LXN2880-6G Просмотр технического описания (PDF) - Power-One Inc.

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LXN2880-6G

375, 500 Watt AC-DC and DC-DC DIN-Rail Converters

Power-One Inc. 

X Series Data Sheet

®

375, 500 Watt AC-DC and DC-DC DIN-Rail Converters

Io / Io nom

1.6

05194b

1.4

1.2

1.0

0.8

0.6

- 0.5

0

0.5

1

1.5

2

2.5 s

Fig. 8

Short term peak power characteristic: overcurrent versus

time (typical values).

allows for connecting a battery-specific temperature sensor,

which provides temperature-controlled adjust of the trickle

charge voltage. This optimizes charging as well as battery life

time. Depending upon the cell voltage and the temperature

coefficient of the battery, different sensor types are available;

see Accessories.

Note: Parallel operation is not possible, if the temperature sensor

is connected to the paralleled outputs Vo+, as the sensor

eliminates the output voltage droop.

However, it is possible to insert bleeding resistors in the Vo+

output lines of each converter in order to create a droop of

approx. 0.6 V @ Io nom for 24 V outputs (1.2 V @ Io nom for 48 V

outputs), but this creates considerable power losses.

Thermal Considerations

The thermal conditions are influenced by input voltage, output

current, airflow, and temperature of surrounding components.

TA max is therefore, contrary to TC max, an indicative value only.

Caution: The installer must ensure that under all operating

conditions TC remains within the limits stated in the table

Temperature specifications.

Note: Sufficient forced cooling allows TA to be higher than TA max

provided that TC max is not exceeded. It is recommended that

continuous operation under worst case conditions of the

following 3 parameters be avoided: Minimum input voltage,

maximum output power, and maximum temperature.

Battery Charging and Temperature Sensor

The battery charger models exhibit the option M1 and have

been designed to charge lead-acid batteries. The R-input

Vo+

Input

Power

supply

Vo–

R

03099d

Load

ϑ

+

Temperature sensor

Battery

Fig. 10

Schematic circuit diagram of a system with battery backup

and temperature-controlled charging.

Cell voltage [V]

2.45

2.40

06139b

2.35

2.30

2.25

2.20

2.15 Vo safe

2.10

–20 –10

0

10

VC = 2.27 V, –3 mV/K

VC = 2.23 V, –3 mV/K

20 30 40 50 °C

VC = 2.27 V, –3.5 mV/K

VC = 2.23 V, –3.5 mV/K

Fig. 9

Trickle charge voltage versus temperature for different

temperature coefficients (Vo safe with disconnected sensor)

BCD20021-G Rev AC1, 13-May-2013

Page 11 of 21

www.power-one.com

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