QW050F1

... Description The QW050F1 and QW075F1 Power Modules are dc-dc converters that operate over an input voltage range of 36 Vdc to 75 Vdc and provide a precisely regulated dc output. The outputs are fully isolated from the inputs, allowing versatile polarity configurations and grounding connections. The modules have maximum power rat- ings from typical full-load efficiency of 81% ...

... Maximum Input Current ( see Figures 1 and max 2): QW050F1 QW075F1 Inrush Transient Input Reflected-ripple Current, Peak-to-peak ( MHz, 12 µH source impedance; see Figure 13.) Input Ripple Rejection (120 Hz) Fusing Considerations CAUTION: This power module is not internally fused. An input line fuse must always be used. This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone operation to an integrated part of a sophisticated power architecture. To preserve maximum flexibility, internal fus- ing is not included ...

... All — All — All — All — All — All — QW050F1 QW075F1 QW050F1 I O, cli QW075F1 I O, cli = 70 °C) QW050F1 C QW075F1 All — All = 25 °C; tested : O, max — — max — — Min Typ Max 3.25 3.3 3.35 3.20 — ...

... Converters Vdc Input, 3.3 Vdc Output General Specifications Parameter Calculated MTBF ( max QW050F1 QW075F1 Weight Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter ...

... The following figures provide typical characteristics for the power modules. The figures are identical for both on/off configurations. 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 INPUT VOLTAGE, V Figure 1. Typical QW050F1 Input Characteristics at Room Temperature 2.5 2.0 1.5 1.0 0.5 0 INPUT VOLTAGE, V Figure 2. Typical QW075F1 Input Characteristics at Room Temperature ...

... Room Temperature and 10 A Output 2.5 A Note: Tested with a 1000 µF aluminum and a 1.0 µF ceramic capaci- tor across the load. 8-2070 (C) Figure 7. Typical QW050F1 Transient Response to Step Decrease in Load from 50 Room Temperature and O, max 54 Vdc Input (Waveform Averaged to Eliminate Ripple Component.) 7 ...

... Eliminate Ripple Component.) Lineage Power Note: Tested with a 1000 µF aluminum and a 1.0 µF ceramic capaci- tor across the load. 8-2964 (F) Figure 11. QW050F1 Typical Start-Up from Remote On/Off Note: Tested with a 1000 µF aluminum and a 1.0 µF ceramic capaci- tor across the load. ...

... The power module has extra-low voltage (ELV) outputs when all inputs are ELV. The input to these units provided with a maxi- % mum 3 A normal-blow fuse in the ungrounded lead. April 2008 pin and one V pin are to be grounded Lineage Power ...

... V. The maximum allowable leakage current of the switch at V on/off If not using the remote on/off feature, short the ON/OFF pin to V (–). I Lineage Power I V Figure 16. Remote On/Off Implementation Remote Sense Remote sense minimizes the effects of distribution losses by regulating the voltage at the remote-sense connections ...

... Figure 18. Circuit Configuration to Decrease 1M 100k 10k 510 ⎞ kΩ --------- - 1k – 10.2 ⎠ Δ% (–) terminals O Figure 19. Resistor Selection for Decreased April 2008 (+) V (+) O SENSE(+) TRIM R adj-down (–) SENSE(–) V (–) O Output Voltage CHANGE IN OUTPUT VOLTAGE (Δ %) Output Voltage Lineage Power R LOAD 8-748 (C).b 40 8-2579 (C) ...

... The overvoltage latch is reset by either cycling the input power for 1.0 second or by tog- gling the on/off signal for 1.0 second. Lineage Power Overtemperature Protection These modules feature an overtemperature protection circuit to safeguard against thermal damage. The cir- cuit shuts down and latches off the module when the maximum case temperature is exceeded ...

... The use of Figure 25 is shown in the following example. Example What is the minimum airflow necessary for a QW050F1 operating output current and a I maximum ambient temperature of 40 °C? ...

... Figures 26 and 27. Longitudinal orientation is defined as the long axis of the module that is parallel to the airflow direction, whereas in the transverse orientation, the long axis is perpendicular to the airflow. These curves were obtained by experimental testing of heat sinks, which are offered in the product catalog. Lineage Power (continued ...

... IN. HEAT SINK NO HEAT SINK LOCAL AMBIENT TEMPERATURE, T (˚C) A 1.0 m/s (200 lfm); Transverse Orientation 1 IN. HEAT SINK 1/2 IN. HEAT SINK 1/4 IN. HEAT SINK NO HEAT SINK LOCAL AMBIENT TEMPERATURE, T (˚C) A 1.0 m/s (200 lfm); Longitudinal Orientation Lineage Power 90 100 8-2382 (C) 90 100 8-2383 (C) ...

... Use Figure 26 to determine air velocity for the 1/2 inch heat sink. The minimum airflow necessary for the QW050F1 module is 0.4 m/s (70 ft./min.). Note: Pending improvement will lower the power dissi- pation and reduce the airflow needed. Lineage Power ...

... MIN, 2 PLACES 1.57 (0.062) DIA SOLDER-PLATED BRASS, 2 PLACES MOUNTING INSERTS 12.7 (0.50 0.5 THROUGH, 4 PLACES 3.81 11.43 (0.150) (0.450) V (–) O 7.62 – SENSE (0.300) 15.24 TRIM (0.600) + SENSE V (+) O Lineage Power April 2008 8-1769 (F).b ...

... V Optional features can be ordered using the suffixes shown in Table 5. The suffixes follow the last letter of the device code and are placed in descending order. For example, the device codes for a QW050F1 module with the following options are shown below: Auto-restart after overcurrent shutdown Table 5 ...

... Figure 33. Longitudinal Heat Sink 18 18 1/4 IN. 1.450 ± 0.015 (36.83 ± 0.38) 1/2 IN. 1 IN. 8-2473 (F) April 2008 Comcode 848060992 848061008 848061016 848061024 848061032 848061040 1/4 IN. 1/2 IN. 1 IN. 1.850 ± 0.005 (47.24 ± 0.13) Figure 34. Transverse Heat Sink Lineage Power 8-2472 (F) ...

... April 2008 dc-dc Converters Vdc Input, 3.3 Vdc Output Notes Lineage Power 19 ...

... Lineage Power reserves the right to make changes to the produc t(s) or information contained herein without notice. No liability is ass umed as a res ult of their use or applic ation. No rights under any patent acc ompany the sale of any oduct information. ...