SLIN-03E1A0 BEL [Bel Fuse Inc.], SLIN-03E1A0 Datasheet - Page 14

• Manufacturer Part Number: SLIN-03E1A0
• Description: NON-ISOLATED DC/DC CONVERTERS 4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
• Manufacturer: BEL [Bel Fuse Inc.]

Remote On/Off
The SLIN-03E1Ax 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, 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, the module turns OFF during logic High
and ON during logic Low. The On/Off signal is 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 below figure. When the
external transistor Q1 is in the OFF state, the internal PWM Enable signal is pulled high through an internal
1.5MΩ resistor and the external pullup resistor and the module is ON. When transistor Q1 is turned ON, the
On/Off pin is pulled low and the module is OFF. A suggested value for R
For negative logic On/Off modules, the circuit configuration is shown below. The On/Off pin should be pulled
high with an external pull-up resistor (suggested value for the 4.5V 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.
October 8, 2009
Signal Low (Unit On)
Signal High (Unit Off)
Signal Low (Unit Off)
Signal High (Unit On)
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Parameter
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel [phone] • Fax [phone] •
Active Low
Active High
Circuit configuration for using negative On/Off logic
Circuit configuration for using positive On/Off logic
ON/OFF
VIN+
ON/OFF
GND
VIN+
GND
Min
-0.2
-0.3
3.5
3.5
Rpullup1
V
Q2
I
ON/OFF
Rpullup
V
Q1
ON/OFF
I
ON/OFF
+
_
ON/OFF
+
_
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
Typ
-
-
-
-
MODULE
22K
MODULE
22K
Vin,max
Vin,max
Max
0.8
0.3
20K
Q1
PWM Enable
PWM Enable
1.5MEG
Unit
V
V
V
V
pullup
1.5MEG
The remote on/off pin open, Unit off.
The remote on/off pin open, Unit on.
is 20kΩ.
Notes
www.belfuse.com
14