DC025 DC025AJ-M DC025AA-M DC025BK-M DC025CL-M DC025AB-M DC025AF-M DC025BB-M - Datasheet Archive

 

May 1998 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Features s s Efficiency greater than 80% s Wide

 

Data Sheet May 1998 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Features s s Efficiency greater than 80% s Wide operating temperature range s Low output noise s Industry-standard pinout s Metal case with separate case ground pin s The DC025 DC025 Dual-Output-Series Power Modules use advanced, surface-mount technology and deliver high-quality, compact, dc-dc conversion at an economical price. Small size: 71.1 mm x 61.0 mm x 12.7 mm (2.80 in. x 2.40 in. x 0.50 in.) 2:1 input voltage range s Two tightly regulated outputs s Remote on/off (positive logic) s Options s UL* Recognized, CSA Certified, and VDE Licensed Within FCC and CISPR Class A radiated limits s Higher accuracy output voltage clamp set point s Short pins: 2.79 mm ± 0.25 mm (0.110 in. ± 0.010 in.) Applications s Heat sink available for extended operation s Distributed power architectures s Negative logic remote on/off s Telecommunications Description The DC025 DC025 Dual-Output-Series Power Modules are dc-dc converters that operate over an input voltage range of 18 Vdc to 36 Vdc and provide two regulated outputs. These modules offer low noise levels with industrystandard pinouts in a small footprint. Each highly reliable and efficient unit features remote on/off and current limit. Each output is individually regulated by its own control circuit and has an independent overvoltage clamp. With standard outputs of +3.3 V, ±5 V, ±12 V, and ±15 V, the DC025 DC025 Dual-Output-Series Power Modules are flexible enough to provide modified standard units with any combination of output voltages from 2 V to 15 V. The DC025AJ-M DC025AJ-M, BK-M, and CL-M Power Modules are available with common output ground pins (pinout A); the DC025AA-M DC025AA-M, AB-M, AF-M, BB-M, and CC-M Power Modules are available with separate output ground pins (pinout B). * UL is a registered trademark of Underwriters Laboratories, Inc. CSA is a registered trademark of Canadian Standards Association. DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 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 device reliability. Parameter Input Voltage (continuous) I/O Isolation Voltage: dc Transient (1 minute) Operating Case Temperature Storage Temperature Symbol VI Min - Max 50 Unit V - - TC Tstg - - ­40 ­55 500 850 100 125 V V °C °C Electrical Specifications Note: Two pinouts are available for the DC025 DC025 Dual-Output-Series Power Modules. The DC025AJ-M DC025AJ-M, AB-M, BK-M, and CL-M Power Modules, which have both positive and negative outputs, have a common output ground pin (pinout A). The DC025AA-M DC025AA-M, AB-M, AF-M, BB-M, and CC-M Power Modules, which have dual positive outputs, have separate output ground pins (pinout B). See Outline Diagrams section. Unless otherwise indicated, specifications apply to all modules 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 36 V; IO = IO, max; see Figure 1.) Inrush Transient Input Reflected-ripple Current, Peak-to-Peak (5 Hz to 20 MHz, 12 µH source impedance; TC = 25 °C; see Figure 11 and Design Considerations section.) Input Ripple Rejection (120 Hz) Symbol VI II, max Min 18 - Typ 28 - Max 36 3.0 Unit Vdc A i2t - - - - 25 0.8 - 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 Tyco Electronics Corp. DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 Electrical Specifications (continued) Table 2. Output Specifications Parameter Output Voltage Set Point (VI = 28 V; IO = IO, max; TC = 25 °C) Device DC025AJ-M DC025AJ-M DC025BK-M DC025BK-M DC025CL-M DC025CL-M DC025AA-M DC025AA-M DC025AB-M DC025AB-M DC025AF-M DC025AF-M DC025BB-M DC025BB-M DC025CC-M DC025CC-M Output Voltage (Over all operating input voltage, resistive load, and temperature conditions until end of life. See Figure 13.) DC025AJ-M DC025AJ-M DC025BK-M DC025BK-M DC025CL-M DC025CL-M DC025AA-M DC025AA-M DC025AB-M DC025AB-M DC025AF-M DC025AF-M DC025BB-M DC025BB-M DC025CC-M DC025CC-M Output Regulation: Line (VI = 18 V to 36 V) Load (IO1 = IO, min to IO, max, IO2 = IO, max) Load (IO2 = IO, min to IO, max, IO1 = IO, max) Temperature (TC = ­40 °C to +100 °C) Tyco Electronics Corp. All All DC025AJ-M DC025AJ-M, AA-M, BK-M, BB-M, CL-M, CC-M, AB-M DC025AF-M DC025AF-M DC025AJ-M DC025AJ-M, AA-M, AF-M DC025BK-M DC025BK-M, BB-M DC025CL-M DC025CL-M, CC-M DC025AB-M DC025AB-M (5 V output) DC025AB-M DC025AB-M (12 V output) Symbol VO1, set VO2, set VO1, set VO2, set VO1, set VO2, set VO1, set VO2, set VO1, set VO2, set VO1, set VO2, set VO1, set VO2, set VO1, set VO2, set Typ Max Unit VO1 VO2 VO1 VO2 VO1 VO2 VO1 VO2 VO1 VO2 VO1 VO2 VO1 VO2 VO1 VO2 Min 4.90 ­4.90 11.76 ­11.76 14.70 ­14.70 4.90 4.90 4.90 11.76 4.90 3.23 11.76 11.76 14.70 14.70 4.80 ­4.80 11.40 ­11.40 14.25 ­14.25 4.80 4.80 4.80 11.40 4.80 3.16 11.40 11.40 14.25 14.25 5.0 ­5.0 12.0 ­12.0 15.0 ­15.0 5.0 5.0 5.0 12.0 5.0 3.3 12.0 12.0 15.0 15.0 - - - - - - - - - - - - - - - - 5.10 ­5.10 12.24 ­12.24 15.30 ­15.30 5.10 5.10 5.10 12.24 5.10 3.37 12.24 12.24 15.30 15.30 5.25 ­5.25 12.60 ­12.60 15.75 ­15.75 5.25 5.25 5.25 12.60 5.25 3.45 12.60 12.60 15.75 15.75 Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc Vdc - - - - - - 0.1 0.1 0.1 0.2 0.4 0.4 % % % - - - - 0.4 15 0.8 70 % mV - - 40 150 mV - - 40 190 mV - - 15 70 mV - - 40 150 mV 3 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 Electrical Specifications (continued) Table 2. Output Specifications (continued) Parameter 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.) Device Symbol Min Typ Max Unit DC025AJ-M DC025AJ-M, AA-M, AF-M DC025BK-M DC025BK-M, BB-M DC025CL-M DC025CL-M, CC-M DC025AB-M DC025AB-M (5 V output) DC025AB-M DC025AB-M (12 V output) DC025AJ-M DC025AJ-M, AA-M, AF-M DC025BK-M DC025BK-M, BB-M DC025CL-M DC025CL-M, CC-M DC025AB-M DC025AB-M (5 V output) DC025AB-M DC025AB-M (12 V output) DC025AJ-M DC025AJ-M, AA-M, AF-M DC025BK-M DC025BK-M, BB-M - - - 15 mVrms - - - - - - - - - 20 25 15 mVrms mVrms mVrms - - - 20 mVrms - - - 150 mVp-p - - - - - - - - - 200 250 150 mVp-p mVp-p mVp-p - - - 200 mVp-p IO1 IO2 IO1 IO2 IO1 IO2 IO1 IO2 - 0.20 0.20 0.10 0.10 0.08 0.08 0.20 0.10 - - - - - - - - - 3.7 2.50 2.50 1.04 1.04 0.83 0.83 2.50 1.04 6.5 A A A A A A A A A - - IO1 IO2 - - - - - - 1.5 1.3 3.7 1.5 3.5 2.9 2.7 6.5 2.9 7.0 A A A A A - - IO1 IO2 - - - - 75 68 75 79 79 1.0 1.0 3.5 1.0 78 75 79 82 82 3.0 3.0 7.0 3.0 - - - - - A A A A % % % % % DC025CL-M DC025CL-M, CC-M DC025AB-M DC025AB-M Output Current-limit Inception (VO = 90% of VO, nom; see Figure 2.) Output Short-circuit Current (VO = 250 mV) Efficiency (VI = 28 V; IO = IO, max; TC = 25 °C; see Figures 3 and 13.) 4 DC025AJ-M DC025AJ-M, AA-M, AF-M DC025BK-M DC025BK-M, BB-M DC025CL-M DC025CL-M, CC-M DC025AB-M DC025AB-M DC025AJ-M DC025AJ-M, AA-M, AF-M DC025BK-M DC025BK-M, BB-M DC025CL-M DC025CL-M, CC-M DC025AB-M DC025AB-M DC025AJ-M DC025AJ-M, AA-M DC025AF-M DC025AF-M DC025AB-M DC025AB-M DC025BK-M DC025BK-M, BB-M DC025CL-M DC025CL-M, CC-M Tyco Electronics Corp. DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 Electrical Specifications (continued) Table 2. Output Specifications (continued) Parameter Dynamic Response (IO/t = 1 A/10 µs, VI = 28 V, TA = 25 °C): Load Change from IO = 50% to 75% of IO, max (See Figures 7 to 9.): Peak Deviation Settling Time (VO < 10% peak deviation) Load Change from IO = 50% to 25% of IO, max (See Figures 4 to 6.): Peak Deviation Settling Time (VO < 10% peak deviation) Device Symbol Min Typ Max Unit DC025AJ-M DC025AJ-M, AA-M, AF-M DC025BK-M DC025BK-M, BB-M DC025CL-M DC025CL-M, CC-M DC025AB-M DC025AB-M (5 V output) DC025AB-M DC025AB-M (12 V output) All - - 160 - mV - - 250 - mV - - 250 - mV - - 160 - mV - - 250 - mV - - 3 - ms DC025AJ-M DC025AJ-M, AA-M, AF-M DC025BK-M DC025BK-M, BB-M DC025CL-M DC025CL-M, CC-M DC025AB-M DC025AB-M (5 V output) DC025AB-M DC025AB-M (12 V output) All - - 160 - mV - - 250 - mV - - 250 - mV - - 160 - mV - - 250 - mV - - 3 - ms Table 3. Isolation Specifications Parameter Isolation Capacitance Isolation Resistance Min - 10 Typ 1200 - Max - - Unit pF M General Specifications Parameter Calculated MTBF (IO = 80% of IO, max; TC = 40 °C) Weight Tyco Electronics Corp. Min - Typ 2,800,000 - Max 113 (4.0) Unit hours g (oz.) 5 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 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 (VI = 0 V to 36 V; open collector or equivalent compatible; signal referenced to VI(­) terminal. See Figures 10, 14, and Feature Descriptions.): DC025xx-M Positive Logic: Logic Low-Module Off Logic High-Module On DC025xx1-M Negative Logic: Logic Low-Module On Logic High-Module Off 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) Turn-on Time (IO = 80% of IO, max; VO within ±1% of steady state) Output Voltage Overshoot Output Overvoltage Clamp Device Symbol Min Typ Max Unit All Ion/off - - 1.0 mA All All Von/off Von/off 0 - - - 1.2 10 V V All Ion/off - - 50 µA All Von/off - - 1.2 V All - - 30 - ms All DC025AJ-M DC025AJ-M - VO1 VO2 VO1 VO2 VO1 VO2 VO1 VO2 VO1 VO2 VO1 VO2 VO1 VO2 VO1 VO2 - - - - - - - - - - - - - - - - - 0 5 % - - - - - - - - - - - - - - - - 7 ­7 16 ­16 20 ­20 7 7 7 16 7 5 16 16 20 20 V V V V V V V V V V V V V V V V VUVLO VUVLO - - 16 15.5 18 - V V DC025BK-M DC025BK-M DC025CL-M DC025CL-M DC025AA-M DC025AA-M DC025AB-M DC025AB-M DC025AF-M DC025AF-M DC025BB-M DC025BB-M DC025CC-M DC025CC-M Input Undervoltage Lockout: Module On Module Off 6 All All Tyco Electronics Corp. DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 Characteristic Curves 85 2.5 1.0 VI VI 2.0 0.8 II II 1.5 0.6 1.0 0.4 0.5 0.2 0 0.0 0 6 12 18 24 30 36 EFFICIENCY, INPUT CURRENT, II (A) 1.2 NORMALIZED OUTPUT VOLTAGE, VO1 OR VO2 3.0 (%) 80 75 70 65 5V 12 V 15 V 60 55 50 45 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 NORMALIZED OUTPUT CURRENT, IO1 = IO2 (A) INPUT VOLTAGE, VI (V) 8-1002(C) 8-992(C) 0.9 0.8 0.6 0.5 3.3 V 5V 12 V 15 V 0.4 50 mV 5.0 V 0.3 0.2 0.1 0.0 0.0 0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0 2.25 2.5 2.75 OUTPUT CURRENT NORMALIZED TO FULL LOAD, IO (A) 8-1001(C).a Figure 2. DC025 DC025 Dual-Output-Series Normalized Output Current vs. Normalized Output Voltage at VI = 28 V and TC = 25 °C OUTPUT CURRENT, IO (A) (0.5 A/div) VO1 OR VO2 NORMALIZED OUTPUT VOLTAGE, VO, nom (V) 1.1 1.0 0.7 Figure 3. DC025 DC025 Dual-Output-Series Efficiency vs. Normalized Output Currents at VI = 28 V and TC = 25 °C OUTPUT VOLTAGE, VO (V) (50 mV/div) Figure 1. DC025 DC025 Dual-Output-Series Input Current and Normalized Output Voltage vs. Input Voltage at Full Load and TC = 25 °C 1.0 A IO = 1 A/10 µs t 0.5 A 0.5 ms 0.5 A TIME, t (0.5 ms/div) 8-1019(C).a Figure 4. DC025 DC025 Dual-Output-Series Typical 5 V Output Voltage Response to a Step Load Change from 50% to 25% of IO, max at VI = VI, nom and TC = 25 °C Tyco Electronics Corp. 7 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (mV) (0.5 A/div) (50 mV/div) 100 mV 12.0 V 0.416 A IO = 1 A/10 µs t 0.208 A 0.2 A 1.5 A IO = 1 A/10 µs t 1.0 A 0.5 ms 0.5 A 8-1018(C) 8-1017(C) Figure 7. DC025 DC025 Dual-Output-Series Typical 5 V Output Voltage Response to a Step Load Change from 50% to 75% of IO, max at VI = VI, nom and TC = 25 °C OUTPUT VOLTAGE, VO (V) (0.1 V/div) Figure 5. DC025 DC025 Dual-Output-Series Typical 12 V Output Voltage Response to a Step Load Change from 50% to 25% of IO, max at VI = VI, nom and TC = 25 °C OUTPUT VOLTAGE, VO (V) (0.1 V/div) 5.0 V TIME, t (0.5 ms/div) TIME, t (0.5 ms/div) OUTPUT CURRENT, IO (A) (0.2 A/div) 50 mV 0.5 ms 100 mV 100 mV 12.0 V 15.0 V 0.333 A IO= 1 A/10 µs t 0.166 A 0.2 A 0.5 ms OUTPUT CURRENT, IO (A) (0.2 A/div) OUTPUT CURRENT, IO (A) (0.2 A/div) OUTPUT VOLTAGE, VO (V) (0.1 V/div) Characteristic Curves (continued) Data Sheet May 1998 0.624 A IO = 1 A/10 µs t 0.416 A 0.2 A 0.5 ms TIME, t (0.5 ms/div) TIME, t (0.5 ms/div) 8-1017(C).b 8-1017(C).a Figure 6. DC025 DC025 Dual-Output-Series Typical 15 V Output Voltage Response to a Step Load Change from 50% to 25% of IO, max at VI = VI, nom and TC = 25 °C 8 Figure 8. DC025 DC025 Dual-Output-Series Typical 12 V Output Voltage Response to a Step Load Change from 50% to 75% of IO, max at VI = VI, nom and TC = 25 °C Tyco Electronics Corp. Data Sheet May 1998 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Characteristic Curves (continued) Test Configurations OUTPUT CURRENT, IO (A) (0.2 A/div) OUTPUT VOLTAGE, VO (V) (0.1 V/div) TO OSCILLOSCOPE 100 mV LTEST V I (+) 12 µH 15.0 V BATTERY CS 220 µF IMPEDANCE < 0.1 @ 20 °C, 100 kHz V I (­) 0.500 A IO = 1 A/10 µs t 0.333 A 8-489(C).a Note: Measure input reflected-ripple current with a simulated source impedance (LTEST) of 12 µH. Capacitor CS offsets possible battery impedance. Current is measured at the input of the module. 0.2 A Figure 11. Input Reflected-Ripple Test Setup 0.5 ms TIME, t (0.5 ms/div) 8-1018(C).a NORMALIZED OUTPUT VOLTAGE, VO Figure 9. DC025 DC025 Dual-Output-Series Typical 15 V Output Voltage Response to a Step Load Change from 50% to 75% of IO, max at VI = VI, nom and TC = 25 °C VO, set REMOTE ON/OFF, Von/off (V) (2 V/div) 0V 2V 0V IO = 1 A/10 µs t 1 ms TIME, t (1 ms/div) 8-1020(C) Figure 10. DC025 DC025 Dual-Output-Series Typical Output Voltage Rise Time with Remote On/Off at VI = VI, nom, IO = 0.8 (IO, max), and TC = 25 °C Tyco Electronics Corp. 9 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 Test Configurations (continued) CONTACT AND DISTRIBUTION LOSSES VO1 VI(+) COPPER STRIP IO II SUPPLY VO1(+) LOAD COM LOAD 0.1 µF SCOPE RLOAD1 VO2 VI(­) CONTACT RESISTANCE COMM 8-863(C).a 0.1 µF SCOPE RLOAD2 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. VO2(­) 2 8-808(C) A. Pinout A (DC025AJ-M DC025AJ-M, BK-M, CL-M) Configuration Pinout A [ V OJ ­ COM ] I OJ = J=1 - x 100 [VI(+) ­ VI(­)]II - 2 COPPER STRIP VO1(+) Pinout B 0.1 µF SCOPE RLOAD1 [ V OJ ( + ) ­ V OJ ( ­ ) ] I OJ J=1 = - x 100 [VI(+) ­ VI(­)]II VO1(­) Figure 13. Output Voltage and Efficiency Measurement Test Setup VO2(+) 0.1 µF SCOPE RLOAD2 VO2(­) Design Considerations 8-809(C) B. Pinout B (DC025AA-M DC025AA-M, AB-M, AF-M, BB-M, CC-M) Configuration Note: Use a 0.1 µF ceramic capacitor. Scope measurement should be made by using a BNC socket. Position the load between 50 mm and 75 mm (2 in. and 3 in.) from the module. 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. A 33 µF electrolytic capacitor (ESR < 0.7 at 100 kHz) mounted close to the power module helps ensure stability of the unit. Figure 12. Output Noise Measurement Test Setup 10 Tyco Electronics Corp. Data Sheet May 1998 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Design Considerations (continued) VI(+) 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 UL-1950, CSA 22.2-950, EN60950 EN60950. VI(­) ­ VO1 LOAD Von/off COM + Ion/off LOAD ON/OFF VO2 For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input 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. Input/Output Voltage Reversal CAUTION: Applying a reverse voltage across the module output forward biases an internal diode. Attempting to start the module under this condition can damage the module. 8-754(C) Figure 14. Remote On/Off Implementation Output Overvoltage Clamp 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 clamp has a higher voltage set point than the primary loop (see Feature Specifications table). This provides a redundant voltage control that reduces the risk of output overvoltage. Current Limit Feature Descriptions 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, 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. 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. Grounding Considerations This code has a built-in isolated case ground pin. During a logic high, the maximum Von/off generated by the power module is 10 V. The maximum allowable leakage current of the switch at Von/off = 10 V is 50 µA. Tyco Electronics Corp. 11 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 Thermal Considerations WIND TUNNEL WALL MEASURE CASE TEMPERATURE AT CENTER OF UNIT AIRFLOW CONNECTORS TO LOADS, POWER SUPPLIES, AND DATALOGGER, 6.35 (0.25) TALL 203.2 (8.00) AIRFLOW 50.8 (2.00) 101.6 (4.00) AIR VELOCITY PROBE AMBIENT TEMPERATURE THERMOCOUPLE 12.7 (0.50) 203.2 (8.00) 9.7 (0.38) 19.1 (0.75) 8-866(C).a Note: Dimensions are in millimeters and (inches). Drawing is not to scale. Figure 15. Thermal Test Setup The DC025 DC025 Dual-Output-Series Power Modules are designed to operate in a variety of thermal environments. As with any electronic component, sufficient cooling must be provided to help ensure reliable operation of the unit. Heat-dissipating components inside the module are thermally coupled to the case. Heat is removed by conduction, convection, and radiation to the surrounding environment. 12 The thermal data presented is based on measurements taken in a wind tunnel. The test setup shown in Figure 15 was used to collect data. Actual performance can vary depending on the particular application environment. Tyco Electronics Corp. Data Sheet May 1998 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Thermal Considerations (continued) Air Velocity Basic Thermal Performance The air velocity required to maintain a desired maximum case temperature for a given power dissipation and ambient temperature can be calculated using Figure 21 and the following equation: The DC025 DC025 Dual-Output-Series Power Modules have separate power stages for each of the outputs. This means that the maximum operating temperature can be predicted quite closely by treating each output individually and then summing the results. Figures 16 through 21 are used to predict the safe operating condition for many different operating and environmental conditions. The method used to determine the maximum ambient temperature at a given air velocity is a four-step process. 1. Find the power dissipated for output 1 by using the appropriate chart (Figures 16 through 19) for a particular output condition (IO1). 2. Repeat step 1 for output 2 using Figures 16 through 19. 3. Find the total power dissipated by summing the power dissipated on each of the outputs: (PDOUT1 + PDOUT2) = PDtotal T C, max ­ T A P D total CA = -where CA is the thermal resistance from case-to-ambient air (°C/W), TC, max is the desired maximum case temperature (°C), TA is the ambient inlet temperature (°C), and PDtotal is the total power dissipated from the module (W). For example, to maintain a maximum case temperature of 85 °C with an ambient inlet temperature of 55 °C and a power dissipation of 6.7 W, the thermal resistance is: 85 °C ­ 55 °C CA - = 4.5 °C/W 6.7 W This corresponds to an air velocity greater than 0.46 ms­1 (90 fpm) in Figure 21. 4. Use the total power dissipated with Figure 20 to determine the maximum ambient temperature at different air velocities. For example, the DC025AJ-M DC025AJ-M power module operating at full load on both outputs with a 27 V input will have a power dissipation of 3.65 W (from Figure 17) for each output for a total of 7.3 W. Using Figure 20, it can be determined that the maximum ambient temperature at natural convection that the DC025AJ-M DC025AJ-M can operate at is approximately 54 °C. Keep in mind that these are approximations of the air temperature and velocity required to keep the case temperature below its maximum rating. The maximum case temperature at the point shown in Figure 15 must be kept at 100 °C or less. Tyco Electronics Corp. 13 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 Thermal Considerations (continued) 3.5 POWER DISSIPATION, PD (W) Air Velocity (continued) POWER DISSIPATION, P D (W) 3.5 3.0 2.5 2.0 1.5 2.5 VI = 36 V 2.0 1.5 1.0 VI = 27 V VI = 18 V 0.5 0.0 0.0 1.0 0.2 0.4 VI = 36 V VI = 24 V VI = 18 V 0.5 0.0 0.0 3.0 0.5 1.0 1.5 0.6 0.8 1.0 1.2 OUTPUT CURRENT, IO (A) 8-1128(C) 2.0 2.5 Figure 18. 12 V Output Power Dissipation vs. Output Current OUTPUT CURRENT, IO (A) 8-1841(C) Figure 16. 3.3 V Output Power Dissipation vs. Output Current POWER DISSIPATION, PD (W) 3.0 POWER DISSIPATION, PD (W) 4.5 4.0 3.5 3.0 VI = 36 V 2.5 2.0 1.5 VI = 27 V 1.0 VI = 18 V 0.5 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.5 1.0 1.5 0.9 8-1127(C) VI = 18 V 0.5 0.8 OUTPUT CURRENT, IO (A) VI = 27 V 1.0 0.0 0.0 2.0 0.0 0.0 1.5 VI = 36 V 2.5 2.0 2.5 Figure 19. 15 V Output Power Dissipation vs. Output Current OUTPUT CURRENT, IO (A) 8-1129(C) Figure 17. 5 V Output Power Dissipation vs. Output Current 14 Tyco Electronics Corp. DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Thermal Considerations (continued) Use of Heat Sinks and Cold Plates Air Velocity (continued) The DC025 DC025 Dual-Output-Series Power Modules case includes through-threaded M3 x 0.5 mounting holes allowing attachment of heat sinks or cold plates from either side of the module. The mounting torque must not exceed 0.56 N/m (5 in.-lb.). TOTAL POWER DISSIPATION, PD (W) Data Sheet May 1998 10.0 9.0 The following thermal model can be used to determine the required thermal resistance of the sink to provide the necessary cooling: 8.0 7.0 6.0 5.0 2.03 ms ­1 (400 ft./min.) 1.02 ms ­1 (200 ft./min.) 0.51 ms ­1 (100 ft./min.) 0.31 ms ­1 (60 ft./min.) NATURAL CONVECTION 4.0 3.0 2.0 1.0 CS 0.0 40 50 60 70 80 90 100 LOCAL AMBIENT TEMPERATURE, TA (°C) 8-988(C) Figure 20. Total Power Dissipation vs. Local Ambient Temperature and Air Velocity THERMAL RESISTANCE CASE TO AMBIENT (°C/W) 7.0 TA SA where PD is the power dissipated by the module, CS represents the interfacial contact resistance between the module and the sink, and SA is the sink-to-ambient thermal impedance (°C/W). For thermal greases or foils, a value of CS = 0.1 °C/W-0.3 °C/W is typical. The required SA is calculated from the following equation: TC ­ TA SA = - ­ CS P D total Note that this equation assumes that all dissipated power must be shed by the heat sink. Depending on the user-defined application environment, a more accurate model including heat transfer from the sides and bottom of the module can be used. This equation provides a conservative estimate in such instances. 6.0 5.0 4.0 3.0 For further information, refer to the Thermal Energy Management CC-, CW-, DC-, and DW-Series 25 W to 30 W Board-Mounted Power Modules Technical Note. 2.0 1.0 0.0 NAT 0.25 CONV (50) Ts Tc PD 0.51 0.76 (100) (150) 1.02 (200) 1.27 1.52 1.78 2.03 (250) (300) (350) (400) VELOCITY, ms ­1 (ft./min.) 8-989(C) Figure 21. Case-to-Ambient Thermal Resistance vs. Air Velocity Tyco Electronics Corp. 15 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 Outline Diagrams 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.). Pinout A (DC025AJ-M DC025AJ-M, BK-M, CL-M) Top View 71.1 (2.80) MAX PIN 1 INDICATOR Lucent 61.0 (2.40) MAX M3 DC-DC Power Module MADE IN USA Side View 0.51 (0.020) 12.7 (0.50) MAX 5.1 (0.20) Bottom View 1.02 (0.040) ± 0.08 (0.003) DIA TIN-PLATED BRASS, 8 PLACES STANDOFF, 4 PLACES 4.8 (0.19) 5.1 (0.20) 7.1 (0.28) 5 VO2(­) 4 20.32 (0.800) VI(+) 10.16 (0.400) 3 6 VI(­) 10.16 (0.400) 2 20.32 (0.800) 50.8 (2.00) 7 ON/OFF 20.32 (0.800) VO1(+) CASE 1 30.5 (1.20) COM 10.16 (0.400) MOUNTING INSERTS M3 x 0.5 THROUGH, 4 PLACES 8 NC 48.3 (1.90) 11.4 (0.45) 63.50 ± 0.38 (2.500 ± 0.015) 3.8 (0.15) 8-845(C).b 16 Tyco Electronics Corp. DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 Outline Diagrams (continued) 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.). Pinout B (DC025AA-M DC025AA-M, AB-M, AF-M, BB-M, CC-M) Top View 71.1 (2.80) MAX PIN 1 INDICATOR Lucent 61.0 (2.40) MAX M3 DC-DC Power Module MADE IN USA Side View 12.7 (0.50) MAX 0.51 (0.020) 5.1 (0.20) Bottom View 1.02 (0.040) ± 0.08 (0.003) DIA TIN-PLATED BRASS, 9 PLACES STANDOFF, 4 PLACES 4.8 (0.19) 5.1 (0.20) 7.1 (0.28) 5 VO2(­) 4 6 VO2(+) VI(+) 10.16 (0.400) 10.16 (0.400) 7 3 VI(­) VO1(­) CASE VO1(+) 10.16 (0.400) 20.32 (0.800) 50.8 (2.00) 10.16 (0.400) 2 8 1 30.5 (1.20) 20.32 (0.800) ON/OFF MOUNTING INSERTS M3 x 0.5 THROUGH, 4 PLACES NC 20.32 (0.800) 9 48.3 (1.90) 11.4 (0.45 ) 63.50 ± 0.38 (2.500 ± 0.015) 3.8 (0.15) 8-846(C).c Tyco Electronics Corp. 17 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 Recommended Hole Patterns Component-side footprint. Dimensions are in millimeters and (inches). Recommended hole size for pin: 1.27 mm (0.050 in.). Pinout A (DC025AJ-M DC025AJ-M, BK-M, CL-M) CASE OUTLINE M3 x 0.5 CLEARANCE HOLE, 4 PLACES (OPTIONAL) 1 8 2 7 3 6 30.5 (1.20) 20.32 (0.800) 10.16 (0.400) 61.0 (2.40) MAX 10.16 (0.400 ) 4 10.16 (0.400) 20.32 (0.800) 50.8 (2.00) 20.32 (0.800) 5 5.1 (0.20) 48.3 (1.90) 11.4 (0.45) 63.50 ± 0.38 (2.500 ± 0.015) 3.8 (0.15) 71.1 (2.80) MAX 8-845(C).b Pinout B (DC025AA-M DC025AA-M, AB-M, AF-M, BB-M, CC-M) CASE OUTLINE M3 x 0.5 CLEARANCE HOLE, 4 PLACES (OPTIONAL) 1 9 2 8 3 7 4 6 30.5 (1.20) 20.32 (0.800) 10.16 (0.400) 61.0 (2.40) MAX 20.32 (0.800) 10.16 (0.400) 10.16 (0.400) 50.8 (2.00) 10.16 (0.400) 20.32 (0.800) 5 5.1 (0.20 ) 48.3 (1.90) 11.4 (0.45) 63.50 ± 0.38 (2.500 ± 0.015) 3.8 (0.15) 71.1 (2.80) MAX 8-846(C).c 18 Tyco Electronics Corp. DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 Ordering Information Table 4. Ordering Information Table Input Voltage 18 V-36 V 18 V-36 V 18 V-36 V 18 V-36 V 18 V-36 V 18 V-36 V 18 V-36 V 18 V-36 V Output Voltage ± 5.0 V ± 12.0 V ± 15.0 V ± 5.0 V 5.0 V, 3.3 V 12.0 V, 12.0 V 15.0 V, 15.0 V 5.0 V, 12.0 V Output Power 25 W 25 W 25 W 25 W 21 W 25 W 25 W 25 W Remote On/Off Logic positive positive positive positive positive positive positive positive Device Code Pinout Comcode DC025AJ-M DC025AJ-M DC025BK-M DC025BK-M DC025CL-M DC025CL-M DC025AA-M DC025AA-M DC025AF-M DC025AF-M DC025BB-M DC025BB-M DC025CC-M DC025CC-M DC025AB-M DC025AB-M A A A B B B B B 107587347 107587388 107587404 TBD TBD 107587362 TBD 107587321 Optional features may be ordered using the device code suffixes shown below. To order more than one option, list suffixes in numerically descending order followed by the -M suffix, indicating metric (M3 x 0.5 heat sink hardware). The heat sinks designed for this package have an M prefix, i.e., MHSTxxx45 and MHSLxxx45 (see Thermal Energy Management CC-, CW-, DC-, and DW-Series 25 W to 30 W Board-Mounted Power Modules Technical Note). Table 5. Options Table Option Short pins: 2.79 mm ± 0.25 mm (0.110 in. ± 0.010 in.) Negative Remote on/off logic Device Code Suffix 8 1 Please contact your Tyco Electronics' Account Manager or Field Application Engineer for pricing and availability. Tyco Electronics Corp. 19 DC025 DC025 Dual-Output-Series Power Modules: 18 Vdc to 36 Vdc Input; 25 W Data Sheet May 1998 Tyco Electronics Power Systems, Inc. 3000 Skyline Drive, Mesquite, TX 75149, USA +1-800-526-7819 FAX: +1-888-315-5182 (Outside U.S.A.: +1-972-284-2626, FAX: +1-972-284-2900 http://power.tycoeleectronics.com Tyco Electronics Corportation 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. © 2001 Tyco Electronics Corporation, Harrisburg, PA. All International Rights Reserved. Printed in U.S.A. May 1998 DS97-422EPS DS97-422EPS (Replaces DS93-223EPS DS93-223EPS) Printed on Recycled Paper