Data Sheet August 1998 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Features Low profile: 9.91 mm (0.390 in.) with 0.38 mm (15 mil) standoffs, 9.53 mm (0.375 in.) with standoffs recessed Wide input voltage range: 36 Vdc to 75 Vdc Overcurrent protection Output overvoltage protection Input-to-output isolation: 1500 Vdc Operating case temperature range: -40 C to +110 C Remote on/off The LW020 Single-Output-Series Power Modules use advanced, surface-mount technology and deliver high-quality, compact, dc-dc conversion at an economical price. Output voltage adjustment: 90% to 110% of VO, nom UL* 1950 Recognized, CSA C22.2 No. 950-95 Certified, EN60950, IEC950, and VDE0805 Licensed (except LW020G) Options CE mark meets 73/23/EEC and 93/68/EEC directives (except LW020G) Within FCC and VDE Class A radiated limits Choice of remote on/off configuration Case ground pin Synchronization Short pins: 2.79 mm 0.25 mm (0.110 in. 0.010 in.) Applications Distributed Power Architectures Telecommunications 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. 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 August 1998 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 Input Voltage: Continuous Transient (100 ms) Operating Case Temperature (See Derating Curve, Figure 16.) Storage Temperature I/O Isolation Voltage Symbol Min Max Unit VI VI, trans TC 0 0 -40 80 100 110* Vdc V C Tstg -- -40 -- 120 1500 C Vdc * 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 Operating Input Voltage Maximum Input Current (VI = 0 V to VI, max; IO = IO, max; see Figure 1.) Symbol VI II, max Min 36 -- Typ 48 -- Max 75 1.1 Unit Vdc A Inrush Transient Input Reflected-ripple Current (50 Hz to 20 MHz; 12 H source impedance, TC = 25 C; see Figure 11.) Input Ripple Rejection (100 Hz--120 Hz) i2t II -- -- -- 3 0.1 -- A2s mAp-p -- -- 60 -- dB 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, dc 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 Lucent Technologies Inc. Data Sheet August 1998 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Electrical Specifications (continued) Table 2. Output Specifications Parameter Output Voltage Set Point (VI = 48 V; IO = IO, max; TC = 25 C) Output Voltage (Over all line, load, and temperature conditions until end of life; see Figure 13.) 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 (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 (IO/t = 1 A/10 s, 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) Lucent Technologies Inc. Device LW020G LW020F LW020A LW020B LW020C LW020G LW020F LW020A LW020B LW020C Symbol VO, set VO, set VO, set VO, set VO, set VO VO VO VO VO Min 2.46 3.25 4.92 11.81 14.76 2.4 3.20 4.85 11.64 14.55 Typ 2.5 3.3 5.0 12.0 15.0 -- -- -- -- -- Max 2.54 3.35 5.08 12.19 15.24 2.6 3.40 5.15 12.36 15.45 Unit Vdc Vdc Vdc Vdc Vdc 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 LW020A, F, G LW020B LW020C All -- -- -- -- IO IO IO IO -- -- -- -- 0.4 0.17 0.13 103 -- -- 20 50 -- -- -- -- 20 50 100 150 4.0 1.67 1.33 150 mVrms mVrms mVp-p mVp-p A A A %IO, max LW020C LW020B LW020A, F, G LW020G LW020F LW020A LW020B LW020C IO IO IO -- -- -- 150 150 150 250 220 200 %IO, max %IO, max %IO, max 71 74 77 82 82 75 77 81 85 85 -- -- -- -- -- All -- -- 265 -- % % % % % kHz All All -- -- -- -- 1 0.5 -- -- %VO, set ms All All -- -- -- -- 1 0.5 -- -- %VO, set ms 3 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet August 1998 Electrical Specifications (continued) Table 3. Isolation Specifications Parameter Isolation Capacitance Isolation Resistance Min -- 10 Typ 0.002 -- Max -- -- Unit F M Min Typ Max Unit -- 4,500,000 -- 54 (1.9) hours g (oz.) General Specifications Parameter Calculated MTBF (IO = 80% of IO, max; TC = 40 C) Weight 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 A All Von/off -- -- 1.2 V Lucent Technologies Inc. Data Sheet August 1998 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) Lucent Technologies Inc. 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 August 1998 Characteristics Curves 82 81 80 (%) 1.0 0.8 PO = 20 W 0.7 PO = 10 W EFFICIENCY, INPUT CURRENT, II (A) 0.9 PO = 2 W 0.6 0.5 79 78 77 VI = 36 VI = 54 VI = 75 76 75 0.4 74 0.3 73 72 0.2 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0.1 OUTPUT CURRENT, IO (A) 0.0 0 10 20 30 40 50 60 70 8-1260(C).a 80 INPUT VOLTAGE, VI (V) 8-1481(C).a Figure 3. LW020A Typical Converter Efficiency vs. Output Current Figure 1. LW020 Typical Input Characteristics, TA = 25 C 86 (%) 100% VO, nom 82 80 80% VO, nom 60% VO, nom EFFICIENCY, NORMALIZED OUTPUT VOLTAGE, VO (V) 84 VI = 75 VI = 54 VI = 36 40% VO, nom 78 VI = 75 76 VI = 54 74 VI = 36 72 70 0.0 20% VO, nom 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 OUTPUT CURRENT, IO (A) 0 0 50% IO, max 100% IO, max 150% IO, max NORMALIZED OUTPUT CURRENT, IO (A) 8-1258(C).a 8-1484(C) Figure 4. LW020B Typical Converter Efficiency vs. Output Current, TA = 25 C Figure 2. LW020A, B, C, F, and G Typical Output Characteristics, TA = 25 C 6 Lucent Technologies Inc. LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet August 1998 Characteristics Curves (continued) 76 74 (%) 88 86 72 EFFICIENCY, 70 EFFICIENCY, (%) 84 82 80 78 68 66 VI = 36 V VI = 48 V VI = 75 V 64 VI = 75 76 62 VI = 54 74 VI = 36 60 0.4 72 70 0.0 0.9 1.4 1.9 2.4 2.9 3.4 3.9 OUTPUT CURRENT, IO (A) 0.2 0.4 0.6 0.8 1.0 8-1483(C).a 1.2 OUTPUT CURRENT, IO (A) 8-1485(C) Figure 7. LW020G Typical Converter Efficiency vs. Output Current, TA = 25 C 80 79 EFFICIENCY, (%) 78 77 76 75 74 VI = 75 73 VI = 54 72 VI = 36 71 70 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 NORMALIZED OUTPUT CURRENT, IO (A) NORMALIZED OUTPUT VOLTAGE, VO (V) Figure 5. LW020C Typical Converter Efficiency vs. Output Current, TA = 25 C 100% VO, nom 99% VO, nom 75% IO, max 50% IO, max OUTPUT CURRENT, IO (A) 8-1483(C) Figure 6. LW020F Typical Converter Efficiency vs. Output Current, TA = 25 C Lucent Technologies Inc. TIME, t (100 s/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% 7 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W NORMALIZED OUTPUT VOLTAGE, VO (V) Characteristics Curves (continued) Data Sheet August 1998 Test Configurations TO OSCILLOSCOPE CURRENT PROBE LTEST 101% VO, nom VI(+) 12 H 100% VO, nom CS 220 F BATTERY IMPEDANCE < 0.1 @ 20 C, 100 kHz 33 F NORMALIZED OUTPUT CURRENT, IO (A) VI(-) 8-203(C) Note: Input reflected-ripple current is measured with a simulated source impedance of 12 H. Capacitor Cs offsets possible battery impedance. Current is measured at the input of the module. 50% IO, max 25% IO, max Figure 11. Input Reflected-Ripple Test Setup TIME, t (100 s/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 VO(+) 0.1 F SCOPE RESISTIVE LOAD NORMALIZED OUTPUT VOLTAGE, VO (1 V/div) REMOTE ON/OFF, Von/off (V) (2 V/div) VO(-) 8-513(C) Note: Use a 0.1 F 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 CONTACT AND DISTRIBUTION LOSSES 50% VO, nom V I (+) V O (+) II IO LOAD SUPPLY 0 V I (-) TIME, t (1 ms/div) V O (-) CONTACT RESISTANCE 8-1263(C).b Figure 10. LW020A, B, C, F, and G Typical Output Voltage Start-Up when Signal Applied to Remote On/Off 8-204(C) 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 = ------------------------------------------------ x 100 [ V I (+) - V I (-) ]I I Figure 13. Output Voltage and Efficiency Measurement Test Setup 8 Lucent Technologies Inc. Data Sheet August 1998 Design Considerations LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W increase). The unit operates normally once the output current is brought back into its specified range. 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 F electrolytic capacitor (ESR < 0.7 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. 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 shutdown 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. 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 22.2 No. 950-95, EN60950, and IEC950. For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), one of the following must be true: All inputs are SELV and floating, with the output also floating. All inputs are SELV and grounded, with the output also grounded. Any non-SELV input must be provided with reinforced insulation from any other hazardous voltages, including the ac mains, and must have a SELV reliability test performed on it in combination with the converters. Inputs must meet SELV requirements. If the input meets extra-low voltage (ELV) requirements, then the converter's output is considered ELV. The input to these units is to be provided with a maximum 5 A normal-blow fuse in the ungrounded lead. 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 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 A. 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(+) Feature Descriptions Overcurrent Protection VI(-) - Von/off + 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 Lucent Technologies Inc. Ion/off REMOTE ON/OFF 8-758(C).a Figure 14. Remote On/Off Implementation 9 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet August 1998 Feature Descriptions (continued) 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 %: c [ d * ( 1 - % ) - 1 ] R adj-down = ---------------------------------------------------- - b k % a R adj-up = ------------------- - b k d * % Device a b c d -5% VO Radj-down +5% VO Radj-up LW020A LW020B LW020C LW020F LW020G 4.02 15.40 21.50 14.0 14.0 16.90 15.40 16.90 51.10 51.10 2.01 1.58 1.76 5.19 7.02 2.0 9.80 12.24 2.70 2.0 19.3 k 246.5 k 356.3 k 110.9 k 75.3 k 23.3 k 16.0 k 18.2 k 52.8 k 88.9 k 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. 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. 10 Lucent Technologies Inc. LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet August 1998 Thermal Considerations (continued) Example What is the minimum airflow necessary for a LW020A operating at nominal line, an output current of 3.6 A, and a maximum ambient temperature of 85 C? 26.9 (1.06) Solution: Lucent TRIM ON/OFF NC Given: VI = 48 V, IO = 3.6 A, TA = 85 C Determine PD (Figure 17): PD = 4.5 W Determine airflow (Figure 16): v = 1.0 ms-1 (200 ft./min.) 19.6 (0.77) - - OUT IN LW020A81 + DC-DC CONVERTER + 7 MADE IN USA TUV Rheinland CASE PIN (OPTIONAL) 8-1265(C) Note: Dimensions are in millimeters and (inches). Figure 15. Case Temperature Measurement Location POWER DISSIPATION, PD (W) IN:DC 36-75V, 1.1A OUT:DC 5.0V, 4A 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 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 power of the module should not exceed the rated power for the module as listed in the Ordering Information table. 40 50 60 70 80 90 100 110 120 MAX AMBIENT TEMPERATURE, TA (C) 8-1264(C).a 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 Heat Transfer 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. POWER DISSIPATION, PD (W) 6 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.). 5 4 3 2 VI = 75 VI = 48 VI = 36 1 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 OUTPUT CURRENT, IO (A) 8-1275(C).a Figure 17. LW020A Power Dissipation vs. Output Current Lucent Technologies Inc. 11 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet August 1998 Thermal Considerations (continued) 4.5 POWER DISSIPATION, PD (W) Heat Transfer (continued) POWER DISSIPATION, PD (W) 6 5 4 VI = 75 3 3.5 3.0 2.5 2.0 VI = 36 V VI = 48 V VI = 75 V 1.5 1.0 0.5 0.4 2 0.2 0.4 0.6 0.8 1.0 0.9 1.4 1.9 2.4 2.9 3.4 3.9 OUTPUT CURRENT, IO (A) VI = 54 VI = 36 1 0 0.0 4.0 8-1478(C).a 1.2 1.4 1.6 Figure 20. LW020F and G Power Dissipation vs. Output Current, TA = 25 C OUTPUT CURRENT, IO (A) 8-1479(C) Thermal Measurements Figure 18. LW020B Power Dissipation vs. Output Current, TA = 25 C The derating curves in Figure 16 were obtained 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. POWER DISSIPATION, PD (W) 4.5 4.0 3.5 VI = 75 3.0 FACING PWB PWB 2.5 2.0 1.5 VI = 54 1.0 MODULE VI = 36 0.5 0.0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 OUTPUT CURRENT, IO (A) 8-1477(C) Figure 19. LW020C Power Dissipation vs. Output Current, TA = 25 C AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE AIRFLOW 76 (3.0) 13 (0.5) 8-1126(C).d Note: Dimensions are in millimeters and (inches). Figure 21. Experimental Test Setup 12 Lucent Technologies Inc. LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet August 1998 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 50.8 (2.00) Lucent - IN + 50.8 (2.00) - LW020A81 DC-DC CONVERTER Function 1 Remote On/Off 2 No Connection (sync feature optional) TRIM ON/OFF NC Pin OUT + IN:DC 36-75V, 1.1A OUT:DC 5.0V, 4A MADE IN USA TUV Rheinland 3 VI(-) 4 VI(+) 5 Case Pin (pin optional) 6 Trim 7 - Output 8 + Output CASE PIN (OPTIONAL) Side View 0.38 0.13 (0.015 0.005) 9.91 0.38 (0.390 0.015) 4.70 (0.185) MIN 1.02 (0.040) DIA SOLDER-PLATED BRASS, ALL PINS STANDOFFS 1.78 x 0.51 THICK (0.070 x 0.020), 4 PLACES Bottom View 22.9 (0.90) 20.3 (0.80) 5.08 (0.200) 5 8 4 5.08 (0.200) 5.08 (0.200) 10.16 (0.400) 3 7 2 1 10.16 (0.400) 5.08 (0.200) 6 2.5 (0.10) REF 2.5 (0.10) 45.72 0.38 (1.800 0.015) 8-1198(C).g Lucent Technologies Inc. 13 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet August 1998 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) 50.8 (2.00) 7.62 (0.300) 10.16 (0.400) 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 48 V 48 V 48 V 48 V 48 V Output Voltage 2.5 V 3.3 V 5V 12 V 15 V Output Power 10 W 13.2 W 20 W 20 W 20 W Device Code LW020G LW020F LW020A LW020B LW020C Comcode 108258195 107640807 107314304 107681033 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 Lucent Technologies Network Products Group Account Manager or Application Engineer for pricing and availability of options. Table 5. Options Option Short pin: 2.79 mm 0.25 mm (0.110 in. 0.010 in.) Case ground pin Synchronization Negative remote on/off logic 14 Device Code Suffix 8 7 3 1 Lucent Technologies Inc. Data Sheet August 1998 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Notes Lucent Technologies Inc. 15 LW020 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 20 W Data Sheet August 1998 For additional information, contact your Lucent Technologies Account Manager or the following: POWER SYSTEMS UNIT: Network Products Group, Lucent Technologies Inc., 3000 Skyline Drive, Mesquite, TX 75149, USA +1-800-526-7819 (Outside U.S.A.: +1-972-284-2626, FAX +1-972-284-2900) (product-related questions or technical assistance) INTERNET: http://www.lucent.com/networks/power E-MAIL: techsupport@lucent.com ASIA PACIFIC: Lucent Technologies Singapore Pte. Ltd., 750A Chai Chee Road #05-01, Chai Chee Industrial Park, Singapore 469001 Tel. (65) 240 8041, FAX (65) 240 8053 JAPAN: Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141-0022, Japan Tel. (81) 3 5421 1600, FAX (81) 3 5421 1700 LATIN AMERICA: Lucent Technologies Inc., Room 9N128, One Alhambra Plaza, Coral Gables, FL 33134, USA Tel. +1-305-569-4722, FAX +1-305-569-3820 EUROPE: Data Requests: DATALINE: Tel. (44) 1189 324 299, FAX (44) 1189 328 148 Technical Inquiries:GERMANY: (49) 89 95086 0 (Munich), UNITED KINGDOM: (44) 1344 865 900 (Bracknell), FRANCE: (33) 1 40 83 68 00 (Paris), SWEDEN: (46) 8 594 607 00 (Stockholm), FINLAND: (358) 9 4354 2800 (Helsinki), ITALY: (39) 02 6608131 (Milan), SPAIN: (34) 91 807 1441 (Madrid) Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. Copyright (c) 1998 Lucent Technologies Inc. All Rights Reserved Printed in U.S.A. August 1998 DS97-280EPS (Replaces DS94-171EPS) Printed On Recycled Paper