BPW 0.5 Series Data Sheet, Page 1 of 5
BIAS Power Revised 05/06/2011 www.biaspower.com
Specifications subject to change
BIAS 1/2 Watt Power Supply
BPW 0.5 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPW 0.5-08-00, -08-33, -08-50
BPW 0.5-14-00, -14-33, -14-50
Features
• Universal Input (90-308 VAC, 50/60Hz)
• Small Size—0.55in
3
[9.0cm
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)
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 one half watt of output power at 8 or
14 VDC (Vo) and an optional 3.3 or 5 VDC (Vr) output for microproc-
essors, logic, timing circuits, transceivers, sensors or other control
functions. A patented design incorporating a custom integrated cir-
cuit into a small package (0.55 in
3
[9.0 cm
3
]) the BIAS Module pro-
vides an immediate “drop-in” solution, requiring no additional exter-
nal components.
Operating Specifications
(@120VAC / 60 Hz / 25°C unless otherwise specified)
Electrical
Input Voltage Range
90 - 308 VAC (50/60Hz)
Input Surge Withstand
345V, < 30 sec
Output Power (Pmax)
0.5 W min. (60Hz)
0.43 W min. (50Hz)
Efficiency
70% nom.
Output Vo (Peak)
8 or 14 VDC nom. +/- 5%
Line / Load Regulation Vo (Peak)
+/- 1% Po < Pmax
Temperature Regulation Vo (Peak)
+/- 2% Po < Pmax
Ripple Vo (@120 Hz)
(@ 100 kHz)
1.00 V p:p
0.25 V p:p
Output Vr, 3.3 volt (+/- 5%)
For Vo = 8V, Ir out 53mA max, Io+Ir ≤ 63mA*
For Vo = 14V, Ir out 23mA max, Io+Ir ≤ 36mA*
No-load Consumption
30 mW typical @ Vin=120 VAC
Isolation
3000 VAC (meets UL / CSA &
EN Product Safety)
Earth Leakage @ 120 VAC
< 10 uA
Short Circuit Protection
Continuous, Pin ≤ 0.6 w @ Vin = 120 VAC
Reliability @ 25° C, MIL HDBK-217F
> 500 Khr MTBF
Thermal
Operating Temperature
-30 to +70° C
Operating Relative Humidity
0 – 95%, non-condensing
Storage Temperature
-40 to +105° C
Mechanical
Package Size
(L x W x H)
1.10 x 0.92 x 0.55 inches
[27.94 x 23.24 x 13.97 mm]
Safety
Safety Compliance
UL / EN 60950-1 2
nd
Ed. (CB Report Available)
EMI Emissions
EN 55022, Class B, FCC Part 15, Class B
Output Vr, 5.0 volt (+/- 5%)
For Vo = 8V, Ir out 63mA max, Io+Ir ≤ 63mA*
For Vo = 14V, Ir out 28mA max, Io+Ir ≤ 36mA*
Actual Size
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, transceivers, sensors 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.
BPW 0.5 Series Data Sheet, Page 2 of 5
BIAS Power Revised 05/06/2011 www.biaspower.com
Specifications subject to change
BIAS 1/2 Watt Power Supply
BPW 0.5 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPW 0.5-08-00, -08-33, -08-50
BPW 0.5-14-00, -14-33, -14-50
No Load Pow er VS Input Voltage
10
30
50
70
90
110
130
150
85 110 135 160 185 210 235 260
Input Voltage (Vac)
Input Power (mW)
P eak R epet itive P ulse Lo ading
0
250
500
750
1000
1250
1500
1750
2000
0.000 2.083 4.165 6.248 8.330
Tim e (m S)
Output Current(mA)
8V M ax
Ipk
14V
max Ipk
0
2
4
6
8
10
0 50 100 150 200 250
Vo, volts
Io, mA
V-I, typical
Constant Power Region
6
7
8
9
10
11
12
13
14
15
0 8.3 16.6 24.9 33.2 41.5 49.8
Vo, volts for 8, 14 volt ratings
Time, mSec
Output Regulation, Vo
100% Load
50% Load
25% Load
EMI, Radiated Signal Strength, typical, dBμV/m
EMI, Conducted, dBμV
BPW 0.5 Series Data Sheet, Page 3 of 5
BIAS Power Revised 05/06/2011 www.biaspower.com
Specifications subject to change
BIAS 1/2 Watt Power Supply
BPW 0.5 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPW 0.5-08-00, -08-33, -08-50
BPW 0.5-14-00, -14-33, -14-50
Typical Output Pow er VS Tem perature
50Hz
8V Mode l
0.45
0.50
0.55
0.60
0.65
0.70
0 10 20 30 40 50 60 70
Tem p (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
Minim um Output Pow e r VS Te m perature
50Hz
8V Model
0.40
0.45
0.50
0.55
0.60
0.65
0 10 20 30 40 50 60 70
Te m p (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
Typical Output Pow er VS Tem perature
60Hz
8V Mode l
0.55
0.60
0.65
0.70
0.75
0.80
0.85
0 10 20 30 40 50 60 70
Temp (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
Minim um Output Pow e r VS Te m pe rature
60Hz
8V Mode l
0.50
0.55
0.60
0.65
0.70
0.75
0 10 20 30 40 50 60 70
Tem p (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
BPW 0.5 Series Data Sheet, Page 4 of 5
BIAS Power Revised 05/06/2011 www.biaspower.com
Specifications subject to change
BIAS 1/2 Watt Power Supply
BPW 0.5 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPW 0.5-08-00, -08-33, -08-50
BPW 0.5-14-00, -14-33, -14-50
Typical Output Pow er VS Tem perature
50Hz
14V Model
0.50
0.55
0.60
0.65
0.70
0.75
0.80
0 10 20 30 40 50 60 70
Tem p (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
Minim um Output Pow er VS Te m perature
50Hz
14V Model
0.40
0.45
0.50
0.55
0.60
0.65
0 10 20 30 40 50 60 70
Tem p (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
Typical Output Pow er VS Tem perature
60Hz
14V Model
0.60
0.65
0.70
0.75
0.80
0.85
0.90
0.95
0 10 20 30 40 50 60 70
Temp (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
Minim um Output Pow e r VS Te m pe rature
60Hz
14V Model
0.45
0.50
0.55
0.60
0.65
0.70
0.75
0 10 20 30 40 50 60 70
Tem p (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
BPW 0.5 Series Data Sheet, Page 5 of 5
BIAS Power Revised 05/06/2011 www.biaspower.com
Specifications subject to change
BIAS 1/2 Watt Power Supply
BPW 0.5 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPW 0.5-08-00, -08-33, -08-50
BPW 0.5-14-00, -14-33, -14-50
Part Number Designation
Part Number
Output Configuration
Vo
Vr
BPW 0.5-08-00
Single output
8 VDC
N/A
BPW 0.5-14-00
Single output
14 VDC
N/A
BPW 0.5-08-50
Dual Output
8 VDC
5 VDC
BPW 0.5-14-33
Dual Output
14 VDC
3.3 VDC
BPW 0.5-08-33
Dual Output
8 VDC
3.3 VDC
BPW 0.5-14-50
Dual Output
14 VDC
5 VDC
For custom configurations, contact BIAS Power.
PIN
DESIGNATOR
DESCRIPTION
L1 Input High
L2 Input Low
N/C No Connection
Vo Output
GND Ground
Vr Vr Output
N/C No Connection
NOTES
1. Pins 0.031” [0.787 mm] round
2. Pins extend 0.125” [3.175 mm]
below stand-offs
Isolation, Bottom View
Recommended Land Pattern, top view
