107201634 Lineage Power, 107201634 Datasheet - Page 9

• Manufacturer Part Number: 107201634
• Description: Module DC-DC 1-OUT 5V 10A 50W 9-Pin
• Manufacturer: Lineage Power
• Type: Step Downr

Specifications of 107201634

• Output Current: 10 A
• Output Voltage: 5 V
• Input Voltage: 28 V
• Number Of Outputs: 1
• Output Power: 50 W

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 14, a 33 µF
electrolytic capacitor (ESR < 0.7 Ω at 100 kHz)
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 22.2-950, and EN60950.
For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), the
input must meet SELV requirements.
If the input meets extra-low voltage (ELV) require-
ments, then the converter’s output is considered ELV.
The input to these units is to be provided with a maxi-
mum 20 A normal-blow fuse in the ungrounded lead.
Electrical Descriptions
Current Limit
To provide protection in a fault (output overload) condi-
tion, the unit is equipped with internal current-limiting
circuitry and can endure current limiting for an unlim-
ited duration. At the point of current-limit inception, the
unit shifts from voltage control to current control. If the
coutput voltage is pulled very low during a severe fault,
the current-limit circuit can exhibit either foldback or tai-
lout characteristics (output current decrease or
increase). The unit operates normally once the output
current is brought back into its specified range.
March 2008
Lineage Power
18 Vdc to 36 Vdc Input, 5 Vdc Output; 50 W to 100 W
Feature Descriptions
Remote On/Off
Two remote on/off options are available. Positive logic
remote on/off turns the module on during a logic-high
voltage on the ON/OFF pin, and off during a logic low.
Negative logic remote on/off turns the module off dur-
ing a logic high and on during a logic low. Negative
logic (code suffix “1”) is the factory-preferred configura-
tion.
To turn the power module on and off, the user must
supply a switch to control the voltage between the on/
off terminal and the V
can be an open collector or equivalent (see Figure 17).
A logic low is V
during a logic low is 1 mA. The switch should maintain
a logic-low voltage while sinking 1 mA.
During a logic high, the maximum V
the power module is 15 V. The maximum allowable
leakage current of the switch at V
If not using the remote on/off feature, do one of the fol-
lowing:
n
n
Remote Sense
Remote sense minimizes the effects of distribution
losses by regulating the voltage at the remote-sense
connections. The voltage between the remote-sense
pins and the output terminals must not exceed the out-
put voltage sense range given in the Feature Specifica-
tions table, i.e.:
For negative logic, short ON/OFF pin to V
For positive logic, leave ON/OFF pin open.
[V
Figure 17. Remote On/Off Implementation
O
(+) – V
V
I
on/off
on/off
+
–
O
on/off
(–)] – [SENSE(+) – SENSE(–)] ≤ 0.5 V
ON/OFF
V
V
I
I
(+)
(–)
= 0 V to 1.2 V. The maximum I
I
(-) terminal (V
SENSE(+)
SENSE(–)
on/off
V
V
O
O
on/off
on/off
(+)
(–)
= 15 V is 50 μA.
). The switch
generated by
I
(-)
8-720 (C).c
LOAD
on/off
9