HA1SV12004 Datasheet, PDF (6/11 Pages) Delta Electronics, Inc. – 50W DC/DC Power Modules

When installed into a Class II equipment (without
grounding), spacing consideration should be given to
the end-use installation, as the spacing between the
module and mounting surface have not been evaluated.
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
This power module is not internally fused. To achieve
optimum safety and system protection, an input line fuse
is highly recommended. The safety agencies require a
normal-blow fuse with 5A maximum rating to be installed
in the ungrounded lead. A lower rated fuse can be used
based on the maximum inrush transient energy and
maximum input current.
Soldering and Cleaning Considerations
Post solder cleaning is usually the final board assembly
process before the board or system undergoes electrical
testing. Inadequate cleaning and/or drying may lower the
reliability of a power module and severely affect the
finished circuit board assembly test. Adequate cleaning
and/or drying is especially important for un-encapsulated
and/or open frame type power modules. For assistance
on appropriate soldering and cleaning procedures,
please contact Delta’s technical support team.
FEATURES DESCRIPTIONS
Over-Current Protection
The modules include an internal output over-current
protection circuit, which will endure current limiting for
an unlimited duration during output overload. If the
output current exceeds the OCP set point, the modules
will shut down, and will try to restart after
shutdown(hiccup mode). If the overload condition still
exists, the module will shut down again. This restart trial
will continue until the overload condition is corrected.
Over-Voltage Protection
The modules include an internal output over-voltage
protection circuit, which monitors the voltage on the
output terminals. If this voltage exceeds the over-voltage
set point, the protection circuit will constrain the max
duty cycle to limit the output voltage, if the output
voltage continuously increases the modules will shut
down, and then restart after a hiccup-time (hiccup
mode).
Over-Temperature Protection
The over-temperature protection consists of circuitry
that provides protection from thermal damage. If the
module will shut down.The module will restart after the
temperature is within specification
.
Remote On/Off
The remote on/off feature on the module can be either
negative or positive logic. Negative logic turns the module
on during a logic low and off during a logic high. Positive
logic turns the modules on during a logic high and off
during a logic low.
Remote on/off can be controlled by an external switch
between the on/off terminal and the Vi (-) terminal. The
switch can be an open collector or open drain. For
negative logic if the remote on/off feature is not used,
please short the on/off pin to Vi (-). For positive logic if the
remote on/off feature is not used, please leave the on/off
pin to floating.
Figure 14: Remote on/off implementation
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point,
connect an external resistor between the TRIM pin and
SENSE(+) pin or SENSE(-) pin. The TRIM pin should be
left open if this feature is not used.
For trim down, the external resistor value required to
obtain a percentage of output voltage change △% is
defined as:
Rtrim

down

 10*Vnom *(1 )
_{Vnom Vnom *(1 )}
_{K}

Ex. When Trim-down -10% (12V×0.9=10.8V)
Rtrim

down

 10 *12 * 0.9
_{12 12*0.9}
_{K}

90K
For trim up, the external resistor value required to obtain
a percentage output voltage change △% is defined as:
Rtrim

up

Vnom * 7.92(1 )
Vnom *（1 ）* 0.208 
2.5
K
Ex. When Trim-up +10% (12V×1.1=13.2V)
Rtrim

up

12
12 7.92
*（1 0.1）*
(1 0.1）
0.208  2.5

419K
The output voltage can be increased by both the remote
sense and the trim, however the maximum increase is the
larger of either the remote sense or the trim, not the sum
of both.
DS_HA1SV12004_04082016
E-mail: [e-mail]
http://www.deltaww.com/dcdc _P6