for standby, housekeeping, bias-
ing or other requirements. Generally, these supply 3.3V or
5.0V requirements from the Vr output. In some cases a
small amount of Vo power is used.
Second
is as a main or utility supply where Bias is the only
supply and provides all power necessary for the product or
system. Both Vr and Vo supplies are often utilized for opti-
mum system performance.
The characteristics of the Vo and Vr outputs are different
and each has application-specific benefits which can pro-
vide high value to the system designer.
Vo is a voltage-regulated output which has a constant
power mode instead of a conventional current limit. This
output is best suited to drive mechanical relays, solenoids,
SSRs, capacitive loads, indicating lights, LEDs and as a
source for isolated DC utility power which may be used
directly or post-regulated with either a linear regulator or a
DC/DC converter. Vo is self protecting, cannot be over-
loaded and can be shorted indefinitely. The graceful transi-
tion from voltage regulation to constant power along with
the wide range of product ratings, allows the designer to
select a supply tightly matched to the design load. There is
no need to oversize a Bias Power supply. Unlike design-
your-own, or partially complete modules where significant
design margin is required, to stay far away from current
limit, Bias’s constant power alternative requires no such
over-spec’ing.
Vr is also a voltage-regulated output and is thermally pro-
tected from overload. It has very low output ripple capable
of driving microprocessors , logic, sensors, transceivers and
other elements which require a low-noise, tightly-regulated
supply. In addition, Vr is supplied internally by Vo. This
means that any capacitance added to Vo can increase the
hold-up time of Vr as well.
*Note: maximum currents specified for constant voltage
range only. See V-I curve on page 2 for Vo in constant
power range.
Electrical
Input Voltage Range
Input Surge Withstand
Output Power (Pmax)
Efficiency
Output Vo (Peak)
Line / Load Regulation Vo (Peak)
Temperature Regulation Vo (Peak)
Ripple Vo (@120 Hz)
(@ 100 kHz)
Output Vr, 3.3 volt (+/- 5%)
Output Vr, 5.0 volt (+/- 5%)
No-load Consumption
Isolation
Earth Leakage @ 120 VAC
Short Circuit Protection
Reliability @ 25° C, MIL HDBK-217F
Thermal
Operating Temperature
Operating Relative Humidity
Storage Temperature
Mechanical
Package Size
(L x W x H)
Safety
Safety Compliance
EMI Emissions
UL / EN 60950-1 2nd Ed. (CB Report Available)
EN 55022, Class B, FCC Part 15, Class B
1.35 x 1.12 x 0.58 inches
[34.214 x 28.372 x 14.757 mm]
-30 to +70° C
0 – 95%, non-condensing
-40 to +105° C
90-308 VAC (50/60Hz)
345V, < 30 sec
2.0 W min. (60Hz)
1.67 W min. (50Hz)
70% nom.
8 or 14 VDC nom. +/- 5%
+/- 1% Po < Pmax
+/- 2% Po < Pmax
1.00 V p:p
0.25 V p:p
For Vo = 8V, Ir out 160mA max, Io+Ir ≤ 250mA*
For Vo = 14V, Ir out 70mA max, Io+Ir ≤ 143mA*
For Vo = 8V, Ir out 250mA max, Io+Ir ≤ 250mA*
For Vo = 14V, Ir out 83mA max, Io+Ir ≤ 143mA*
30 mW typical @ Vin=120 VAC
3000 VAC (meets UL / CSA & EN Product Safety)
< 10 uA
Continuous, Pin ≤ 0.6 w @ Vin = 120 VAC
> 500 Khr MTBF
BIAS Power
BPW 2 Series Data Sheet, Page
1 of 5
Revised 01/26/2011
Specifications subject to change
www.biaspower.com
BIAS 2 Watt Power Supply
BPW 2 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPW 2-08-00, -08-33, -08-50
BPW 2-14-00, -14-33, -14-50
No Load Pow e r VS Input Voltage
150
Input Power (mW)
130
110
90
70
50
30
10
85
110
135
160
185
210
235
260
Input Voltage (Vac)
V-I, typical
10
9
8
7
6
5
4
3
2
1
0
0
100
200
300
Constant Power Region
Vo, volts
400
Io, mA
500
600
700
800
EMI, conducted, dBμV, typical
EMI, radiated signal strength, dBμV/m, typical
P eak R epetitive P ulse Lo ading
16
2000
Output C
urrent(m )
A
1750
1500
1250
1000
750
500
250
0
0.000
2.083
4.165
6.248
Tim e (m S)
8.330
8V M ax
Ipk
1
4V
max Ipk
Output Regulation, Vo
14
12
10
8
6
4
0
8.3
16.6
24.9
33.2
Time, mSec
41 .5
49.8
100% Load
50% Load
25% Load
BIAS Power
BPW 2 Series Data Sheet, Page
2 of 5
Revised 01/26/2011
Specifications subject to change
www.biaspower.com
BIAS 2 Watt Power Supply
BPW 2 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPW 2-08-00, -08-33, -08-50
BPW 2-14-00, -14-33, -14-50
2.50
Output Power (W)
2.40
2.30
2.20
2.10
2.00
1.90
1.80
Typical Output Pow er VS Tem perature
60Hz
8V Model
2.20
Output Power (W)
85Vac
1
20Vac
240Vac
265Vac
Minim um Output Pow er VS Tem perature
60Hz
8V Mode l
85Vac
1
20Vac
240Vac
265Vac
2.10
2.00
1.90
1.80
1.70
1.60
0
10 20
30 40 50
Temp (C)
60
70
0
10
20
30
40
50
60 70
Temp (C)
Typical Output Pow er VS Tem perature
50Hz
8V Mode l
2.10
Output Power (W)
85Vac
1
20Vac
240Vac
265Vac
Minim um Output Pow er VS Tem perature
50Hz
8V Mode l
1.80
Output Power (W)
1.70
1.60
1.50
1.40
1.30
85Vac
1
20Vac
240Vac
265Vac
2.00
1.90
1.80
1.70
1.60
0
10
20
30 40 50
Temp (C)
60
70
0
10
20
30 40 50 60
Temp (C)
70
BIAS Power
BPW 2 Series Data Sheet, Page
3 of 5
Revised 01/26/2011
Specifications subject to change
www.biaspower.com
BIAS 2 Watt Power Supply
BPW 2 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPW 2-08-00, -08-33, -08-50
BPW 2-14-00, -14-33, -14-50
2.60
Output Power (W)
2.50
2.40
2.30
2.20
2.10
2.00
1.90
Typical Output Pow er VS Tem perature
60Hz
14V Model
Minim um Output Pow er VS Tem perature
60Hz
14V Model
2.20
Output Power (W)
85Vac
1
20Vac
240Vac
265Vac
2.10
2.00
1.90
1.80
1.70
1.60
1.50
0
10
20
30 40 50
Temp (C)
60
70
85Vac
1
20Vac
240Vac
265Vac
0
10
20
30
40
50
60
70
Temp (C)
Typical Output Pow er VS Tem perature
50Hz
14V Model
2.20
Output Power (W)
2.10
2.00
1.90
1.80
1.70
1.60
1.50
0
10
20
30 40 50
Temp (C)
60
70
85Vac
1
20Vac
240Vac
265Vac
Minim um Output Pow er VS Tem perature
50Hz
14V Model
1.80
Output Power (W)
1.70
1.60
1.50
1.40
1.30
0
10
20
30 40 50
Temp (C)
60
70
85Vac
1
20Vac
240Vac
265Vac
BIAS Power
BPW 2 Series Data Sheet, Page
4 of 5
Revised 01/26/2011
Specifications subject to change
www.biaspower.com
BIAS 2 Watt Power Supply
BPW 2 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPW 2-08-00, -08-33, -08-50
BPW 2-14-00, -14-33, -14-50
Part Number Designation
Part Number
BPW 2-08-00
BPW 2-14-00
BPW 2-08-33
BPW 2-08-50
BPW 2-14-33
BPW 2-14-50
Output Configuration
Single output
Single output
Dual Output
Dual Output
Dual Output
Dual Output
Vo
8 VDC
14 VDC
8 VDC
8 VDC
14 VDC
14 VDC
Vr
N/A
N/A
3.3 VDC
5 VDC
3.3 VDC
5 VDC
For custom configurations, contact BIAS Power.
PIN
L1
L2
N/C
Vo
GND
Vr
N/C
Input High
Input Low
No Connection
Output
Ground
Vr Output
No Connection
Isolation, Bottom View
Recommended Land Pattern, top view
NOTES
1. Pins 0.031” [0.787 mm] round
2. Pins extend 0.125” [3.175 mm]
below stand-offs
BIAS Power
BPW 2 Series Data Sheet, Page
5 of 5
Revised 01/26/2011
Specifications subject to change
www.biaspower.com
