BPS 2 Series Data Sheet, Page 1 of 5
BIAS Power Revised 01/26/2011 www.biaspower.com
Specifications subject to change
BIAS 2 Watt Power Supply
BPS 2 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPS 2-08-00, -08-33, -08-50
BPS 2-14-00, -14-33, -14-50
BPS 2-24-00 Features
• Universal Input (85-265 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)
The BPS Power Supply Module is an ideal solution for numerous con-
trol applications in lighting, sensing, smart building/home and power
distribution. This low-cost supply provides up to two watts of output
power at 8, 14 or 24VDC (Vo) and an optional 3.3 or 5 VDC (Vr) out-
put for logic functions such as a microprocessor, logic, timing circuits,
transceivers or sensors. 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 addi-
tional external components.
Operating Specifications
(@120VAC / 60 Hz / 25°C unless otherwise specified)
Electrical
Input Voltage Range
85 - 265 VAC (50/60Hz)
Input Surge Withstand
308V, < 30 sec
Output Power (Pmax)
2.0 W min. (60Hz)
1.67 W min. (50Hz)
Efficiency
70% nom.
Output Vo (Peak)
8, 14 or 24 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 160mA max, Io+Ir ≤ 250mA*
For Vo = 14V, Ir out 70mA max, Io+Ir ≤ 143mA*
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)
1.35 x 1.12 x 0.58 inches
[34.214 x 28.372 x 14.757 mm]
Safety
Safety Compliance
UL / EN 60950-1 2nd 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 250mA max, Io+Ir ≤ 250mA*
For Vo = 14V, Ir out 83mA max, Io+Ir ≤ 143mA*
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.
BPS 2 Series Data Sheet, Page 2 of 5
BIAS Power Revised 01/26/2011 www.biaspower.com
Specifications subject to change
BIAS 2 Watt Power Supply
BPS 2 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPS 2-08-00, -08-33, -08-50
BPS 2-14-00, -14-33, -14-50
BPS 2-24-00
No Load Pow e r 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 epetitive 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
0 100 200 300 400 5 00 600 700 800
V
o
,
v
o
l
t
s
Io, mA
V-I, typical
Constant Power Region
6
8
10
12
14
16
18
20
22
24
0 8.3 16.6 24.9 33.2 41.5 49.8
Ti me, mSec
Output R egulation, Vo
100% Load
50% Load
25% Load
EMI, conducted, dBμV, typical
EMI, radiated signal strength, dBμV/m, typical
BPS 2 Series Data Sheet, Page 3 of 5
BIAS Power Revised 01/26/2011 www.biaspower.com
Specifications subject to change
BIAS 2 Watt Power Supply
BPS 2 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPS 2-08-00, -08-33, -08-50
BPS 2-14-00, -14-33, -14-50
BPS 2-24-00
Minim um Output Pow er VS Tem perature
50Hz
8V Model
1.30
1.40
1.50
1.60
1.70
1.80
0 10 20 30 40 50 60 70
Temp (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
Typical Output Pow er VS Tem perature
50Hz
8V Model
1.60
1.70
1.80
1.90
2.00
2.10
0 10 20 30 40 50 60 70
Temp (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
Minim um Output Pow er VS Tem perature
60Hz
8V Model
1.60
1.70
1.80
1.90
2.00
2.10
2.20
0 10 20 30 40 50 60 70
Temp (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
Typical Output Pow er VS Tem perature
60Hz
8V Model
1.80
1.90
2.00
2.10
2.20
2.30
2.40
2.50
0 10 20 30 40 50 60 70
Temp (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
BPS 2 Series Data Sheet, Page 4 of 5
BIAS Power Revised 01/26/2011 www.biaspower.com
Specifications subject to change
BIAS 2 Watt Power Supply
BPS 2 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPS 2-08-00, -08-33, -08-50
BPS 2-14-00, -14-33, -14-50
BPS 2-24-00
Minim um Output Pow er VS Tem pe rature
60Hz
14V Model
1.50
1.60
1.70
1.80
1.90
2.00
2.10
2.20
0 10 20 30 40 50 60 70
Temp (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
Typical Output Pow er VS Tem perature
50Hz
14V Model
1.50
1.60
1.70
1.80
1.90
2.00
2.10
2.20
0 10 20 30 40 50 60 70
Temp (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
Minim um Output Pow er VS Te m perature
50Hz
14V Model
1.30
1.40
1.50
1.60
1.70
1.80
0 10 20 30 40 50 60 70
Temp (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
Typical Output Pow er VS Tem perature
60Hz
14V Model
1.90
2.00
2.10
2.20
2.30
2.40
2.50
2.60
0 10 20 30 40 50 60 70
Temp (C)
Output Power (W)
85Vac
120Vac
240Vac
265Vac
BPS 2 Series Data Sheet, Page 5 of 5
BIAS Power Revised 01/26/2011 www.biaspower.com
Specifications subject to change
BIAS 2 Watt Power Supply
BPS 2 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPS 2-08-00, -08-33, -08-50
BPS 2-14-00, -14-33, -14-50
BPS 2-24-00
Part Number Designation
Part Number
Output Configuration
Vo
Vr
BPS 2-08-00
Single output
8 VDC
N/A
BPS 2-14-00
Single output
14 VDC
N/A
BPS 2-24-00
Single output
24 VDC
N/A
BPS 2-08-33
Dual Output
8 VDC
3.3 VDC
BPS 2-08-50
Dual Output
8 VDC
5 VDC
BPS 2-14-33
Dual Output
14 VDC
3.3 VDC
BPS 2-14-50
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
