Data Sheet
March 26, 2008
Feature Descriptions
(Continued)
Overtemperature Protection
JPW200S52R5-BH Power Module; dc-dc Converter
38 Vdc - 75 Vdc Input, 52.5 Vdc Output; 200W
This limit includes any increase in voltage due to remote-
sense compensation and output voltage set-point adjustment
(trim). See Figure 13.
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.
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.
This module features an overtemperature protection circuit to
safeguard against thermal damage. The protection circuit will
shutdown the module when the maximum case temperature
is exceeded. The module will restart automatically when the
case temperature falls below shutdown threshold.
Output Voltage Set-Point Adjustment (Trim)
Output voltage trim allows the user to increase or decrease
the output voltage set point of a module. This is accom-
plished by connecting an external resistor between the TRIM
pin and either the SENSE(+) or SENSE(–) pins. The trim
resistor should be positioned close to the module.
If not using the trim feature, leave the TRIM pin open.
With an external resistor between the TRIM and SENSE(–)
pins (Radj-down), the output voltage set point (VO, adj)
decreases (see Figure 14). The following equation deter-
mines the required external-resistor value to obtain a per-
centage output voltage change of
Δ%.
V
I
(+)
ON/OFF
CASE
V
I
(–)
V
O
(+)
SENSE(+)
R
adj-up
TRIM
SENSE(–)
V
O
(–)
R
LOAD
100
-
R
adj-down
=
⎛
---------
–
2
⎞
kΩ
⎝ Δ%
⎠
With an external resistor connected between the TRIM and
SENSE(+) pins (Radj-up), the output voltage set point (VO,
adj) increases (see Figure 15).
Note:
Do not exceed 56.5 V between the VO(+) and VO(–)
terminals.
The following equation determines the required external-
resistor value to obtain a percentage output voltage change
of �½
%.
Figure 15. Circuit Configuration to Increase Output
Voltage.
)
V
O
(
100 +
Δ%
-
(
100 + 2Δ%
)
-
R
adj-up
=
⎛
-------------------------------------
–
---------------------------------
⎞
kΩ
⎝
1.225Δ%
⎠
Δ%
The voltage between the VO(+) and VO(–) terminals must not
exceed the minimum output voltage clamp value as indicated
in the Feature Specifications table.
V
I
(+)
ON/OFF
CASE
V
I
(–)
V
O
(+)
SENSE(+)
TRIM
R
adj-down
SENSE(–)
V
O
(–)
R
LOAD
Figure 14. Circuit Configuration to Decrease Output
Voltage.
Lineage Power
9
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
