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LOS4301-2RLD Datasheet(PDF) 6 Page - Power-One |
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LOS4301-2RLD Datasheet(HTML) 6 Page - Power-One |
6 / 12 page SEP 09, 2005 revised to JUL 17, 2006 Page 6 of 12 www.power-one.com LOS, LOR, LOK4000 Series Data Sheet DIN-Rail Mountable AC-DC (DC-DC) Converters 2.10 2.15 2.20 2.25 2.30 2.35 2.40 2.45 Cell voltage [V] –20 –10 0 10 20 30 40 50 °C 06123a VC = 2.27 V, –3 mV/K VC = 2.27 V, –3.5 mV/K VC = 2.23 V, –3 mV/K VC = 2.23 V, –3.5 mV/K Vo nom Vo max Table 4: Output Voltage OK signal Conditions LOK4001-2RLD LOK4140-2RLD LOK4240-2RLD LOK4740-2RLD Unit min max min max min max min max Vo t setting 4.4 4.8 10.5 11.5 21 23 42 46 V VD Vo - Vo t min 60 60 60 60 Vo > Vo t max 0.6 0.6 0.6 0.6 I D < 50 mA Auxiliary Functions Adjustable Output Voltage (R input) As a standard feature, the LOK units offer adjustable output voltage by using the control input R. If the R pin is left open- circuit, the output voltage is set to Vo nom. (see: Output data) The R input is referenced to the secondary side of the converter. Adjustment of the output voltage is possible by means of either an external resistor or a voltage source. a) Adjustment by means of an external resistor Rext1: Depending upon the value of the required output voltage, the resistor shall be connected either: Between the R terminal and Vo– to achieve an output voltage adjustment range of approximately Vo = 90 - 100 % Vo nom.(LOK4301, 4601 and 4801 types) Vo Rext1 ≈ 4 kΩ • ––––––––– Vo nom – Vo or: Between the R terminal and Vo+ to achieve an output voltage range of approximately Vo = 100 - 110% Vo nom for rectifier versions and 100 - 125% Vo nom for battery chargers. (Vo – 2.5 V) Rext2 ≈ 4 kΩ • ––––––––––––––––––– 2.5 V • (Vo/Vo nom – 1) R Vo+ Vo- + V ext - 4 k Ω Vref = 2.5 V control circuit L N R ext1 R ext 2 06029 b) Adjustment by means of an external voltage Vext between Vo– and R terminal to achieve an output voltage adjustment range of approx. 90 - 110% Vo nom (LOK 4301, 4601 and 4801 types), 93 - 117% Vo nom for battery chargers. Vo • 2.5 V Vext ≈ ––––––––– Vo nom Attempting to adjust the output below this range will cause the converter to shut down (hiccup mode). Note: Applying an external control voltage >3 V may damage the converter. Fig. 6 Voltage setting by a temperature sensor, wiring diagram + – Battery Vo+ R Vo– Temperature sensor Sensor cable Sensor wires + green brown white Fuse – Fig. 7 Float charge voltage for defined temperature coefficients. Output Voltage OK (D Output) The D-output is referenced to Vo– and monitors the output voltage Vo. If Vo drops below Vo t, the D-output will be disabled (open-collector circuit). The circuitry works independently of the input voltage and can therefore be used as battery-low indicator. Battery Charging/Temperature Sensor The LOK 4140/4240/4740 are designed to charge lead-acid batteries. For optimum battery charging and extended life time of the battery an external temperature sensor may be connected to the R-input. The sensor should be mounted as close as possible to one of the poles of the battery. Depending upon the cell voltage and the temperature coefficient of the battery, different temperature sensors are available. For more information please see: Temperature Sensors (Accessory Products on the Web Site) or contact Power-One. If no sensor is used, the float charge voltage should be adjusted with a suitable resistor connected to the R input (see: Adjustable Output Voltage). Fig. 5 Output voltage control by means of the R-input |
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