BIAS Power Supply Module
BPS 4 Series Data Sheet
Single (Vo) or Dual (Vo & Vr) output
BPS 4-08-00, -08-33, -08-50
BPS 4-14-00, -14-33, -14-50
BPS 4-24-00
The BPS 4 Power Supply Module is an ideal solution for numerous
control applications in lighting, sensing, smart building and power
distribution. This low-cost supply provides up to four watts of
output power at 8, 14 and 24 VDC (Vo) and optional 3.3 and 5.0
VDC (Vr) output for microprocessors, logic, timing circuits, transceivers, sensors or other control functions. Incorporating a custom integrated circuit into a small package (1.94 in3 [31.8 cm3])
the BIAS Module provides an immediate “drop-in” solution, requiring no additional external components.
Features
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Universal Input (85-265 VAC, 50/60Hz)
Small Size—1.94 in3 [31.8 cm3]
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)
Bias Power AC/DC power supplies are designed to be
applied in two major categories of applications…
Operating Specifications
(@120VAC / 60 Hz / 25ºC unless otherwise specified)
Electrical
Input Voltage Range
85 - 265 VAC (50/60Hz)
Input Surge Withstand
308V, < 30 sec
Output Power (Pmax)
4 W min. (60Hz)
3.33 W min. (50Hz)
Efficiency
≥ 70%
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)
1.75 V p:p
0.25 V p:p
For Vo = 8V, Ir out 160mA max, Io+Ir ≤ 500mA*
For Vo = 14V, Ir out 70mA max, Io+Ir ≤ 285mA*
For Vo = 24V, Vr not available
Output Vr, 3.3 volt (+/- 5%)
For Vo = 8V, Ir out 250mA max, Io+Ir ≤ 500mA*
For Vo = 14V, Ir out 83mA max, Io+Ir ≤ 285mA*
For Vo = 24V, Vr not available
No-load Consumption
30 mW typical @ Vin=120 VAC
Isolation
3000 VAC (meets UL / CSA / EN Product Safety)
< 10 uA
Short Circuit Protection
Continuous, Pin ≤ 0.7 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)
1.90 x 1.31 x 0.78 inches [48.3 x 33.3 x 19.8 mm]
Safety
Safety Compliance
UL / EN 60950-1 2nd Ed. (CB Report Available)
EMI Emissions
EN 55022, Class B, FCC Part 15, Class B
BIAS Power
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 optimum system performance.
The characteristics of the Vo and Vr outputs are different
and each has application-specific benefits which can provide high value to the system designer.
Output Vr, 5.0 volt (+/- 5%)
Earth Leakage @ 120 VAC
Auxiliary, where the Bias supply is one of two or more supplies and provides power for standby, housekeeping, biasing 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.
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 overloaded and can be shorted indefinitely. The graceful transition 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 designyour-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 protected 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 4 Series Data Sheet, Page 1 of 3
Revised 01/26/2011
Specifications subject to change
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