DS_DCL12S0A0S20NFA_11152012

E-mail: DCDC@delta.com.tw

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 /O F F

Figure 30: Positive remote On/Off implementation

Vo

On/Off

Vin

GND

Q1

RL

Rpull-

up

I

O N /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