JNC350R41-TZ Lineage Power, JNC350R41-TZ Datasheet - Page 10

• Manufacturer Part Number: JNC350R41-TZ
• Description: DC/DC Converters & Regulators 350W 24V-28V 12.5A NegLogic TunableLoop
• Manufacturer: Lineage Power

Specifications of JNC350R41-TZ

• Output Power: 350 W
• Input Voltage Range: 18 V to 36 V
• Input Voltage (nominal): 24 V
• Output Voltage (channel 1): 28 V
• Output Current (channel 1): 12.5 A
• Package / Case Size: Half Brick
• Output Voltage: 28 V
• Product: Isolated
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: CC109158457

Data Sheet
August 9, 2010
Feature Description (continued)
Examples:
To trim down the output of a nominal 28V JNC350-T
module to 16.8V
∆% = 40
R
To trim up the output of a nominal 28V JNC350-T
module to 30.8V
Δ% = 10
R
Active Voltage Programming
For both the JNC350Rx and JNC350Rx-T, a Digital-
Analog converter (DAC), capable of both sourcing
and sinking current, can be used to actively set the
output voltage, as shown in Figure 17. The value of
R
the DAC and the desired values for trim-up and trim-
down
technical representative to obtain more details on the
selection for this resistor.
Figure 17. Circuit Configuration to Actively Adjust
the Output Voltage.
Tunable Loop™
The JNC350Rx-T modules have a new feature that
optimizes transient response of the module called
Tunable Loop™.
LINEAGE

R

R
adj - down
adj - up
G
%
adj
adj
%
will be dependent on the voltage step and range of




Δ%.
up
down
= 48.8 kΩ
28
30
= 154.5 k

Please contact your Lineage Power
POWER
V




8 .
488
28



V
28

10
10631
16
V

V
5 .
28
8 .
40



V
k
V
.

45


100
100

111
2 .



k

18 – 36 Vdc Input; 28Vdc Output; 350W Output
JNC350R Power Modules; DC-DC Converters
External capacitors are usually added to the output of
the module for two reasons: to reduce output ripple
and noise and to reduce output voltage deviations
from the steady-state value in the presence of
dynamic load current changes. Adding external
capacitance however affects the voltage control loop
of the module, typically causing the loop to slow down
with sluggish response. Larger values of external
capacitance could also cause the module to become
unstable.
The Tunable Loop
adjust the voltage control loop to match the filter
network connected to the output of the module. The
Tunable Loop
series R-C between the SENSE(+) and TRIM pins of
the module, as shown in Figure 18. This R-C allows
the user to externally adjust the voltage loop feedback
compensation of the module.
Figure 18. Circuit diagram showing connection of
R
module.
Recommended values of R
output capacitor combinations are given in Tables 1
and 2. Table 1 shows the recommended values of
R
capacitors up to 8000F that might be needed for an
application to meet output ripple and noise
requirements. Selecting R
Table 2 will ensure stable operation of the module
In applications with tight output voltage limits in the
presence of dynamic current loading, additional
output capacitance will be required. Table 2 lists
recommended values of R
meet 2% output voltage deviation limits for some
common output voltages in the presence of a 6A to
12A step change (50% of full load), with an input
voltage of 24V.
Table 1. General recommended values of of R
and C
ceramic capacitor combinations.
TUNE
TUNE
R
C
Cout(µF)
TUNE
TUNE
and C
and C
TUNE
(k
(pF)
for V
TUNE
TUNE
TM
1320
1000
470
out
is implemented by connecting a
for different values of ceramic output
to tune the control loop of the
TM
=28V and various external
allows the user to externally
2200
6800
100
TUNE
TUNE
TUNE
and C
10000 10000 10000
4400
and C
36.5
and C
TUNE
TUNE
TUNE
6600
36.5
according to
in order to
for different
8000
36.5
TUNE
10