BIAS 1 Watt Power Supply
BPW 1 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPW 1-08-00, -08-33, -08-50
BPW 1-14-00, -14-33, -14-50
Actual Size
The BPS Power Supply Module is an ideal solution for numerous con-
trol applications in lighting, sensing, smart building/home and power
distribution where operation from 277VAC mains is required. This
low-cost supply provides up to one watt of output power at 8 or 14
VDC (Vo) and an optional 3.3 or 5 VDC (Vr) output for microproces-
sors, logic, timing circuits, transceivers, sensors or other control func-
tions. A patented design incorporating a custom integrated circuit
into a small package (0.55 in3 [9.0 cm3]) the BIAS Module provides an
immediate “drop-in” solution, requiring no additional external com-
ponents.
Features
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Universal Input (90-308 VAC, 50/60Hz)
Small Size—0.55in3 [9.0cm3]
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 Require-
Bias Power AC/DC power supplies are designed to be
applied in two major categories of applications…
Operating Specifications
(@120VAC / 60 Hz / 25°C unless otherwise specified)
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.
Electrical
Input Voltage Range
90 - 308 VAC (50/60Hz)
345V, < 30 sec
Input Surge Withstand
1.0 W min. (60Hz)
0.83 W min. (50Hz)
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.
Output Power (Pmax)
Efficiency
70% nom.
Output Vo (Peak)
8 or 14 VDC nom. +/- 5%
+/- 1% Po < Pmax
+/- 2% Po < Pmax
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.
Line / Load Regulation Vo (Peak)
Temperature Regulation Vo (Peak)
Ripple Vo (@120 Hz)
(@ 100 kHz)
1.00 V p:p
0.25 V p:p
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.
For Vo = 8V, Ir out 53mA max, Io+Ir ≤ 125mA*
For Vo = 14V, Ir out 23mA max, Io+Ir ≤ 71mA*
Output Vr, 3.3 volt (+/- 5%)
Output Vr, 5.0 volt (+/- 5%)
For Vo = 8V, Ir out 83mA max, Io+Ir ≤ 125mA*
For Vo = 14V, Ir out 28mA max, Io+Ir ≤ 71mA*
No-load Consumption
Isolation
30 mW typical @ Vin=120 VAC
3000 VAC (meets UL / CSA & EN Product Safety)
< 10 uA
Earth Leakage @ 120 VAC
Short Circuit Protection
Continuous, Pin ≤ 0.6 w @ Vin = 120 VAC
> 500 Khr MTBF
Reliability @ 25° C, MIL HDBK-217F
Thermal
Operating Temperature
Operating Relative Humidity
Storage Temperature
Mechanical
-30 to +70o C
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.
0 – 95%, non-condensing
-40 to +105o C
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
*Note: maximum currents specified for constant voltage
range only. See V-I curve on page 2 for Vo in constant
power range.
Safety Compliance
EMI Emissions
UL / EN 60950-1 2nd Ed. (CB Report Available)
EN 55022, Class B, FCC Part 15, Class B
BPW 1 Series Data Sheet, Page 1 of 5
BIAS Power
Revised 01/26/2011
www.biaspower.com
Specifications subject to change
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