HW006/010/012 Series Power Modules; dc-dc Converters
36-75 Vdc Input; 1.2 Vdc to 5 Vdc Output; 6.6A to 12A
Data Sheet
June 26, 2009
Test Configurations
Safety Considerations
For safety-agency approval of the system in which the power
module is used, the power module must be installed in com-
pliance with the spacing and separation requirements of the
end-use safety agency standard, i.e., UL60950, CSA C22.2
No. 60950-00, and
TO OSCILLOSCOPE
CURRENT
PROBE
LTEST
VI(+)
12 µH
S 220 µF
C
VDE 0805:2001-12 (IEC60950, 3rd Ed).
33 µF
ESR < 0.7 Ω
@ 100 kHz
ESR < 0.1 Ω
@ 20 ˚C, 100 kHz
BATTERY
These converters have been evaluated to the spacing
requirements for Basic Insulation, per the above safety stan-
dards.
VI(-)
For Basic Insulation models ("–B" Suffix), 1500 Vdc is
applied from VI to VO to 100% of outgoing production.
Note: Measure input reflected ripple current with a simulated source
inductance (LTEST) of 12µH. Capacitor CS offsets possible
battery impedance. Measure current as shown above.
For end products connected to –48 Vdc, or –60 Vdc nomianl
DC MAINS (i.e. central office dc battery plant), no further
fault testing is required.
Figure 37. Input Reflected Ripple Current Test Setup.
Note:–60 V dc nominal bettery plants are not available in the
U.S. or Canada.
COPPER STRIP
For all input voltages, other than DC MAINS, where the input
voltage is less than 60 Vdc, if the input meets all of the
requirements for SELV, then:
V
O
(+)
(–)
RESISTIVE
LOAD
1.0 µF
10 µF
SCOPE
n
The output may be considered SELV. Output voltages will
remain withing SELV limits even with internally-generated
non-SELV voltages. Single component failure and fault
tests were performed in the power converters.
V
O
n
One pole of the input and one pole of the output are to be
grounded, or both circuits are to be kept floating, to main-
tain the output voltage to ground voltage within ELV or
SELV limits.
GROUND PLANE
Note: Scope measurements should be made using a BNC socket,
with a 10 µF tantalum capacitor and a 1 µF ceramic capcitor.
Position the load between 51 mm and 76 mm (2 in and 3 in)
from the module
For all input sources, other than DC MAINS, where the input
voltage is between 60 and 75 Vdc (Classified as TNV-2 in
Europe), the following must be adhered to, if the converter’s
output is to be evaluated for SELV:
Figure 38. Peak-to-Peak Output Ripple Measurement
Test Setup.
n
n
n
The input source is to be provided with reinforced insula-
tion from any hazardous voltage, including the AC mains.
CONTACT AND
DISTRIBUTION LOSSES
One VI pin and one VO pin are to be reliably earthed, or
both the input and output pins are to be kept floating.
V
I
(+)
VO(+)
I
O
I
I
Another SELV reliability test is conducted on the whole
system, as required by the safety agencies, on the combi-
nation of supply source and the subject module to verify
that under a single fault, hazardous voltages do not
appear at the module’s output.
LOAD
SUPPLY
VI
(–)
VO(–)
CONTACT
RESISTANCE
The power module has ELV (extra-low voltage) outputs
when all inputs are ELV.
Note: All voltage measurements to be taken at the module termi-
nals, as shown above. If sockets are used then Kelvin con-
nections are required at the module terminals to avoid
measurement errors due to socket contact resistance.
All flammable materials used in the manufacturing of these
modules are rated 94V-0, and UL60950A.2 for reduced
thicknesses. The input to these units is to be provided with a
maximum 5A time-delay in the unearthed lead.
Figure 39. Output Voltage and Efficiency Test Setup.
[V
– V ] × I
O(-) O
⎠
– V ] × I
I(-) I
O(+)
⎛
⎞
η = ------------------------------------------------ × 100
⎝
[V
I(+)
Lineage Power
12
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
