Datasheet

DS_DCL12S0A0S20NFA_06182014 E-mail: [e-mail]
http://www.deltaww.com/dcdc
P10
FEATURES DESCRIPTIONS
Remote On/Off
The DCL series power modules have an On/Off pin for remote
On/Off operation. Both positive and negative On/Off logic
options are available in the DCL series power modules.
For positive logic module, connect an open collector (NPN)
transistor or open drain (N channel) MOSFET between the
On/Off pin and the GND pin (see figure 30). Positive logic On/Off
signal turns the module ON during the logic high and turns the
module OFF during the logic low. When the positive On/Off
function is not used, leave the pin floating or tie to Vin (module
will be On).
For negative logic module, the On/Off pin is pulled high with an
external pull-up 5kΩ resistor (see figure 31). Negative logic
On/Off signal turns the module OFF during logic high and turns
the module ON during logic low. If the negative On/Off function
is not used, leave the pin floating or tie to GND. (module will be
on)
Vo
O n /O ff
V in
GND
Q1
RL
I
O N /OFF
Figure 30: Positive remote On/Off implementation
Vo
On/Off
Vin
GND
Q1
RL
Rpull-
up
I
ON/O FF
Figure 31: Negative remote On/Off implementation
Input Under voltage Lockout
At input voltages below the input under voltage lockout limit, the
module operation is disabled. The module will begin to operate at
an input voltage above the under voltage lockout turn-on threshold.
Over-Current Protection
To provide protection in an output over load fault condition, the unit
is equipped with internal over-current protection. When the
over-current protection is triggered, the unit enters hiccup mode.
The units operate normally once the fault condition is removed.
Remote Sense
The DCL 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 < 10.
Vo
Sense
Vin
GND
RL
Distribution Losses
Distribution Losses
Distribution
Losses
Distribution
Losses
Figure 32: Effective circuit configuration for remote sense
operation