JAHW050F1-S Lineage Power, JAHW050F1-S Datasheet - Page 8

• Manufacturer Part Number: JAHW050F1-S
• Manufacturer: Lineage Power

JAHW050F-S and JAHW075F-S Power Modules; dc-dc Converters:
36 Vdc to 75 Vdc Input, 3.3 Vdc Output; 50 W to 75 W
Test Configurations
Note: Measure input reflected-ripple current with a simulated source
Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or tan-
Figure 13. Peak-to-Peak Output Noise
Note: All measurements are taken at the module terminals. When
Figure 14. Output Voltage and Efficiency
8 8
BATTERY
SUPPLY
Figure 12. Input Reflected-Ripple Test Setup
inductance (L
tery impedance. Measure current as shown above.
talum capacitor. Scope measurement should be made using a
BNC socket. Position the load between 51 mm and 76 mm
(2 in. and 3 in.) from the module.
socketing, place Kelvin connections at module terminals to
avoid measurement errors due to socket contact resistance.
RESISTANCE
V
V
=
CONTACT
O
O
(+)
(–)
TO OSCILLOSCOPE
----------------------------------------------- - x 100
V
Measurement Test Setup
Measurement Test Setup
I
V
I
O
I
(+) – V
(+) – V
TEST
COPPER STRIP
1.0 F
C
ESR < 0.1
@ 20 C, 100 kHz
) of 12 µH. Capacitor C
V
V
S
I
I
(+)
(–)
220 F
O
I
(–) I
(–) I
12 H
L
SENSE(+)
SENSE(–)
TEST
I
10 F
O
V
V
O
O
(+)
(–)
ESR < 0.7
SCOPE
@ 100 kHz
DISTRIBUTION LOSSES
CURRENT
S
I
33 F
O
PROBE
offsets possible bat-
CONTACT AND
%
RESISTIVE
LOAD
LOAD
8-513 (F).d
8-203 (F).l
8-749 (F)
V
V
I
I
(+)
(–)
Design Considerations
Input Source Impedance
The power module should be connected to a low
ac-impedance input source. Highly inductive source
impedances can affect the stability of the power mod-
ule. For the test configuration in Figure 12, a 33 µF
electrolytic capacitor (ESR < 0.7
mounted close to the power module helps ensure sta-
bility of the unit. For other highly inductive source
impedances, consult the factory for further application
guidelines.
Safety Considerations
For safety-agency approval of the system in which the
power module is used, the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standard,
i.e., UL 1950, CSA C22.2 No. 950-95, and VDE 0805
(EN60950, IEC950).
If the input source is non-SELV (ELV or a hazardous
voltage greater than 60 Vdc and less than or equal to
75 Vdc), for the module's output to be considered
meeting the requirements of safety extra-low voltage
(SELV), all of the following must be true:
Note: Do not ground either of the input pins of the
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
The input source is to be provided with reinforced
insulation from any other hazardous voltages, includ-
ing the ac mains.
One V
both the input and output pins are to be kept floating.
The input pins of the module are not operator acces-
sible.
Another SELV reliability test is conducted on the
whole system, as required by the safety agencies, on
the combination of supply source and the subject
module to verify that under a single fault, hazardous
voltages do not appear at the module's output.
module without grounding one of the output
pins. This may allow a non-SELV voltage to
appear between the output pins and ground.
I
pin and one V
O
pin are to be grounded, or
Tyco Electronics Corp.
November 2000
at 100 kHz)
Data Sheet