SLDN-03D1Ax

13

Asia-Pacific

+86 755 298 85888

Europe, Middle East

+353 61 225 977

North America

+1 408 785 5200

© 2019 Bel Power Solutions & Protection

Rev. D1.04.19

For safety agency approval the power module must be installed in compliance with the spacing and separation requirements of the

end-use safety agency standards, i.e., UL 60950-1 2nd, CSA C22.2 No. 60950-1-07, DIN EN 60950-1:2006 + A11 (VDE0805 Teil 1 +

A11):2009-11; EN 60950-1:2006 + A11:2009-03.

For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input must meet SELV

requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV.

The input to these units is to be provided with a slow-blow fuse with a maximum rating of 5 A in the positive input lead.

PARAMETER

DESCRIPTION

MIN

TYP

MAX

UNIT

Signal Low (Unit On)

Active Low

The remote on/off pin open, Unit on.

-0.2

-

0.6

V

Signal High (Unit Off)

2.0

-

Vin,max

V

Signal Low (Unit Off)

Active High

The remote on/off pin open, Unit on.

-0.2

-

0.6

V

Signal High (Unit On)

2.0

-

Vin,max

V

The SLDN-03D1Ax module can be turned ON and OFF either by using the ON/OFF pin or through the Power Management Bus

interface (Digital). The module can be configured in a number of ways through the Power Management Bus interface to react to the

two ON/OFF inputs:

•

Module ON/OFF can be controlled only through the analog interface (digital interface ON/OFF commands are ignored).

•

Module ON/OFF can be controlled only through the Power Management Bus interface (analog interface is ignored).

•

Module ON/OFF can be controlled by either the analog or digital interface.

The default state of the module (as shipped from the factory) is to be controlled by the analog interface only. If the digital interface is

to be enabled, or the module is to be controlled only through the digital interface, this change must be made through the Power

Management Bus. These changes can be made and written to non-volatile memory on the module so that it is remembered for

subsequent use.

The SLDN-03D1Ax modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are available. In the Positive

Logic On/Off option, (device code suffix “0” – see Ordering Information), the module turns ON during a logic High on the On/Off pin

and turns OFF during a logic Low. With the Negative Logic On/Off option, (device code suffix “L” – see Ordering Information), the

module turns OFF during logic High and ON during logic Low. The On/Off signal should be always referenced to ground. For either

On/Off logic option, leaving the On/Off pin disconnected will turn the module ON when input voltage is present.

For positive logic modules, the circuit configuration for using the On/Off pin is shown in Figure 39. When the external transistor Q2 is

in the OFF state, the internal transistor Q1 is turned ON, and the internal PWM #Enable signal is pulled low causing the module to be



For negative logic On/Off modules, the circuit configuration is shown in Fig. 40. The On/Off pin should be pulled high with an external

pull-up resistor (suggested value for the 3V to 14V input range is 20Kohms). When transistor Q2 is in the OFF state, the On/Off pin is

pulled high, transistor Q1 is turned ON and the module is OFF. To turn the module ON, Q2 is turned ON pulling the On/Off pin low,

turning transistor Q1 OFF resulting in the PWM Enable pin going high.