DNL04S0A0S16PFD Delta Electronics, Inc., DNL04S0A0S16PFD Datasheet - Page 10

• Manufacturer Part Number: DNL04S0A0S16PFD
• Description: Delphi Dnl, Non-isolated Point Of Load Dc/dc Power Modules 2.8-5.5vin, 0.75-3.3v/16a Out
• Manufacturer: Delta Electronics, Inc.

FEATURES DESCRIPTIONS (CON.)
Over-Temperature Protection
The over-temperature protection consists of circuitry that
provides
temperature exceeds the over-temperature threshold the
module will shut down. The module will try to restart after
shutdown. If the over-temperature condition still exists
during restart, the module will shut down again. This
restart trial will continue until the temperature is within
specification
Remote Sense
The DNM/DNL provide Vo remote sensing to achieve
proper regulation at the load points and reduce effects of
distribution losses on output line. In the event of an open
remote sense line, the module shall maintain local sense
regulation through an internal resistor. The module shall
correct for a total of 0.5V of loss. The remote sense line
impedance shall be < 10Ω.
Figure 36: Effective circuit configuration for remote sense
operation
Output Voltage Programming
The output voltage of the DNM/DNL can be programmed
to any voltage between 0.75Vdc and 3.3Vdc by
connecting one resistor (shown as Rtrim in Figure 37)
between the TRIM and GND pins of the module. Without
this external resistor, the output voltage of the module is
0.7525 Vdc. To calculate the value of the resistor Rtrim for
a particular output voltage Vo, please use the following
equation:
For example, to program the output voltage of the DNL
module to 1.8Vdc, Rtrim is calculated as follows:
DNL can also be programmed by apply a voltage between
the TRIM and GND pins (Figure 38). The following
equation can be used to determine the value of Vtrim
needed for a desired output voltage Vo:
Rtrim
Rtrim
DS_DNL04SMD16A_03052009
=
=
Distribution Losses
⎡
⎢
⎣
⎡
⎢
⎣
1
Vo
8 .
protection
21070
Distribution
−
21070
−
. 0
. 0
7525
7525
−
Vin
5110
−
5110
from
GND
⎤
⎥
⎦
Ω
Sense
⎤
⎥
⎦
Vo
=
Ω
thermal
15
Distribution
L
K
Distribution Losses
Ω
RL
damage.
If
the
For example, to program the output voltage of a DNL
module to 3.3 Vdc, Vtrim is calculated as follows
Figure 37: Circuit configuration for programming output voltage
using an external resistor
Figure 38: Circuit Configuration for programming output voltage
using external voltage source
Table 1 provides Rtrim values required for some common
output voltages, while Table 2 provides value of external
voltage source, Vtrim, for the same common output
voltages. By using a 1% tolerance trim resistor, set point
tolerance of ±2% can be achieved as specified in the
electrical specification.
Vtrim
Vtrim
=
=
Table 1
Table 2
0
0
7 .
7 .
Vo(V)
0.7525
Vo(V)
0.7525
−
−
1.2
1.5
1.8
2.5
3.3
1.2
1.5
1.8
2.5
3.3
. 0
. 0
1698
1698
GND
GND
×
×
(
TRIM
(
Vo
3
TRIM
3 .
Rtrim(KΩ)
Vo
Vo
Vtrim(V)
41.97
23.08
15.00
−
Open
−
6.95
3.16
Open
0.624
0.573
0.522
0.403
0.267
. 0
. 0
Vtrim
+
7525
_
7525
Rtrim
RLoad
)
)
RLoad
=
. 0
267
V
10