Data Sheet April 2008 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Features n n Wide input voltage range: 36 Vdc to 75 Vdc n Overcurrent protection n Output overvoltage protection n Input-to-output isolation: 1500 Vdc n The LW020 Single-Output-Series Power Modules use advanced, surface-mount technology and deliver high-quality, compact, dc-dc conversion at an economical price. n Distributed power architectures n Communication equipment n Computer equipment Options n Choice of remote on/off configuration n Case ground pin n Synchronization n n Short pins: 2.79 mm ± 0.25 mm (0.110 in. ± 0.010 in.) Short pins: 3.68 mm ± 0.25 mm (0.145 in. ± 0.010 in.) Operating case temperature range: –40 °C to +110 °C n Remote on/off n Output voltage adjustment: 90% to 110% of VO, nom n JQA Certified to EN60950 n Applications Low profile: 9.91 mm (0.390 in.) with 0.38 mm (0.015 in.) standoffs, 9.53 mm (0.375 in.) with standoffs recessed n n UL* 1950 Recognized, CSA† C22.2 No. 950-95 Certified, VDE‡ 0805 (EN60950, IEC950) Licensed CE mark meets 73/23/EEC and 93/68/EEC directives§ Within FCC Class A radiated limits Description The LW020 Single-Output-Series Power Modules are low-profile dc-dc converters that operate over an input voltage range of 36 Vdc to 75 Vdc and provide precisely regulated outputs. The outputs are isolated from the input, allowing versatile polarity configurations and grounding connections. Built-in filtering for both input and output minimizes the need for external filtering. The modules have a maximum power rating of 20 W at a typical full-load efficiency of up to 85%. * UL is a registered trademark of Underwriters Laboratories, Inc. † CSA is a registered trademark of Canadian Standards Association. ‡ VDE is a trademark of Verband Deutscher Elektrotechniker e.V. § This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should be followed. (The CE mark is placed on selected products.) LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet April 2008 Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the devices. These are absolute stress ratings only. Functional operation of the devices is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Symbol Min Max Unit VI VI, trans 0 0 80 100 Vdc V Operating Case Temperature (See Thermal Considerations section.) TC –40 110* °C Storage Temperature Tstg –40 120 °C I/O Isolation Voltage — — 1500 Vdc Input Voltage: Continuous Transient (100 ms) * Maximum case temperature varies based on power dissipation. See derating curve, Figure 16, for details. Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Table 1. Input Specifications Parameter Symbol Min Typ Max Unit VI 36 48 75 Vdc II, max — — 1.1 A Inrush Transient i 2t — — 0.1 A2s Input Reflected-ripple Current (50 Hz to 20 MHz; 12 µH source impedance, TC = 25 °C; see Figure 11 and Design Considerations section.) II — 3 — mAp-p Input Ripple Rejection (100 Hz—120 Hz) — — 60 — dB Operating Input Voltage Maximum Input Current (VI = 0 V to VI, max; IO = IO, max; see Figure 1.) 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 fusing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a normal-blow fuse with a maximum rating of 5 A (see Safety Considerations section). Based on the information provided in this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data for further information. 2 Lineage Power LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet April 2008 Electrical Specifications (continued) Table 2. Output Specifications Parameter Device Symbol Min Typ Max Unit Output Voltage Set Point (VI = 48 V; IO = IO, max; TC = 25 °C) LW020G LW020F LW020A LW020B LW020C VO, set VO, set VO, set VO, set VO, set 2.46 3.25 4.92 11.81 14.76 2.5 3.3 5.0 12.0 15.0 2.54 3.35 5.08 12.19 15.24 Vdc Vdc Vdc Vdc Vdc Output Voltage (Over all line, load, and temperature conditions until end of life; see Figure 13.) LW020G LW020F LW020A LW020B LW020C VO VO VO VO VO 2.4 3.20 4.85 11.64 14.55 — — — — — 2.6 3.40 5.15 12.36 15.45 Vdc Vdc Vdc Vdc Vdc All All All — — — — — — 0.01 0.05 0.5 0.1 0.2 1.0 %VO %VO %VO LW020A, F, G LW020B, C LW020A, F, G LW020B, C — — — — — — — — — — 20 50 20 50 100 150 mVrms mVrms mVp-p mVp-p LW020A, F, G LW020B LW020C IO IO IO 0.4 0.17 0.13 — — — 4.0 1.67 1.33 A A A All IO 103 — 150 %IO, max LW020C LW020B LW020A, F, G IO IO IO — — — 150 150 150 250 220 200 %IO, max %IO, max %IO, max LW020G LW020F LW020A LW020B LW020C η η η η η 71 74 77 82 82 75 77 81 85 85 — — — — — % % % % % All — — 256 — kHz All All — — — — 2 1.0 — — %VO, set ms All All — — — — 2 1.0 — — %VO, set ms Output Regulation: Line (VI = 36 V to 75 V) Load (IO = IO, min to IO, max) Temperature (TC = –40 °C to +100 °C) Output Ripple and Noise Voltage (See Figure 12.): RMS Peak-to-peak (5 Hz to 20 MHz) Output Current (At IO < IO, min, the modules may exceed output ripple specifications.) Output Current-limit Inception (VO = 90% x VO, set; see Figure 2.) Output Short-circuit Current (VO = 250 mV) Efficiency (VI, nom; IO = IO, max; TC = 25 °C; see Figures 3—7 and 13.) Switching Frequency Dynamic Response (ýIO/ýt = 1 A/10 µs, VI = VI, nom, TA = 25 °C): Load Change from IO = 50% to 75% of IO, max: Peak Deviation Settling Time (VO < 10% peak deviation) Load Change from IO = 50% to 25% of IO, max: Peak Deviation Settling Time (VO < 10% peak deviation) Lineage Power 3 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet April 2008 Electrical Specifications (continued) Table 3. Isolation Specifications Parameter Min Typ Max Unit Isolation Capacitance — 0.002 — µF Isolation Resistance 10 — — M¾ Min Typ Max Unit 54 (1.9) g (oz.) General Specifications Parameter Calculated MTBF (IO = 80% of IO, max; TC = 40 °C) 4,500,000 Weight — hours — Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions and Design Considerations for further information. Parameter Remote On/Off Signal Interface: (VI = 0 V to VI, max; open collector or equivalent compatible; signal referenced to VI(–) terminal. See Figure 14 and Feature Descriptions.): Negative Logic: Device Code Suffix “1”: Logic Low—Module On Logic High—Module Off Positive Logic: If Device Code Suffix “1” is not specified: Logic Low—Module Off Logic High—Module On Module Specifications: On/Off Current—Logic Low On/Off Voltage: Logic Low Logic High (Ion/off = 0) Open Collector Switch Specifications: Leakage Current During Logic High (Von/off = 10 V) Output Low Voltage During Logic Low (Ion/off = 1 mA) 4 Device Symbol Min Typ Max Unit All Ion/off — — 1.0 mA All All Von/off Von/off –0.7 — — — 1.2 10 V V All Ion/off — — 50 µA All Von/off — — 1.2 V Lineage Power Data Sheet April 2008 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Feature Specifications (continued) Parameter Turn-on Delay and Rise Times (at 80% of IO, max; TA = 25 °C): Case 1: On/Off Input Is Set for Unit On and then Input Power Is Applied (delay from point at which VI = 48 V until VO = 10% of VO, nom). Case 2: 48 V Input Is Applied for at Least One Second, and then the On/Off Input Is Set to Turn the Module On (delay from point at which on/off input is toggled until VO = 10% of VO, nom). Output Voltage Rise Time (time for VO to rise from 10% of VO, nom to 90% of VO, nom) Output Voltage Overshoot (at 80% of IO, max; TA = 25 °C) Output Voltage Set-point Adjustment Range Output Overvoltage Protection (clamp) Lineage Power Device Symbol Min Typ Max Unit All Tdelay — 27 50 ms All Tdelay — 2 10 ms All Trise — 1.5 3.0 ms All — — — 5 % LW020B All others LW020G LW020F LW020A LW020B LW020C — — 83 90 2.9 3.9 5.6 13.2 16.5 — — — — — — — 110 110 3.8 5.0 7.0 16.5 20.0 %VO, nom %VO, nom V V V V V VO, clamp VO, clamp VO, clamp VO, clamp VO, clamp 5 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet April 2008 Characteristics Curves 76 74 EFFICIENCY, η (%) 1.0 INPUT CURRENT, II (A) 0.9 0.8 PO = 20 W 0.7 PO = 10 W PO = 2 W 0.6 0.5 72 70 68 66 VI = 36 V VI = 48 V VI = 75 V 64 0.4 62 0.3 60 0.4 0.2 0.9 1.4 1.9 2.4 2.9 3.4 3.9 0.1 OUTPUT CURRENT, IO (A) 0.0 0 10 20 30 40 50 60 70 8-1483(C).a 80 INPUT VOLTAGE, V I (V) 8-1481(C).a Figure 3. LW020G Typical Converter Efficiency vs. Output Current, TA = 25 °C Figure 1. LW020 Typical Input Characteristics, TA = 25 °C 80 100% VO, nom 78 EFFICIENCY, η (%) NORMALIZED OUTPUT VOLTAGE, VO (V) 79 80% VO, nom 60% VO, nom VI = 75 VI = 54 VI = 36 40% VO, nom 77 76 75 74 VI = 75 73 VI = 54 72 VI = 36 71 20% VO, nom 70 0.0 0 0 50% IO, max 100% IO, max 150% IO, max 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 OUTPUT CURRENT, IO (A) 8-1483(C) NORMALIZED OUTPUT CURRENT, IO (A) 8-1258(C).a Figure 2. LW020A, B, C, F, and G Typical Output Characteristics, TA = 25 °C 6 Figure 4. LW020F Typical Converter Efficiency vs. Output Current, TA = 25 °C Lineage Power LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet April 2008 Characteristics Curves (continued) 88 86 82 81 EFFICIENCY, η (%) 84 EFFICIENCY, η (%) 80 79 78 77 VI = 36 VI = 54 VI = 75 76 75 82 80 78 VI = 75 76 VI = 54 74 VI = 36 72 70 0.0 74 0.2 0.4 0.6 0.8 1.0 1.2 73 OUTPUT CURRENT, IO (A) 72 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 8-1485(C) 4.0 OUTPUT CURRENT, IO (A) 8-1260(C).a Figure 7. LW020C Typical Converter Efficiency vs. Output Current, TA = 25 °C NORMALIZED OUTPUT VOLTAGE, V O (V) Figure 5. LW020A Typical Converter Efficiency vs. Output Current 86 82 80 100% VO, nom 99% VO, nom 78 VI = 75 76 VI = 54 74 VI = 36 72 70 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 OUTPUT CURRENT, IO (A) NORMALIZED OUTPUT CURRENT, IO (A) EFFICIENCY, η (%) 84 75% IO, max 50% IO, max 8-1484(C) Figure 6. LW020B Typical Converter Efficiency vs. Output Current, TA = 25 °C TIME, t (100 µs/div) 8-1262(C).a Figure 8. LW020A, B, C, F, and G Typical Output Voltage for a Step Load Change from 50% to 75% Lineage Power 7 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Test Configurations TO OSCILLOSCOPE LTEST 101% VO, nom CURRENT PROBE VI(+) 12 µH 100% VO, nom CS 220 µF IMPEDANCE < 0.1 Ω @ 20 ˚C, 100 kHz BATTERY 33 µF VI(-) 8-203(C) Note: Input reflected-ripple current is measured with a simulated source impedance of 12 µH. Capacitor Cs offsets possible battery impedance. Current is measured at the input of the module. 50% IO, max 25% IO, max (A) NORMALIZED OUTPUT CURRENT, IO NORMALIZED OUTPUT VOLTAGE, VO (V) Characteristics Curves (continued) Data Sheet April 2008 Figure 11. Input Reflected-Ripple Test Setup TIME, t (100 µs/div) 8-1261(C).b Figure 9. LW020A, B, C, F, and G Typical Output Voltage for a Step Load Change from 50% to 25% COPPER STRIP V O (+) 0.1 µF RESISTIVE LOAD SCOPE NORMALIZED OUTPUT VOLTAGE, VO (1 V/div) REMOTE ON/OFF, Von/off (V) (2 V/div) V O (-) 8-513(C) Note: Use a 0.1 µF ceramic capacitor. Scope measurement should be made using a BNC socket. Position the load between 50 mm and 75 mm (2 in. and 3 in.) from the module. 5V Figure 12. Peak-to-Peak Output Noise Measurement Test Setup 0 100% VO, nom 50% VO, nom CONTACT AND DISTRIBUTION LOSSES V I (+) V O (+) IO II 0 LOAD SUPPLY TIME, t (1 ms/div) V I (-) 8-1263(C).b V O (-) CONTACT RESISTANCE 8-204(C) Figure 10. LW020A, B, C, F, and G Typical Output Voltage Start-Up when Signal Applied to Remote On/Off Note: All measurements are taken at the module terminals. When socketing, place Kelvin connections at module terminals to avoid measurement errors due to socket contact resistance. [ V O (+) – V O (–) ]I O η = ⎛ ------------------------------------------------⎞ × 100 ⎝ [ V I (+) – V I (–) ]I I ⎠ % Figure 13. Output Voltage and Efficiency Measurement Test Setup 8 Lineage Power Data Sheet April 2008 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Design Considerations The power module has extra-low voltage (ELV) outputs when all inputs are ELV. Grounding Considerations The input to these units is to be provided with a maximum 5 A normal-blow fuse in the ungrounded lead. For standard units, the case is connected internally to VI(+). For units with the case ground pin option, the case is not connected internally allowing the user flexibility in grounding. Feature Descriptions Overcurrent Protection Input Source Impedance The power module should be connected to a low acimpedance input source. Highly inductive source impedances can affect the stability of the power module. For the test configuration in Figure 11, a 33 µF electrolytic capacitor (ESR < 0.7 ¾ at 100 kHz) mounted close to the power module helps ensure stability of the unit. For other highly inductive source impedances, consult the factory for further application guidelines. Safety Considerations For safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standard, i.e., UL 1950, CSA C22.2 No. 950-95, and VDE 0805 (EN60950, IEC950). If the input source is non-SELV (ELV or a hazardous voltage greater than 60 Vdc and less than or equal to 75 Vdc), for the module's output to be considered meeting the requirements of safety extra-low voltage (SELV), all of the following must be true: n n n n The input source is to be provided with reinforced insulation from any other hazardous voltages, including the ac mains. One VI pin and one VO pin are to be grounded or both the input and output pins are to be kept floating. The input pins of the module are not operator accessible. Another SELV reliability test is conducted on the whole system, as required by the safety agencies, on the combination of supply source and the subject module to verify that under a single fault, hazardous voltages do not appear at the module's output. Note: Do not ground either of the input pins of the module without grounding one of the output pins. This may allow a non-SELV voltage to appear between the output pins and ground. Lineage Power To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting circuitry and can endure current limiting for an unlimited duration. At the point of current-limit inception, the unit shifts from voltage control to current control. If the output voltage is pulled very low during a severe fault, the current-limit circuit can exhibit either foldback or tailout characteristics (output-current decrease or increase). The unit operates normally once the output current is brought back into its specified range. Output Overvoltage Protection The output overvoltage clamp consists of control circuitry, independent of the primary regulation loop, that monitors the voltage on the output terminals. The control loop of the protection circuit has a higher voltage set point than the primary loop (see Feature Specifications table). In a fault condition, the overvoltage clamp ensures that the output voltage does not exceed VO, clamp, max. This provides a redundant voltage-control that reduces the risk of output overvoltage. Remote On/Off Two remote on/off options are available. Positive logic remote on/off turns the module on during a logic-high voltage on the REMOTE ON/OFF pin, and off during a logic low. Negative logic remote on/off, device code suffix “1,” turns the module off during a logic high and on during a logic low. To turn the power module on and off, the user must supply a switch to control the voltage between the on/off terminal and the VI(–) terminal (Von/off). The switch can be an open collector or equivalent (see Figure 14). A logic low is Von/off = –0.7 V to 1.2 V. The maximum Ion/off during a logic low is 1 mA. The switch should maintain a logic-low voltage while sinking 1 mA. During a logic high, the maximum Von/off generated by the power module is 6 V. The maximum allowable leakage current of the switch at Von/off = 6 V is 50 µA. 9 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet April 2008 Feature Descriptions (continued) Remote On/Off (continued) The module has internal capacitance to reduce noise at the ON/OFF pin. Additional capacitance is not generally needed and may degrade the start-up characteristics of the module. VI(+) VI(-) Von/off + Ion/off REMOTE ON/OFF 8-758(C).a Figure 14. Remote On/Off Implementation Output Voltage Adjustment Output voltage trim allows the user to increase or decrease the output voltage set point of a module. This is accomplished by connecting an external resistor between the TRIM pin and either the VO(+) or VO(–) pins. With an external resistor between the TRIM and VO(+) pins (Radj-down), the output voltage set point (VO, adj) decreases. With an external resistor between the TRIM pin and VO(–) pin (Radj-up), VO, adj increases. The following equations determine the required external resistor value to obtain an output voltage change of ý%: c [ d • ( 1 – Δ% ) – 1 ] R adj-down = ---------------------------------------------------- – b kΩ Δ% a R adj-up = ------------------- – b kΩ d • Δ% Device a b c d –5% VO Radj-down +5% VO Radj-up LW020G LW020F LW020A LW020B LW020C 14.0 14.0 4.02 15.40 21.50 51.10 51.10 16.90 15.40 16.90 7.02 5.19 2.01 1.58 1.76 2.0 2.70 2.0 9.80 12.24 75.3 k¾ 110.9 k¾ 19.3 k¾ 246.5 k¾ 356.3 k¾ 88.9 k¾ 52.8 k¾ 23.3 k¾ 16.0 k¾ 18.2 k¾ The adjusted output voltage cannot exceed 110% of the nominal output voltage between the VO(+) and VO(–) terminal. The modules have a fixed current-limit set point. Therefore, as the output voltage is adjusted down, the available output power is reduced. In addition, the minimum output current is a function of the output voltage. As the output voltage is adjusted down, the minimum required output current can increase. 10 Lineage Power LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet April 2008 Feature Descriptions (continued) power of the module should not exceed the rated power for the module as listed in the Ordering Information table. Synchronization (Optional) The unit is capable of external synchronization from an independent time base with a switching rate of 256 kHz. The amplitude of the synchronizing pulse train is TTL compatible and the duty cycle ranges between 40% and 60%. Synchronization is referenced to VI(+). Thermal Considerations Introduction The LW020 Single-Output-Series power module operates in a variety of thermal environments; however, sufficient cooling should be provided to help ensure reliable operation of the unit. Heat-dissipating components inside the unit are thermally coupled to the case. Heat is removed by conduction, convection, and radiation to the surrounding environment. Proper cooling can be verified by measuring the case temperature. Peak case temperature (TC) occurs at the position indicated in Figure 15. Heat Transfer Increasing airflow over the module enhances the heat transfer via convection. Figure 16 shows the maximum power that can be dissipated by the module without exceeding the maximum case temperature versus local ambient temperature (TA) for natural convection through 3.0 ms–1 (600 ft./min.). Systems in which these power modules may be used typically generate natural convection airflow rates of 0.3 ms–1 (60 ft./min.) due to other heat-dissipating components in the system. Therefore, the natural convection condition represents airflow rates of up to 0.3 ms–1 (60 ft./min.). Use of Figure 16 is shown in the following example. Example What is the minimum airflow necessary for a LW020A operating at VI = 48 V, an output current of 3.6 A, and a maximum ambient temperature of 85 °C? Solution: Given: VI = 48 V, IO = 3.6 A, TA = 85 °C Determine PD (Figure 18): PD = 4.5 W Determine airflow (Figure 16): v = 1.0 ms–1 (200 ft./min.) 8-1265(C) Note: Dimensions are in millimeters and (inches). Pin locations are for reference only. POWER DISSIPATION, PD (W) 7 MAX CASE TEMPERATURE 6 5 4 NATURAL CONVECTION 1.0 ms-1 (200 ft./min.) 2.0 ms-1 (400 ft./min.) 3.0 ms-1 (600 ft./min.) 3 2 1 0 40 Figure 15. Case Temperature Measurement Location 50 60 70 80 90 100 110 120 MAX AMBIENT TEMPERATURE, TA (˚C) 8-1264(C).a Note that the view in Figure 15 is of the metal surface of the module—the pin locations shown are for reference. The temperature at this location should not exceed the maximum case temperature indicated in the derating curve shown in Figure 16. The output Lineage Power Note: Conversion factor for linear feet per minute to meters per second: 200 ft./min. = 1 ms–1. Figure 16. Forced Convection Power Derating; Either Orientation 11 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet April 2008 Thermal Considerations (continued) 6 POWER DISSIPATION, PD (W) Heat Transfer (continued) POWER DISSIPATION, PD (W) 4.5 4.0 3.5 3.0 2.5 VI = 36 V VI = 48 V VI = 75 V 1.0 0.5 0.4 0.9 1.4 1.9 2.4 2.9 4 VI = 75 3 2 VI = 54 VI = 36 1 0 0.0 2.0 1.5 5 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 OUTPUT CURRENT, IO (A) 8-1479(C) 3.4 3.9 Figure 19. LW020B Power Dissipation vs. Output Current, TA = 25 °C OUTPUT CURRENT, IO (A) 8-1478(C).a POWER DISSIPATION, PD (W) 6 5 4 4.5 POWER DISSIPATION, PD (W) Figure 17. LW020F and G Power Dissipation vs. Output Current, TA = 25 °C 4.0 3.5 VI = 75 3.0 2.5 2.0 1.5 VI = 36 0.5 0.0 0.0 3 VI = 54 1.0 0.2 0.4 0.6 0.8 1.0 1.2 OUTPUT CURRENT, IO (A) 2 VI = 75 VI = 48 VI = 36 1 8-1477(C) 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Figure 20. LW020C Power Dissipation vs. Output Current, TA = 25 °C OUTPUT CURRENT, IO (A) 8-1275(C).a Figure 18. LW020A Power Dissipation vs. Output Current 12 Lineage Power LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet April 2008 Thermal Measurements The derating curves in Figure 16 were derived from measurements obtained in an experimental apparatus shown in Figure 21. Note that the module and the printed-wiring board (PWB) that it is mounted on are vertically oriented. The passage has a rectangular cross section. FACING PWB PWB MODULE AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE AIRFLOW 76 (3.0) 13 (0.5) Note: Dimensions are in millimeters and (inches). 8-1126(C).d Figure 21. Experimental Test Setup Layout Considerations Copper paths must not be routed beneath the power module standoffs. Lineage Power 13 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet April 2008 Outline Diagram Dimensions are in millimeters and (inches). Copper paths must not be routed beneath the power module standoffs. Tolerances: x.x ± 0.5 mm (0.02 in.), x.xx ± 0.25 mm (0.010 in.). Pin-to-pin tolerances are not cumulative. Note: For standard modules, VI(+) is internally connected to the case. Top View Pin Function 1 REMOTE ON/OFF 2 No Connection (sync feature optional) 3 VI(–) 4 VI(+) 5 CASE Pin (pin optional) 6 TRIM 7 VO(–) 8 VO(+) Side View Bottom View 8-1198(C).g 14 Lineage Power LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet April 2008 Recommended Hole Pattern Component-side footprint. Dimensions are in millimeters and (inches). 2.5 (0.10) 12.7 (0.50) 20.32 (0.800) 15.24 (0.600) 50.8 (2.00) 45.72 (1.800) 12.4 (0.49) 5.08 (0.200) 2.54 (0.100) 7.62 (0.300) 10.16 (0.400) 50.8 (2.00) 17.78 (0.700) 37.8 (1.49) 3.43 (0.135) 38.86 (1.530) CASE OUTLINE DRILL HOLE OF APPROX. 2.54 (0.100) DIAMETER TO RECESS STANDOFFS IF LOWER HEIGHT IS NEEDED 8-1198(C).g Ordering Information Table 4. Device Codes Input Voltage Output Voltage Output Power Device Code Comcode 48 V 2.5 V 10 W LW020G 108258195 48 V 3.3 V 13.2 W LW020F 107640807 48 V 5V 20 W LW020A 107314304 48 V 12 V 20 W LW020B 107681033 48 V 15 V 20 W LW020C 107640799 Optional features may be ordered using the device code suffixes shown. To order more than one option, list suffixes in numerically descending order. Please contact your Lineage Power Account Manager or Field Application Engineer for pricing and availability. Table 5. Device Options Option Short pins: 2.79 mm ± 0.25 mm (0.110 in. ± 0.010 in.) Case ground pin Short pins: 3.68 mm ± 0.25 mm (0.145 in. ± 0.010 in.) Synchronization Negative remote on/off logic Lineage Power Device Code Suffix 8 7 6 3 1 15 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet April 2008 A sia-Pacific Head qu art ers T el: +65 6 41 6 4283 World W ide Headq u arters Lin eag e Po wer Co rp oratio n 30 00 Sk yline D riv e, Mesquite, T X 75149, U SA +1-800-526-7819 (Outs id e U .S.A .: +1- 97 2-2 84 -2626) www.line ag ep ower.co m e-m ail: tech sup port1@ lin ea gep ower.co m Eu ro pe, M id dle-East an d Afric a He ad qu arters T el: +49 8 9 6089 286 Ind ia Head qu arters T el: +91 8 0 28411633 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 s uc h pr oduct(s ) or information. © 2008 Lineage Power Corpor ation, (Mesquite, Texas ) All International Rights Res er ved. April 2008 DS00-059EPS (Replaces DS00-058EPS)