Data Sheet July 27, 2009 JNW350R Series Power Modules; DC-DC Converters 36-75 Vdc Input; 28Vdc Output; 350W Output Features Compliant to RoHS EU Directive 2002/95/EC Compatible in a Pb-free or SnPb reflow environment Compliant to IPC-9592, Class I, Category 2 High power density: 129 W/in3 Industry standard half-brick pin-out Low output ripple and noise Industry standard half-brick footprint 57.7mm x 60.7mm x 12.7mm RoHS Compliant Applications (2.27” x 2.39” x 0.5”) Remote Sense 2:1 input voltage range RF Power Amplifier Single tightly regulated output Wireless Networks Constant switching frequency Switching Networks Accepts transient overloads without shutdown Options Latch after fault shutdown Over temperature protection auto restart Output voltage adjustment trim, 16.8Vdc to 32.0Vdc Wide operating case temperature range (-40°C to 100°C) Output OCP/OVP auto restart Shorter pins Unthreaded heatsink holes CE mark meets 2006/95/EC directives§ Tunable Loop™ for transient response optimization UL60950-1/CSA† C22.2 No. 60950-1-03 Certified ‡ (CCSAUS) and VDE 0805:2001-12 (EN60950-1) Licensed ISO** 9001 and ISO 14001 certified manufacturing facilities Description The JNW350R series of dc-dc converters are a new generation of isolated DC/DC power modules providing up to 350W output power in an industry standard half-brick size footprint, which makes it an ideal choice for high voltage and high power applications. Threaded-through holes are provided to allow easy mounting or addition of a heatsink for high-temperature applications. The output is fully isolated from the input, allowing versatile polarity configurations and grounding connections. This module contains an optional new feature, the Tunable LoopTM, that allows the user to optimize the dynamic response of the converter to match the load with reduced amount of output capacitance, leading to savings on cost and PWB area. * 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. ** ISO is a registered trademark of the International Organization of Standards ‡ Document No: PDS08-005 ver 1.1 PDF name: jnw350r.ds.pdf : Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device 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 the device reliability. Parameter Device Symbol Min Max Unit Input Voltage Continuous All VIN -0.3 80 Vdc Transient, operational (≤100 ms) All VIN,trans -0.3 100 Vdc Operating Ambient Temperature Note: When the operating ambient temperature is within 55°C ~85°C, the application of the module refers to the derating curves of Figures 21 and 22. Operating Case Temperature (See Thermal Considerations section, Figure 20) All Ta -40 85 °C All Tc -40 100 °C Storage Temperature All Tstg -55 125 °C I/O Isolation Voltage: Input to Case, Input to Output All ⎯ ⎯ 1500 Vdc All ⎯ ⎯ 500 Vdc Output to Case Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Parameter Device Symbol Min Typ Max Unit All VIN 36 48 75 Vdc All IIN,max 12.5 Adc Inrush Transient All 2 2 As Input Reflected Ripple Current, peak-to-peak (5Hz to 20MHz, 12μH source impedance; VIN=0V to 75V, IO= IOmax ; see Figure 7) All Input Ripple Rejection (120Hz) All Operating Input Voltage (see Figure 12 for VIN, min when using trim-up feature) Maximum Input Current (VIN=36V to 75V, IO=IO, max) It 20 50 2 mAp-p dB CAUTION: This power module is not internally fused. An input line fuse must always be used. This power module can be used in a wide variety of applications, ranging from simple standalone operation to being an integrated part of complex power architecture. To preserve maximum flexibility, internal fusing is not included. Always use an input line fuse, to achieve maximum safety and system protection. The safety agencies require a time-delay or fast-acting fuse with a maximum rating of 20 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 sheet for further information. LINEAGE POWER 2 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Electrical Specifications (continued) Parameter Device Output Voltage Set-point (VIN=VIN,nom, IO=IO, max, Tc =25°C) All Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life) All Symbol Min Typ Max Unit VO, set 27.5 28 28.5 Vdc VO 27.15 ⎯ 28.85 Vdc Output Regulation Line (VIN=VIN, min to VIN, max) All ⎯ 0.1 0.2 %Vo,set Load (IO=IO, min to IO, max) All ⎯ 0.1 0.2 %Vo,set Temperature (Tc = -40ºC to +100ºC) All ⎯ 0.25 0.5 %Vo,set RMS (5Hz to 20MHz bandwidth) All ⎯ 45 55 mVrms Peak-to-Peak (5Hz to 20MHz bandwidth) All ⎯ 80 200 mVpk-pk Output Ripple and Noise on nominal output (VIN=VIN, nom and IO=IO, min to IO, max) External Capacitance (ESR > 50 mΩ) 1 Without the Tunable Loop™ (ESRMAX = 80mΩ) With the Tunable Loop™ (ESR > 50 mΩ)2 1 All, except -T -T -T CO 440 6500 μF CO CO 440 440 470 8,000 μF μF Output Current All Io 1.0 Output Current Limit Inception All IO, lim 13.1 Output Short Circuit Current (VO≤ 0.25Vdc) All IO, sc Efficiency VIN=VIN, nom, Tc=25°C IO=IO, max , VO= VO,set All η ⎯ fsw ⎯ Switching Frequency 12.5 Adc 17.5 Adc 30 Arms 92 ⎯ % 300 ⎯ kHz ⎯ Dynamic Load Response (ΔIo/Δt=1A/10μs; Vin=Vin,nom; Tc=25°C; Tested with a 470 μF aluminum and a 10 µF ceramic capacitor across the load.) Load Change from Io= 50% to 75% of Io,max: Peak Deviation All ⎯ ⎯ Vpk 2 %VO, set Settling Time (Vo<10% peak deviation) ms ts ⎯ 1.5 ⎯ Load Change from Io= 25% to 50% of Io,max: ⎯ ⎯ Vpk 2 %VO, set Peak Deviation ts ms ⎯ 1.5 ⎯ Settling Time (Vo<10% peak deviation) 1 Note: use a minimum 2 x 220uF output capacitor. Recommended capacitor is Nichicon CD series, 220uF/35V. If the ambient temperature is less than 0°C, use 3x of the minimum CO. 2 External capacitors may require using the new Tunable Loop™ feature to ensure that the module is stable as well as getting the best transient response. See the Tunable Loop™ section for details. Isolation Specifications Parameter Symbol Min Typ Max Isolation Capacitance Ciso ⎯ 15000 ⎯ Unit pF Isolation Resistance Riso 10 ⎯ ⎯ MΩ Min Typ Max Unit General Specifications Parameter Device Calculated Reliability based upon Telcordia SR332 Issue 2: Method I Case 3 (IO=80%IO, max, TA=40°C, airflow = 200 lfm, 90% confidence) All Weight All LINEAGE POWER Symbol 9 FIT 379 10 /Hours MTBF 2,638,332 Hours ⎯ 78 2.8 ⎯ g oz. 3 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter Device Symbol Min Typ Max Unit All All All All Ion/off Von/off Von/off Ion/off ⎯ 0 ⎯ ⎯ ⎯ ⎯ 1.0 1.2 5 50 mA Vdc Vdc μA All Tdelay All Tdelay ⎯ 25 30 ms Trise ⎯ 25 ⎯ ms 3 % VO, set 2 %Vo,nom 32.0 Vdc Remote On/Off Signal Interface (VIN=VIN, min to VIN, max ; open collector or equivalent, Signal referenced to VIN- terminal) Negative Logic: device code suffix “1” Logic Low = module On, Logic High = module Off Positive Logic: No device code suffix required Logic Low = module Off, Logic High = module On Logic Low - Remote On/Off Current Logic Low - On/Off Voltage Logic High Voltage – (Typ = Open Collector) Logic High maximum allowable leakage current ⎯ Turn-On Delay and Rise Times (Vin=Vin,nom, IO=IO, max, Tc=25C) Case 1: Tdelay = Time until VO = 10% of VO,set from application of Vin with Remote On/Off set to ON, Case 2: Tdelay = Time until VO = 10% of VO,set from application of Remote On/Off from Off to On with Vin already applied for at least one second. Trise = time for VO to rise from 10% of VO,set to 90% of VO,set. All 85 Output Voltage Overshoot (IO=80% of IO, max, Tc =25°C) Output Voltage Adjustment (See Feature Descriptions): ms Output Voltage Remote-sense Range (only for No Trim or Trim down application ) All Vsense Output Voltage Set-point Adjustment Range (trim) All Vtrim 16.8 All VO, limit 34 ⎯ 38 Vdc All Tref ⎯ 110 ⎯ °C 35 36 31 32 Vdc 3 Vdc Output Overvoltage Protection Over Temperature Protection __ __ __ (See Feature Descriptions) Input Under Voltage Lockout VIN, UVLO Turn-on Threshold All Turn-off Threshold All Hysteresis All Input Over voltage Lockout VIN, OVLO Turn-on Threshold All ⎯ 79.5 81 Vdc Turn-off Threshold All 81 83 ⎯ Vdc --- 3 --- Vdc Hysteresis LINEAGE POWER Vdc All 4 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Characteristic Curves 94 EFFICIENCY (%) 92 90 Vin=36V 88 Vin=48V 86 Vin=75V 84 82 0 2.5 5 7.5 10 12.5 Figure 4. Typical Start-Up Using negative Remote On/Off; Co,ext = 470µF. INPUT VOLTAGE OUTPUT VOLTAGE VO(V) (10V/div) Vin (V) (20V/div) TIME, t (20ms/div) Figure 1. Converter Efficiency versus Output Current. OUTPUT VOLTAGE VO (V) (50mV/div) OUTPUT CURRENT, Io (A) On/Off VOLTAGE OUTPUTVOLTAGE VO (V) (10V/div) VON/OFF(V) (2V/div) The following figures provide typical characteristics for the JNW350R (28V, 18A) at 25ºC. The figures are identical for either positive or negative Remote On/Off logic. OUTPUT CURRENT OUTPUT VOLTAGE VO(V) (200mV/div) IO (A) (5A/div) TIME, t (20ms/div) Figure 5. Typical Start-Up from VIN, on/off enabled prior to VIN step; Co,ext = 470µF. OUTPUT CURRENT OUTPUT VOLTAGE VO(V) (200mV/div) IO (A) (5A/div) TIME, t (1μs/div) Figure 2. Typical Output Ripple and Noise at Room Temperature and 48Vin; Io = Io,max; Co,ext = 470µF. TIME, t (1ms/div) Figure 3. Standard JNW350R Transient Response to Dynamic Load Change from 25% to 50% to 25% of Full Load at Room Temperature and 48 Vdc Input; 0.1A/uS, Co,ext = 470µF LINEAGE POWER TIME, t (1ms/div) Figure 6. Standard JNW350R Transient Response to Dynamic Load Change from 50% to 75% to 50% of Full Load at Room Temperature and 48 Vdc Input; 0.1A/uS, Co,ext = 470µF 5 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Test Configurations Design Considerations Input Source Impedance The power module should be connected to a low ac-impedance source. A highly inductive source impedance can affect the stability of the power module. For the test configuration in Figure 7, a 470μF Low ESR aluminum capacitor, CIN , mounted close to the power module helps ensure the stability of the unit. Consult the factory for further application guidelines Output Capacitance Note: Measure the input reflected-ripple current with a simulated source inductance (LTEST) of 12 µH. Capacitor CS offsets possible battery impedance. Measure the current, as shown above. Figure 7. Input Reflected Ripple Current Test Setup. The JNW350R power module requires a minimum output capacitance of 440µF Low ESR aluminum capacitor, Cout to ensure stable operation over the full range of load and line conditions, see Figure 8. If the ambient temperature is under -20C, it is required to use at least 3 pcs of minimum capacitors in parallel. In general, the process of determining the acceptable values of output capacitance and ESR is complex and is load-dependant. Safety Considerations Note: Use a Cout (470 µF Low ESR aluminum or tantalum capacitor typical), a 0.1 µF ceramic capacitor and a 10 µF ceramic capacitor, and Scope measurement should be made using a BNC socket. Position the load between 51 mm and 76 mm (2 in. and 3 in.) from the module. Figure 8. Output Ripple and Noise Test Setup. 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. 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., UL60950-1, CSA C22.2 No. 60950-103, EN60950-1 and VDE 0805:2001-12. For end products connected to –48V dc, or –60Vdc nominal DC MAINS (i.e. central office dc battery plant), no further fault testing is required. *Note: -60V dc nominal battery plants are not available in the U.S. or Canada. For all input voltages, other than DC MAINS, where the input voltage is less than 60V dc, if the input meets all of the requirements for SELV, then: The output may be considered SELV. Output voltages will remain within SELV limits even with internally-generated non-SELV voltages. Single component failure and fault tests were performed in the power converters. Figure 9. Output Voltage and Efficiency Test Setup. LINEAGE POWER One pole of the input and one pole of the output are to be grounded, or both circuits are to be kept floating, to maintain the output voltage to ground voltage within ELV or SELV limits. However, SELV will not be maintained if VI(+) and VO(+) are grounded simultaneously. 6 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Safety Considerations (continued) For all input sources, other than DC MAINS, where the input voltage is between 60 and 75V dc (Classified as TNV-2 in Europe), the following must be meet, if the converter’s output is to be evaluated for SELV: The input source is to be provided with reinforced insulation from any hazardous voltage, including the ac mains. One Vi pin and one Vo pin are to be reliably earthed, or both the input and output pins are to be kept floating. 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. All flammable materials used in the manufacturing of these modules are rated 94V-0, or tested to the UL60950 A.2 for reduced thickness. The input to these units is to be provided with a maximum 20 A fast-acting or time-delay fuse in the unearthed lead. Feature Description Remote On/Off Two remote on/off options are available. Positive logic turns the module on during a logic high voltage on the 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 (open collector or equivalent) to control the voltage (Von/off) between the ON/OFF terminal and the VIN(-) terminal (see Figure 10). Logic low is 0V ≤ Von/off ≤ 1.2V. The maximum Ion/off during a logic low is 1mA, the switch should be maintain a logic low level whilst sinking this current. During a logic high, the typical maximum Von/off generated by the module is 5V, and the maximum allowable leakage current at Von/off = 5V is 50μA. If not using the remote on/off feature: For positive logic, leave the ON/OFF pin open. For negative logic, short the ON/OFF pin to VIN(-). LINEAGE POWER Figure 10. Circuit configuration for using Remote On/Off Implementation. Overcurrent Protection To provide protection in a fault output overload condition, the module is equipped with internal current limiting protection circuitry, and can endure overcurrent transient overloads depending upon the duration and amplitude of the overload. An internal buffer measures the relative product of the duration and amplitude of the overload and allows operation until a limit threshold is reached. For lower amplitude overloads, the module will operate without shutdown for a longer transient overload. If the overload amplitude is larger, the module will reach shutdown in a shorter period of time. A latching shutdown option is standard. If overcurrent persists for beyond the overload buffer, the module will shut down and remain off until the module is reset by either cycling the input power or by toggling the on/off pin for one second. An auto-restart option (4) is also available in a case where an auto recovery is required. If overcurrent persists for few milli-seconds, the module will shut down and auto restart until the fault condition is corrected. If the output overload condition still exists when the module restarts, it will shut down again. This operation will continue indefinitely, until the overcurrent condition is corrected. Over Voltage Protection The output overvoltage protection consists of circuitry that monitors the voltage on the output terminals. If the voltage on the output terminals exceeds the over voltage protection threshold, then the module will shutdown and latch off. The overvoltage latch is reset by either cycling the input power for one second or by toggling the on/off signal for one second. The protection mechanism is such that the unit can continue in this condition until the fault is cleared. An auto-restart option (4) is also available in a case where an auto recovery is required. 7 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Feature Description (continued) 33 31 Remote sense Vout (V) Remote sense minimizes the effects of distribution losses by regulating the voltage at the remote-sense connection (see Figure 11). For No Trim or Trim down application, the voltage between the remote-sense pin and the output terminal must not exceed the output voltage sense range given in the Feature Specifications table i.e.: SENSE(+) – Vo(+) ≤ 2% of Vo,nom. The voltage between the Vo(+) and Vo(-) terminals must not exceed the minimum output overvoltage shut-down value indicated in the Feature Specifications table. This limit includes any increase in voltage due to remote-sense compensation and output voltage set-point adjustment (trim). See Figure 11. Do not connect SENSE(-) to the Vo(-) or Rload(-) as there is a 0Ω connection internal to the module. If not using the remote-sense feature to regulate the output at the point of load, then connect SENSE(+) to Vo(+). Although the output voltage can be increased by both the remote sense and by the trim, the maximum increase for the output voltage is not the sum of both. The maximum increase is the larger of either the remote sense or the trim. The amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the output current. When using remote sense and trim: the output voltage of the module can be increased, which at the same output current would increase the power output of the module. Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power. 29 Upper Trim Limit 27 25 23 21 Lower Trim Limit 19 17 15 35 40 45 50 55 Vin (V) 60 65 70 75 Figure 12. Output voltage trim limits vs. Input Voltage. Modules without the –T Option Trim Down – Decrease Output Voltage Trimming down is accomplished by connecting an external resistor between the TRIM pin and the SENSE(-) pin. With an external resistor (Radj-down) between the TRIM and SENSE(-) pins, the output voltage set point (Vo,adj) decreases (see Figure 13). The following equation determines the required external-resistor value to obtain a percentage output voltage change of Δ%. For output voltages: 28V ⎛ 100 ⎞ Radj − down = ⎜ − 2 ⎟kΩ ⎝ Δ% ⎠ Where, Δ% = Vo , nom − Vdesired × 100 Vo , nom Vdesired = Desired output voltage set point (V). Figure 11. Effective Circuit Configuration for Single-Module Remote-Sense Operation Output Voltage. Output Voltage Programming Trimming allows the user to increase or decrease the output voltage set point of a module. The trim resistor should be positioned close to the module. Certain restrictions apply to the input voltage lower limit when trimming the output voltage to the maximum. See Figure 12 for the allowed input to output range when using trim. If not using the trim down feature, leave the TRIM pin open. LINEAGE POWER Figure 13. Circuit Configuration to Decrease Output Voltage, Standard JNW350R. Trim Up – Increase Output Voltage Trimming up is accomplished by connecting external resistor between the SENSE(+) pin and TRIM pin.With an external resistor (Radj-up) connected between the SENSE(+) and TRIM pins, the output voltage set point (Vo,adj) increases (see Figure 14). 8 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Modules with the –T Option Feature Description (continued) The following equation determines the required external-resistor value to obtain a percentage output voltage change of Δ%. For output voltages: 28V R adj × (100 + Δ %) ⎡V (100 + ( 2 × Δ %) = ⎢ O , nom − 1 . 225 × Δ % Δ% ⎣ − up Where, Δ% = Vdesired − Vo , nom × 100 Vo , nom Vdesired = Desired output voltage set point (V). Trim Down – Decrease Output Voltage ⎤ ⎥ kΩ ⎦ With an external resistor (Radj-down) between the TRIM and SENSE(+) pins, the output voltage set point (Vo,adj) decreases (see Figure 15). The following equation determines the required external-resistor value to obtain a percentage output voltage change of Δ%. For output voltages: 28V ⎛ 10631.45 ⎞ Radj − down = ⎜ − 111.2 ⎟kΩ ⎝ Δ% ⎠ Where, Δ% = Vo , nom − Vdesired × 100 Vo , nom Vdesired = Desired output voltage set point (V). Figure 14. Circuit Configuration to Increase Output Voltage, Standard JNW350R. Examples: To trim down the output of a nominal 28V module to 16.8V 28V − 16.8V Δ% = ×100 28V ∆% = 40 Figure 15. Circuit Configuration to Decrease Output Voltage, JNW350R-T option. Trim Up – Increase Output Voltage With an external resistor (Radj-up) connected between the SENSE(-) and TRIM pins, the output voltage set point (Vo,adj) increases (see Figure 16). Radj - down = 0.5 kΩ The following equation determines the required external-resistor value to obtain a percentage output voltage change of Δ%. For output voltages: 28V To trim up the output of a nominal 28V module to 30.8V ⎛ 20.47 ⎞ Radj − up = ⎜ ⎟kΩ ⎝ Δ% ⎠ ⎛ 100 ⎞ Radj − down = ⎜ − 2 ⎟kΩ ⎝ 40 ⎠ Δ% = 30.8V − 28V × 100 28V Δ% = 10 ⎡ 28 × (100 + 10 ) (100 + ( 2 × 10 ) ⎤ − Radj −up = ⎢ ⎥⎦ kΩ 10 ⎣ 1.225 × 10 Radj - up = 239.4 kΩ LINEAGE POWER Where, Δ% = Vdesired − Vo , nom × 100 Vo , nom Vdesired = Desired output voltage set point (V). 9 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Feature Description (continued) Figure 17. Circuit Configuration to Actively Adjust the Output Voltage. Figure 16. Circuit Configuration to Increase Output Voltage, JNW350Rx-T option. Examples: To trim down the output of a nominal 28V JNW350-T module to 16.8V Δ% = 28V − 16.8V ×100 28V ∆% = 40 ⎛ 10631.45 ⎞ Radj − down = ⎜ − 111.2 ⎟kΩ 40 ⎝ ⎠ Radj - down = 154.5 kΩ To trim up the output of a nominal 28V JNW350-T module to 30.8V 30.8V − 28V Δ% = × 100 28V Δ% = 10 ⎛ 20.47 ⎞ Radj − up = ⎜ ⎟kΩ ⎝ 10 ⎠ Radj - up = 2.0 kΩ Tunable Loop™ The JNW350Rx-T modules have a new feature that optimizes transient response of the module called Tunable Loop™. External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and noise and to reduce output voltage deviations from the steady-state value in the presence of dynamic load current changes. Adding external capacitance however affects the voltage control loop of the module, typically causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause the module to become unstable. The Tunable LoopTM allows the user to externally adjust the voltage control loop to match the filter network connected to the output of the module. The TM Tunable Loop is implemented by connecting a series R-C between the SENSE(+) and TRIM pins of the module, as shown in Fig. 48. This R-C allows the user to externally adjust the voltage loop feedback compensation of the module. Active Voltage Programming For both the JNW350Rx and JNW350Rx-T, a DigitalAnalog converter (DAC), capable of both sourcing and sinking current, can be used to actively set the output voltage, as shown in Figure 17. The value of RG will be dependent on the voltage step and range of the DAC and the desired values for trim-up and trimdown Δ%. Please contact your Lineage Power technical representative to obtain more details on the selection for this resistor. Figure 18. Circuit diagram showing connection of RTUNE and CTUNE to tune the control loop of the module. Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Tables 1 and 2. Table 1 shows the recommended values of LINEAGE POWER 10 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output RTUNE and CTUNE for different values of ceramic output capacitors up to 8000μF that might be needed for an application to meet output ripple and noise requirements. Selecting RTUNE and CTUNE according to Table 2 will ensure stable operation of the module In applications with tight output voltage limits in the presence of dynamic current loading, additional output capacitance will be required. Table 2 lists recommended values of RTUNE and CTUNE in order to meet 2% output voltage deviation limits for some common output voltages in the presence of a 6A to 12A step change (50% of full load), with an input voltage of 48V. Table 1. General recommended values of of RTUNE and CTUNE for Vout=28V and various external ceramic capacitor combinations. Cout(µF) 1100 2200 4400 6600 RTUNE(kΩ) 348 200 51.1 36.5 8000 40.2 CTUNE(pF) 1500 6800 10,000 15,000 15,000 conduction, convection, and radiation to the surrounding environment. Proper cooling can be verified by measuring the case temperature. Peak temperature (TREF) occurs at the position indicated in Figure 15. Considerations include ambient temperature, airflow, module power dissipation, and the need for increased reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The thermal data presented here is based on physical measurements taken in a wind tunnel. For reliable operation this temperature should not exceed 100ºC at TREF 1 for cold plate applications or exceed 112ºC at TREF 2 for applications using forced convection airflow. The output power of the module should not exceed the rated power for the module as listed in the ordering Information table. Although the maximum TREF temperature of the power modules is discussed above, you can limit this temperature to a lower value for extremely high reliability. Table 2. Recommended values of RTUNE and CTUNE to obtain transient deviation of 2% of Vout for a 6A step load with Vin=48V. Vo Co(uF) RTUNE(kΩ) CTUNE(pF) ΔV 32V 880 1000 820 530 28V 880 402 1500 500 25V 1100 348 1500 530 22V 1320 221 2200 420 19V 1320 84.5 3300 370 16.8V 1540 61.9 6800 317 Please contact your Lineage Power technical representative to obtain more details of this feature as well as for guidelines on how to select the right value of external R-C to tune the module for best transient performance and stable operation for other output capacitance values. Over Temperature Protection The JNW350R module provides with non-latching over temperature protection. A temperature sensor monitors the operating temperature of the converter. If the reference temperature exceeds a threshold of 110 ºC (typical) at the center of the baseplate, the converter will shut down and disable the output. When the baseplate temperature has decreased by approximately 20 ºC the converter will automatically restart. The module can be restarted by cycling the dc input power for at least one second or by toggling the remote on/off signal for at least one second. Thermal Considerations The power modules operate 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 LINEAGE POWER Figure 19. Case (TREF ) Temperature Measurement Location (top view). Thermal Derating Thermal derating is presented for two different applications: 1) Figure 20, the JNW350R module is thermally coupled to a cold plate inside a sealed clamshell chassis, without any internal air circulation; and 2) Figure 21 and 22, the JNW350R module is mounted in a traditional open chassis or cards with forced air flow. In application 1, the module is cooled entirely by conduction of heat from the module primarily through the top surface to a coldplate, with some conduction through the module’s pins to the power layers in the system board. For application 2, the module is cooled by heat removal into a forced airflow that passes through the interior of the module and over the top baseplate and/or attached heatsink. 11 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Thermal Considerations (continued) Layout Considerations The JNW350R power module series are aluminum base board packaged style, as such; component clearance between the bottom of the power module and the mounting (Host) board is limited. Avoid placing copper areas on the outer layer directly underneath the power module. Output Power (W) 375 350 325 300 Post Solder Cleaning and Drying Considerations 275 250 20 30 40 50 60 70 80 Baseplate Temperature (C) 90 100 Figure 20. Output Power Derating for JNW350R in Conduction cooling (cold plate) applications; Ta <70ºC in vicinity of module interior; VIN = VIN, Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of the finished circuit-board assembly. For guidance on appropriate soldering, cleaning and drying procedures, refer to Lineage Power Board Mounted Power Modules: Soldering and Cleaning Application Note. Through-Hole Lead-Free Soldering Information Figure 21. Derating Output Current vs. local Ambient temperature and Airflow, No Heatsink, Vin=48V. The RoHS-compliant through-hole products use the SAC (Sn/Ag/Cu) Pb-free solder and RoHS-compliant components. They are designed to be processed through single or dual wave soldering machines. The pins have an RoHS-compliant finish that is compatible with both Pb and Pb-free wave soldering processes. A maximum preheat rate of 3°C/s is suggested. The wave preheat process should be such that the temperature of the power module board is kept below 210°C. For Pb solder, the recommended pot temperature is 260°C, while the Pb-free solder pot is 270°C max. Not all RoHS-compliant through-hole products can be processed with paste-through-hole Pb or Pb-free reflow process. If additional information is needed, please consult with your Lineage Power representative for more details Figure 22. Derating Output Current vs. local Ambient temperature and Airflow, 1” Heatsink, Vin=48V. LINEAGE POWER 12 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Mechanical Outline for Through-Hole Module Dimensions are in inches and [millimeters]. Tolerances: x.xx in. ± 0.02 in. [x.x mm ± 0.5 mm] (Unless otherwise indicated) x.xxx in ± 0.010 in. [x.xx mm ± 0.25 mm] TOP VIEW SIDE VIEW BOTTOM VIEW Pin 1 2 3 LINEAGE POWER Description Vin (+) On/Off Baseplate Pin 4 5 6 Description Vin (–) Vout (–) Sense (-) Pin 7 8 9 Description Trim Sense (+) Vout (+) 13 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Recommended Pad Layout for Through Hole Module Dimensions are in inches and [millimeters]. Tolerances: x.xx in. ± 0.02 in. [x.x mm ± 0.5 mm] (Unless otherwise indicated) x.xxx in ± 0.010 in. [x.xx mm ± 0.25 mm] LINEAGE POWER 14 Data Sheet July 27, 2009 JNW350R Power Modules; DC-DC Converters 36 – 75 Vdc Input; 28Vdc Output; 350W Output Ordering Information Please contact your Lineage Power Sales Representative for pricing, availability and optional features. Table 1. Device Code 48V (36-75Vdc) Output Voltage 28V Output Current 12.5A 92% Connector Type Through hole 48V (36-75Vdc) 28V 12.5A JNW350R641 92% Through hole JNW350R64 -18 48V (36-75Vdc) 28V CC109141512 12.5A 92% Through hole JNW350R641-18 CC109147451 48V (36-75Vdc) 28V 12.5A 92% Through hole JNW350R641Z CC109148623 48V (36-75Vdc) 28V 12.5A 92% Through hole JNW350R641-18Z CC109149712 48V (36-75Vdc) 28V 12.5A 92% Through hole JNW350R641-TZ CC109149836 48V (36-75Vdc) 28V 12.5A 92% Through hole JNW350R41-18TZ CC109150083 Input Voltage Efficiency Product codes Comcodes CC109147476 Table 2. Device Options Ratings Characteristic Form Factor Family Designator Input Voltage Output Power Output Voltage Pin Length Options Action following Protective Shutdown Character and Position Definition J J = Half Brick N W W = Wide Range, 36V-75V 350 = 350 Watts Maximum Output Power R = 28.0V nominal Omit = No Trim 6 = Pin Length: 3.68 mm ± 0.25mm , (0.145 in. ± 0.010 in.) 8 = Pin Length: 2.79 mm ± 0.25mm , (0.110 in. ± 0.010 in.) Omit = Latching Mode 4 = Auto-restart following shutdown (Overcurrent/Overvoltage) Omit = Positive Logic 1 = Negative Logic 350 R 6 8 4 On/Off Logic Customer Specific Mechanical Features Tunable Loop™ RoHS 1 XY XY = Customer Specific Modified Code, Omit for Standard Code Omit = Standard open Frame Module 18= Unthreaded heat sink inserts 18 T Internal compensation network optimized for Tunable Loop™ applications Omit = RoHS 5/6, Lead Based Solder Used Z Z = RoHS 6/6 Compliant, Lead free Asia-Pacific Headquarters Tel: +65 6416 4283 World Wide Headquarters Lineage Power Corporation 3000 Skyline Drive, Mesquite, TX 75149, USA +1-800-526-7819 (Outside U.S.A.: +1-972-284-2626) www.lineagepower.com e-mail: [email protected] Europe, Middle-East and Africa Headquarters Tel: +49 89 6089 286 India Headquarters Tel: +91 80 28411633 Lineage Power reserves the right to m ake changes to t he product(s) or inf ormation 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. © 2008 Lineage Pow er C orporation, (Mesquite, Texas) All I nternational Rights Res erved. Document No: DS08-005 ver 1.1 PDF name: jnw350r.ds.pdf