JPW200S52R5-BH Power Module; dc-dc Converter
38 Vdc - 75 Vdc Input, 52.5 Vdc Output; 200W
Data Sheet
March 26, 2008
modules are rated 94V-0.
Remote Sense
The input to these units is to be provided with a maximum 10
A fast-acting (or time-delay) fuse in the unearthed lead.
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 ter-
minals must not exceed the output voltage sense range
given in the Feature Specifications table, i.e.:
Feature Descriptions
[VO(+) – VO(–)] – [SENSE(+) – SENSE(–)] = 0.5 V
Overcurrent Protection
The voltage between the VO(+) and VO(–) terminals must
not exceed 56.5 V. This limit includes any increase in voltage
due to remote-sense compensation and output voltage set-
point adjustment (trim). See Figure 13.
To provide protection in an overcurrent fault condition, the
module is equipped with internal current-limiting circuitry and
can endure current limiting for an unlimited duration. Upon
current limit inception threshold, the module enters a “hic-
cup” mode of operation, whereby it shutdown and automati-
cally attempts to restart. While the overcurrent fault condition
persist, the module will remain in the hic-cup mode until the
overcurrent fault is cleared. See Figure 2a.
If not using the remote-sense feature to regulate the output
at the point of load, then connect SENSE(+) to VO(+) and
SENSE(–) to VO(–) at the module.
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.
Remote On/Off
Two remote on/off options are available. Positive logic
remote on/off turns the module on during a logic-high volt-
age on the ON/OFF pin, and off during a logic low. Negative
logic remote on/off turns the module off during a logic high
and on during a logic low. Negative logic (code suffix “1”) is
the factory-preferred configuration.
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 volt-
age of the module can be increased, which at the same out-
put 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.
To turn the power module on and off, the user must supply a
switch to control the voltage between the
on/off terminal (Von/off) and the VI(–) terminal . The switch
can be an open collector or equivalent (see
Figure 12). A logic low is Von/off = 0 V to 0.3 V. The
maximum Ion/off 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 Von/off generated by the
power module is 5 V. The maximum allowable leakage cur-
rent of the switch at Von/off = 5 V is 50 µA.
SENSE(+)
SENSE(–)
VI(+)
VI(–)
VO(+)
VO(–)
If not using the remote on/off feature, do one of the
following:
IO
SUPPLY
LOAD
II
CONTACT
RESISTANCE
CONTACT AND
DISTRIBUTION LOSSES
n
n
For negative logic, short ON/OFF pin to VI(–).
For positive logic, leave ON/OFF pin open.
Figure 13. Effective Circuit Configuration for
Single-Module Remote-Sense Operation
Output Voltage.
.
I
on/off
ON/OFF
+
V
on/off
–
Output Overvoltage Protection
SENSE(+)
(+)
The output overvoltage clamp consists of control circuitry,
independent of the primary regulation loop, that monitors the
voltage on the output terminals. The over voltage clamp cir-
cuit has a higher voltage set point than the primary loop (see
Feature Specifications table). This provides a redundant
voltage control that reduces the risk of output overvoltage. If
the output voltage exceeds the overvoltage threshold, the
module enters a “hic-cup” mode of operation, whereby it
shutdown and automatically attempts to restart. While the
fault condition exists, the module will remain in the hic-cup
mode until the overvoltage fault is cleared.
VO
LOAD
VO(–)
V
I
(+)
(–)
SENSE(–)
VI
Figure 12. Remote On/Off Implementation.
Lineage Power
8
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
