JW100C1 Lineage Power, JW100C1 Datasheet - Page 10

• Manufacturer Part Number: JW100C1
• Manufacturer: Lineage Power

dc-dc Converters; 36 to 75 Vdc Input, 15 Vdc Output; 50 W to 150 W
Feature Descriptions
Overcurrent Protection
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
output 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.
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
switch can be an open collector or equivalent (see
Figure 20). A logic low is V
maximum I
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
following:
n
n
10
10
For negative logic, short ON/OFF pin to V
For positive logic, leave ON/OFF pin open.
Figure 20. Remote On/Off Implementation
on/off
V
I
on/off
on/off
during a logic low is 1 mA. The switch
ON/OFF
V
V
I
I
(+)
(–)
I
(–) terminal (V
on/off
SENSE(+)
SENSE(–)
= 0 V to 1.2 V. The
V
V
on/off
O
O
(+)
(–)
on/off
= 15 V is 50 µA.
on/off
generated by
I
(–).
). The
LOAD
8-720 (C).c
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.:
The voltage between the V
must not exceed 15.5 V. This limit includes any
increase in voltage due to remote-sense compensation
and output voltage set-point adjustment (trim). See Fig-
ure 21.
If not using the remote-sense feature to regulate the
output at the point of load, then connect SENSE(+) to
V
Although the output voltage can be increased by both
the remote sense and by the trim, the maximum
increase for the output voltage is not the sum of both.
The maximum increase is the larger of either the
remote sense or the trim. Consult the factory if you
need to increase the output voltage more than the
above limitation.
The amount of power delivered by the module is defined
as the voltage at the output terminals multiplied by the
output current. When using remote sense and trim, the
output voltage of the module can be increased, which at
the same output current would increase the power output
of the module. Care should be taken to ensure that the
maximum output power of the module remains at or
below the maximum rated power.
Figure 21. Effective Circuit Configuration for
O
[V
(+) and SENSE(–) to V
O
SUPPLY
(+) – V
RESISTANCE
CONTACT
Single-Module Remote-Sense Operation
O
(–)] – [SENSE(+) – SENSE(–)] ð 0.5 V
I
I
V
V
I
I
(+)
(–)
SENSE(+)
SENSE(–)
O
O
(–) at the module.
(+) and V
V
V
O
O
(+)
(–)
DISTRIBUTION LOSSES
I
O
O
(–) terminals
CONTACT AND
Lineage Power
April 2008
LOAD
8-651 (C).m