APTS020A0X3-SRZ datasheet(14/26 Pages) LINEAGEPOWER

Part #	APTS020A0X3-SRZ

Description	4.5 - 14Vdc input; 0.69Vdc to 5.5Vdc output; 20A output current

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Manufacturer	LINEAGEPOWER [Lineage Power Corporation]

Direct Link	http://www.lineagepower.com

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14 / 26 page

Data Sheet

July 24, 2009

12V TLynxTM: Non-isolated DC-DC Power Modules

4.5 – 14Vdc input; 0.69Vdc to 5.5Vdc output; 20A output current

LINEAGE POWER

14

external capacitance values at various Vo and for a full

load current of 20A. For stable operation of the

module, limit the capacitance to less than the

maximum output capacitance as specified in the

electrical specification table. Optimal performance of

the module can be achieved by using the Tunable

Loop

TM feature described later in this data sheet.

0

10

20

30

40

0.5

1.5

2.5

3.5

4.5

5.5

Output Voltage (Volts)

1x10uF External Cap

1x47uF External Cap

2x47uF External Cap

4x47uF External Cap

Figure 41. Output ripple voltage for various output

voltages with external 1x10 µF, 1x47 µF, 2x47 µF or

4x47 µF ceramic capacitors at the output (20A

load). Input voltage is 12V.

Safety Considerations

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, CSA C22.2 No. 60950-1-

03, and VDE 0850:2001-12 (EN60950-1) Licensed.

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 fast-

acting fuse with a maximum rating of 20 A in the

positive input lead

.

Feature Descriptions

Remote Enable

The 12V TLynx

TM 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 “4” – 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, (no device code suffix, see Ordering

Information), 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 Figure 42. When the

external transistor Q1 is in the OFF state, the internal

PWM Enable signal is pulled high through an internal

24.9k

Ω 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 Rpullup is 20k

Ω.

23K

I

ON/OFF

24.9K

Q1

GND

ON/OFF

VIN+

_

+

PWM Enable

V

ON/OFF

MODULE

Rpullup

22K

Q3

22K

12.1K

Q2

22K

Figure 42. Circuit configuration for using positive

On/Off logic.

For negative logic On/Off modules, the circuit

configuration is shown in Fig. 43. 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 Q1 is in the OFF state, the

On/Off pin is pulled high, internal transistor Q2 is

turned ON and the module is OFF. To turn the module

ON, Q1 is turned ON pulling the On/Off pin low, turning

transistor Q2 OFF resulting in the PWM Enable pin

going high and the module turning ON.

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