MCOTS-C-28-05-HP

MCOTS-C-28-05-HP SYNQOR | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 13

Technical content

Product # MCOTS-C-28-05-HP P hone 1-888-567-9596 w ww.synqor.com D oc.# 005-0005278 Rev. 1 0 6/16/09 P age 1 16-40V 16-50V 5V 40A 90% @ 20A / 87% @ 40A Continuous Input Transient Input Output Output Efficiency Operational Features

• High effi ciency, 87% at ful l rated l oad current
• Operating i nput vol tage range: 16-40 V
• Fixed frequency swi tching provi des predi ctable EM I
• No mini mum l oad requi rement Protection Features
• Input under-vol tage l ockout
• Output current l imit and short circuit protecti on
• Active back bias l imit
• Output over-vol tage protecti on
• Thermal shutdown Mechanical Features
• Industry standard half -brick pin-out confi guration (63.14mm x 60.6mm x 13mm)
• Total wei ght: 5 oz (142 g) Control Features
• On/Off control referenced to i nput si de
• Remote sense for the output vol tage
• Output v oltage tri m r ange of -20%, + 10% Safety Features
• 2250 V, 30 MW i nput-to-output i solation
• Certified 60950-1 r equirements f or basi c i nsulation (see Standar ds and Q ualifications page)
• CE M arked
• RoHS compl iant Screening/Qualification
• AS9100 and ISO 9100: 2000 certi fied f acility
• Qualification consi stent wi th M IL-STD-883
• Avialable wi th standar d or mili tary gr ade scr eening
• Pre-cap i nspection per IPC -610, Cl ass III
• Temperature cy cling per M IL-STD-883, M ethod 1010, Condition B , 10 cy cles
• Burn-In at 100°C basepl ate temper ature
• Final visual i nspection per M IL-STD-2008
• Full component tr aceability The M ilQor s eries o f M IL-COTS D C/DC converters brin gs SynQor’s f ield p roven h igh-efficiency s ynchronous rectification t echnology t o t he M ilitary/Aerospace industry. S ynQor’s r uggedized e ncased p ackaging approach e nsures s urvivability i n d emanding environments. Compatible wi th the industry standar d format, these con verters oper ate at a fix ed f requency, and f ollow conserv ative component der ating guidel ines. They ar e designed and manuf actured to comply wi th a wide r ange of mili tary standar ds Full Power Operation: -55°C to +100°C Mil-COTS MILITARY COTS DC/DC CONVERTER Designed and Manufactured in the USA advanced publication advanced publication advanced publication

Product # MCOTS-C-28-05-HP P hone 1-888-567-9596 w ww.synqor.com D oc.# 005-0005278 Rev. 1 0 6/16/09 P age 2 Output: Current: 40A MCOTS-C-28-05-HP Technical Specification BLOCK DIAGRAM TYPICAL CONNECTION DIAGRAM Vin External Input Filter Trim Vin(+) Iload Cload Vout(+) Rtrim-up or Rtrim-down Vsense(+) ON/OFF Vin(_) Vout(_) Vsense(_) Electrolytic advanced publication advanced publication advanced publication

Product # MCOTS-C-28-05-HP P hone 1-888-567-9596 w ww.synqor.com D oc.# 005-0005278 Rev. 1 0 6/16/09 P age 3 Output: Current: 40A MCOTS-C-28-05-HP Technical Specification MCOTS-C-28-05-HP ELECTRICAL CHARACTERISTICS Ta = 25 °C, airflow rate = 300 LFM, Vin = dc unless otherwise noted; full operating temperature range is -40 °C to +100 °C baseplate temperature with appropriate power derating. Specifications subject to change without notice. Parameter Min. Typ. Max. Units Notes & Conditions ABSOLUTE MAXIMUM RATINGS Input Voltage Non-Operating 60 V Continuous Operating 40 V Continuous Operating Transient Protection 50 V 1 s transient, square wave Isolation Voltage Input to Output 2250 V dc Input to Base-Plate 2250 V dc Output to Base-Plate 2250 V dc Operating Temperature -55 100 °C Baseplate temperature Storage Temperature -65 135 °C Voltage at ON/OFF Input P+++in -2 18 V INPUT CHARACTERISTICS Operating Input Voltage Range 16 28 40 V 50V transient for 1 s Input Under-Voltage Lockout Turn-On Voltage Threshold 14.8 15.1 15.4 V Turn-Off Voltage Threshold 13.8 14.1 14.4 V Lockout Voltage Hysteresis 1.0 V Recommended External Input Capacitance 100 µF Typical ESR 0.1-0.2 Ω Input Filter Component Values (L\\C) 1.1\\13.2 µH\\µF Internal values; see Figure E Maximum Input Current 20.7 A Vin min; trim up; in current limit No-Load Input Current 95 120 mA Disabled Input Current 1.8 4 mA Response to Input Transient 0.35 V See Figure 6 Input Terminal Ripple Current 320 mA RMS Recommended Input Fuse TBD A Fast acting external fuse recommended OUTPUT CHARACTERISTICS Output Voltage Set Point 4.95 5 5.05 V Output Voltage Regulation Over Line ±0.1 ±0.3 % Over Load ±0.1 ±0.3 % Over Temperature -75 75 mV Total Output Voltage Range 4.875 5.125 V Over sample, line, load, temperature & life Output Voltage Ripple and Noise 20 MHz bandwidth; see Note 1 Peak-to-Peak 55 110 mV Full load RMS 12 20 mV Full load Operating Output Current Range 0 40 A Subject to thermal derating Output DC Current-Limit Inception 44 48 52 A Output voltage 10% Low Output DC Current-Limit Shutdown Voltage 2.3 V Back-Drive Current Limit while Enabled 0.53 A Negative current drawn from output Back-Drive Current Limit while Disabled 0 0.4 50 mA Negative current drawn from output Maximum Output Capacitance 8000 µF Vout nominal at full load (resistive load) Output Voltage during Load Current Transient Step Change in Output Current (0.1 A/µs) 150 mV 50% to 75% to 50% Iout max Settling Time 500 µs To within 1% Vout nom Output Voltage Trim Range -20 +10 % Across Pins 8 & 4; Common Figures 3-5; see Note 2 Output Voltage Remote Sense Range +10 % Across Pins 8 & 4 Output Over-Voltage Protection 5.85 6.1 6.35 V Over full temp range EFFICIENCY 100% Load 87 % See Figure 1 for efficiency curve 50% Load 90 % See Figure 1 for efficiency curve advanced publication advanced publication advanced publication

Product # MCOTS-C-28-05-HP P hone 1-888-567-9596 w ww.synqor.com D oc.# 005-0005278 Rev. 1 0 6/16/09 P age 4 Output: Current: 40A MCOTS-C-28-05-HP Technical Specification MCOTS-C-28-05-HP ELECTRICAL CHARACTERISTICS Tb = 25 °C, Vin = 28Vdc unless otherwise noted; full operating temperature range is -55 °C to +100 °C baseplate temperature with appropriate power derating. Specifications subject to change without notice. DYNAMIC CHARACTERISTICS Turn-On Transient Turn-On Time 10 ms Full load, Vout=90% nom. Start-Up Inhibit Time 200 230 250 ms -40 °C to +125 °C; Figure E Output Voltage Overshoot 0 % Maximum Output Capacitance ISOLATION CHARACTERISTICS Isolation Voltage (dielectric strength) See Absolute Maximum Ratings Isolation Resistance 30 MΩ Isolation Capacitance (input to output) 1000 pF See Note 2 TEMPERATURE LIMITS FOR POWER DERATING CURVES Semiconductor Junction Temperature 125 °C Package rated to 150 °C Board Temperature 125 °C UL r ated max operating temp 130 °C Transformer Temperature 125 °C Maximum Baseplate Temperature, Tb 100 °C FEATURE CHARACTERISTICS Switching Frequency 255 275 295 kHz For both input and isolation stage ON/OFF Control Off-State Voltage 2.4 18 V On-State Voltage -2 0.8 ON/OFF Control Application notes Figures A & B Pull-Up Voltage 5 V Pull-Up Resistance 50 kΩ Over-Temperature Shutdown OTP Trip Point 125 °C Average PCB Temperature Over-Temperature Shutdown Restart Hysteresis 10 °C RELIABILITY CHARACTERISTICS Calculated MTBF (Telcordia) TR-NWT-000332 TBD 106 Hrs. 80% load, 200LFM, 40 °C Ta Calculated MTBF (MIL-217) MIL-HDBK-217F TBD 106 Hrs. 80% load, 200LFM, 40 °C Ta Field Demonstrated MTBF 106 Hrs. See our website for details Note 1: Output is terminated with 1 µF ceramic and 15 µF low-ESR tantalum capacitors. For applications requiring reduced output voltage ripple and noise, consult SynQor applications support (e-mail: support@synqor.com) Note 2: Higher values of isolation capacitance can be added external to the module. advanced publication advanced publication

Product # MCOTS-C-28-05-HP P hone 1-888-567-9596 w ww.synqor.com D oc.# 005-0005278 Rev. 1 0 6/16/09 P age 5 Output: Current: 40A MCOTS-C-28-05-HP Technical Specification 25 40 55 70 85 Ambient Air Temperature (°C) Iout (A) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 25 40 55 70 85 Ambient Air Temperature (°C) Iout (A) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) 0 5 10 15 20 25 30 35 40 Load Current (A) Power Dissipation (W)

16 Vin

28 Vin

40 Vin

Load Current (A) Efficiency (%) Figure 1: Efficiency at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25 °C. Figure 2: Power dissipation at nominal output voltage vs. load current for minimum, nominal, and maximum input voltage at 25 °C. Figure 3: Encased converter (without heatsink) max. output power derating vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows across the converter from pin 3 to pin 1 (nominal input voltage). Figure 4: Encased converter (with 1/4” heatsink) max. output power derating vs. ambient air temperature for airflow rates of 100 LFM through 400 LFM. Air flows across the converter from pin 3 to pin 1 (nominal input voltage). Figure 5: Output voltage response to step-change in load current (50%-75%- 50% of Iout(max); dI/dt = 0.1 A/µs). Load cap: 1 µF ceramic and 15 µF tantalum capacitors. Ch 1: Vout (200mV/div), Ch 2: Iout (20A/div). Figure 6: Output voltage response to step-change in input voltage (250 V /ms). Load cap: 100 µF, electrolytic output capacitance. Ch 1: Vout (500mV/div), Ch 2: Vin (20V/div). advanced publication advanced publication

Product # MCOTS-C-28-05-HP P hone 1-888-567-9596 w ww.synqor.com D oc.# 005-0005278 Rev. 1 0 6/16/09 P age 7 Output: Current: 40A MCOTS-C-28-05-HP Technical Specification Test Name Details #Tested (# Failed) Consistent with MIL-STD-883F Method Consistent with MIL- STD-883F Method 5005 Life Testing Visual, mechanical and electrical test- ing before, during and after 1000 hour burn-in @ full load (0) Method 1005.8 Shock-Vibration Visual, mechanical and electrical test- ing before, during and after shock and vibration tests (0) MIL-STD-202, Method 1 Humidity +85˚C, 85%RH, 1000 hours, 2 min- utes on/6 hours off (0) Method 1004.7 Temperature Cycling 500 cycles of -40˚C to +100˚C (30 minute dwell at each temperature (0) Method 1010.8 Condition A Solderability 15 pins 15 (0) Method 2003 DMT -65˚C to +110˚C across full lne and load specificatonsin 5˚C steps (0) MIL-COTS Qualification MIL-COTS Screening Screening Process Description Standard Military (MIL Grade) Baseplate Operating Temperature -55˚C to +100˚C -55˚C to +100˚C Storage Temperature -65˚C to +135˚C -65˚C to +135˚C Pre-Cap inspection IPC-610, Class III ● ● Temperature Cyclling Method 1010, Condition B,

10 Cycles ●

Burn-In 100˚C Baseplate 12 Hours 96 Hours Final Electrical Test 100% 25˚C -55˚C, +25˚C, +100˚C Final Visual Inspection MIL-STD-2008 ● ● advanced publication advanced publication

Product # MCOTS-C-28-05-HP P hone 1-888-567-9596 w ww.synqor.com D oc.# 005-0005278 Rev. 1 0 6/16/09 P age 8 Output: Current: 40A MCOTS-C-28-05-HP Technical Specification Figure A: Various circuits for driving the ON/OFF pin. Figure B: Internal ON/OFF pin circuitry BASIC OPERATION AND FEATURES This MIL-COTS converter series uses a two-stage power conversion topology. The first stage is a buck-converter that keeps the output voltage constant over variations in line, load, and temperature. The second stage uses a transformer to provide the functions of input/output isolation and voltage step- up or step-down to achieve the output voltage required. Both the first stage and the second stage switch at a fixed frequency for predictable EMI performance. Rectification of the transformer’s output is accomplished with synchronous rectifiers. These devices, which are MOSFETs with a very low on-state resistance, dissipate far less energy than Schottky diodes. This is the primary reason that the converter has such high efficiency, even at very low output voltages and very high output currents. These converters are offered totally encased to withstand harsh environments and thermally demanding applications. Dissipation throughout the converter is so low that it does not require a heatsink for operation in many applications; however, adding a heatsink provides improved thermal derating performance in extreme situations. This series of converters use the industry standard footprint and pin-out configuration. CONTROL FEATURES REMOTE ON/OFF (Pin 2 ): The ON/OFF input, Pin 2, permits the user to control when the converter is on or off. This input is referenced to the return terminal of the input bus, Vin(-). The ON/OFF signal is active low (meaning that a low turns the converter on). Figure A details four possible circuits for driving the ON/OFF pin. Figure B is a detailed look of the internal ON/ OFF circuitry. REMOTE SENSE(+ ) (Pins 7 and 5) : The SENSE(+) inputs correct for voltage drops along the conductors that connect the converter’s output pins to the load. Pin 7 should be connected to Vout(+) and Pin 5 should be connected to Vout(-) at the point on the board where regulation is desired. A remote connection at the load can adjust for a voltage drop only as large as that specified in this datasheet, that is [Vout(+) - Vout(-)] – [Vsense(+) - Vsense(-)] < Sense Range % x Vout Pins 7 and 5 must be connected for proper regulation of the output voltage. If these connections are not made, the converter will deliver an output voltage that is slightly higher than its specified value. Note: the output over-voltage protection circuit senses the voltage across the output (pins 8 and 4) to determine when it should trigger, not the voltage across the converter’s sense leads (pins 7 and 5). Therefore, the resistive drop on the board should be small enough so that output OVP does not trigger, even during load transients. Open Collector Enable Circuit Remote Enable Circuit Direct Logic Drive Negative Logic (Permanently Enabled) ON/OFF Vin(_) ON/OFF ON/OFF Vin(_) ON/OFF TTL/ CMOS Vin(_) Vin(_) TTL 50k 50k ON/OFF Vin(_) 100pF OUTPUT VOLTAGE TRIM (Pin 6) : The TRIM input permits the user to adjust the output voltage across the sense leads up or down according to the trim range specifications. To decrease the output voltage, the user should connect a resistor between Pin 6 and Pin 5 (SENSE(-) input). For a desired decrease of the nominal output voltage, the value of the resistor should be Rtrim-down = 511 )- 10.22 (kW)∆% where ∆% = Vnominal – Vdesired x 100% V nominal To increase the output voltage, the user should connect a resistor between Pin 6 and Pin 7 (SENSE(+) input). For a desired increase of the nominal output voltage, the value of the resistor should be Trim graphs show the relationship between the trim resistor value and Rtrim-up and Rtrim-down, showing the total range the output voltage can be trimmed up or down. Note: the TRIM feature does not affect the voltage at which the output over-voltage protection circuit is triggered. Trimming the output voltage too high may cause the over-voltage protection circuit to engage, particularly during transients. It is not necessary for the user to add capacitance at the Trim pin. The node is internally bypassed to eliminate noise. Total DC Variation of V OUT: For the converter to meet its full specifications, the maximum variation of the dc value of V OUT, due to both trimming and remote load voltage drops, should not be greater than that specified for the output voltage trim range. PROTECTION FEATURES Input Under-Voltage Lockout : The converter is designed to turn off when the input voltage is too low, helping avoid an input system instability problem, described in more detail in the application note titled “ Input System Instability ” on our website. The lockout circuitry is a comparator with dc hysteresis. When the input voltage is rising, it must exceed the typical Turn- On Voltage Threshold value (listed on the specifications page) before the converter will turn on. Once the converter is on, the input voltage must fall below the typical Turn-Off Voltage Threshold value before the converter will turn off. Output Current Limit : The maximum current limit remains constant as the output voltage drops. However, once the impedance of the load across the output is small enough to make the output voltage drop below the specified Output DC Current- Limit Shutdown Voltage, the converter turns off. The converter then enters a “hiccup mode” where it repeatedly turns on and off at a 5 Hz (nominal) frequency with a 5% duty cycle until the short circuit condition is removed. This prevents excessive heating of the converter or the load board. Output Over-Voltage Limit : If the voltage across the output pins exceeds the Output Over-Voltage Protection threshold, the converter will immediately stop switching. This prevents damage to the load circuit due to 1) excessive series resistance in output current path from converter output pins to sense point, 2) a release of a short-circuit condition, or 3) a release of a current limit condition. Load capacitance determines exactly how high the output voltage will rise in response to these conditions. After 200 ms the converter will automatically restart. Over-Temperature Shutdown : A temperature sensor on the converter senses the average temperature of the module. The thermal shutdown circuit is designed to turn the converter off when the temperature at the sensed location reaches the Over-Temperature Shutdown value. It will allow the converter to turn on again when the temperature of the sensed location falls by the amount of the Over-Temperature Shutdown Restart Hysteresis value. Rtrim-up (kW) where Vout = Nominal Output Voltage 511 _ 10.22 5.11VOUT x (100+∆%) 1.225∆% ∆% )= ( _ advanced publication advanced publication

Product # MCOTS-C-28-05-HP P hone 1-888-567-9596 w ww.synqor.com D oc.# 005-0005278 Rev. 1 0 6/16/09 P age 9 Output: Current: 40A MCOTS-C-28-05-HP Technical Specification OUTPUT VOLTAGE TRIM (Pin 6) : The TRIM input permits the user to adjust the output voltage across the sense leads up or down according to the trim range specifications. To decrease the output voltage, the user should connect a resistor between Pin 6 and Pin 5 (SENSE(-) input). For a desired decrease of the nominal output voltage, the value of the resistor should be Rtrim-down = 511 )- 10.22 (kW)∆% where ∆% = Vnominal – Vdesired x 100% V nominal To increase the output voltage, the user should connect a resistor between Pin 6 and Pin 7 (SENSE(+) input). For a desired increase of the nominal output voltage, the value of the resistor should be Trim graphs show the relationship between the trim resistor value and Rtrim-up and Rtrim-down, showing the total range the output voltage can be trimmed up or down. Note: the TRIM feature does not affect the voltage at which the output over-voltage protection circuit is triggered. Trimming the output voltage too high may cause the over-voltage protection circuit to engage, particularly during transients. It is not necessary for the user to add capacitance at the Trim pin. The node is internally bypassed to eliminate noise. Total DC Variation of V OUT: For the converter to meet its full specifications, the maximum variation of the dc value of V OUT, due to both trimming and remote load voltage drops, should not be greater than that specified for the output voltage trim range. PROTECTION FEATURES Input Under-Voltage Lockout : The converter is designed to turn off when the input voltage is too low, helping avoid an input system instability problem, described in more detail in the application note titled “ Input System Instability ” on our website. The lockout circuitry is a comparator with dc hysteresis. When the input voltage is rising, it must exceed the typical Turn- On Voltage Threshold value (listed on the specifications page) before the converter will turn on. Once the converter is on, the input voltage must fall below the typical Turn-Off Voltage Threshold value before the converter will turn off. Output Current Limit : The maximum current limit remains constant as the output voltage drops. However, once the impedance of the load across the output is small enough to make the output voltage drop below the specified Output DC Current- Limit Shutdown Voltage, the converter turns off. The converter then enters a “hiccup mode” where it repeatedly turns on and off at a 5 Hz (nominal) frequency with a 5% duty cycle until the short circuit condition is removed. This prevents excessive heating of the converter or the load board. Output Over-Voltage Limit : If the voltage across the output pins exceeds the Output Over-Voltage Protection threshold, the converter will immediately stop switching. This prevents damage to the load circuit due to 1) excessive series resistance in output current path from converter output pins to sense point, 2) a release of a short-circuit condition, or 3) a release of a current limit condition. Load capacitance determines exactly how high the output voltage will rise in response to these conditions. After 200 ms the converter will automatically restart. Over-Temperature Shutdown : A temperature sensor on the converter senses the average temperature of the module. The thermal shutdown circuit is designed to turn the converter off when the temperature at the sensed location reaches the Over-Temperature Shutdown value. It will allow the converter to turn on again when the temperature of the sensed location falls by the amount of the Over-Temperature Shutdown Restart Hysteresis value. Rtrim-up (kW) where Vout = Nominal Output Voltage 511 _ 10.22 5.11VOUT x (100+∆%) 1.225∆% ∆% )= ( _ advanced publication advanced publication

Product # MCOTS-C-28-05-HP P hone 1-888-567-9596 w ww.synqor.com D oc.# 005-0005278 Rev. 1 0 6/16/09 P age 10 Output: Current: 40A MCOTS-C-28-05-HP Technical Specification APPLICATION CONSIDERATIONS Figure C: Typical application circuit (negative logic unit, permanently enabled). Figure D: Internal Input Filter Diagram (component values listed on the specifications page) . Vin External Input Filter Trim Vin(+) Iload Cload Vout(+) Rtrim-up or Rtrim-down Vsense(+) ON/OFF Vin(_) Vout(_) Vsense(_) Electrolytic Capacitor C2C1 Lin Vin(+) Vin(_) Regulation Stage Isolation Stage Input System Instability: This condition can occur because any dc-dc converter appears incrementally as a negative resistance load. A detailed application note titled “Input System Instability” is available on the SynQor website which provides an understanding of why this instability arises, and shows the preferred solution for correcting it. Application Circuits: Figure C provides a typical circuit diagram which details the input filtering and voltage trimming. Input Filtering and External Capacitance: Figure D provides a diagram showing the internal input filter components. This filter dramatically reduces input terminal ripple current, which otherwise could exceed the rating of an external electrolytic input capacitor. The recommended external input capacitance is specified in the Input Characteristics section on the

Electrical Characteristics

page. More detailed information is available in the application note titled “EMI Characteristics” on the SynQor website. advanced publication advanced publication

Product # MCOTS-C-28-05-HP P hone 1-888-567-9596 w ww.synqor.com D oc.# 005-0005278 Rev. 1 0 6/16/09 P age 11 Output: Current: 40A MCOTS-C-28-05-HP Technical Specification Startup Inhibit Period: The Startup Inhibit Period ensures that the converter will remain off for approximately 200 ms when it is shut down for any reason. When an output short is present, this generates a 5 Hz “hiccup mode,” which prevents the converter from overheating. In all, there are seven ways that the converter can be shut down, initiating a Startup Inhibit Period:

• Input Under-Voltage Lockout
• Input Over-Voltage Shutdown
• Output Over-Voltage Protection
• Over Temperature Shutdown
• Current Limit
• Short Circuit Protection
• Turned off by the ON/OFF input Figure E shows three turn-on scenarios, where a Startup Inhibit Period is initiated at t 0, t1, and t2: Before time t0, when the input voltage is below the UVL threshold, the unit is disabled by the Input Under-Voltage Lockout feature. When the input voltage rises above the UVL threshold, the Input Under-Voltage Lockout is released, and a Startup Inhibit Period is initiated. At the end of this delay, the ON/OFF pin is evaluated, and since it is active, the unit turns on. At time t 1, the unit is disabled by the ON/OFF pin, and it cannot be enabled again until the Startup Inhibit Period has elapsed. When the ON/OFF pin goes high after t 2, the Startup Inhibit Period has elapsed, and the output turns on within the typical Turn-On Time. Thermal Considerations: The maximum operating base-plate temperature, TB, is 100 ºC. As long as the user’s thermal system keeps TB < 100 ºC, the converter can deliver its full rated power. A power derating curve can be calculated for any heatsink that is attached to the base-plate of the converter. It is only necessary to determine the thermal resistance, R THBA, of the chosen heatsink between the base-plate and the ambient air for a given airflow rate. This information is usually available from the heatsink vendor. The following formula can the be used to determine the maximum power the converter can dissipate for a given thermal condition if its base-plate is to be no higher than 100 ºC. P max = 100 ºC - TA diss RTHBA This value of power dissipation can then be used in conjunction with the data shown in Figure 2 to determine the maximum load current (and power) that the converter can deliver in the given thermal condition. For convenience, power derating curves for an encased converter without a heatsink and with a typical heatsink are provided for each output voltage. Figure E: Startup Inhibit Period (turn-on time not to scale) Under-Voltage Lockout Turn- On Threshold ON/OFF (neg logic) Vout Vin 200ms 200ms 200ms (typical start-up inhibit period) t0 t1 t2 t 9ms (typical turn on time) ON ON ONOFF OFF advanced publication advanced publication

Product # MCOTS-C-28-05-HP P hone 1-888-567-9596 w ww.synqor.com D oc.# 005-0005278 Rev. 1 0 6/16/09 P age 12 Output: Current: 40A MCOTS-C-28-05-HP Technical Specification NOTES 1) Applied torque per screw should not exceed 6in-lb. (0.7 Nm). 2) Baseplate flatness tolerance is 0.004" (.10 mm) TIR for surface. 3) Pins 1-3, 5-7 are 0.040” (1.02mm) diameter, with 0.080” (2.03mm) diameter standoff shoulders. standoff shoulders 5) All Pins: Material: Copper Alloy Finish: Matte Tin over Nickel plate 6) Undimensioned Components are shown for visual reference only 7) Weight: 4.9oz (142g) 8) Threaded or Non-Threaded options available 9) All dimensions in inches (mm) Tolerances: PIN DESIGNATIONS Pin Name Function

1 Vin(+) Positive input voltage

2 ON/OFF

TTL input to turn converter on and off, referenced to Vin(–), with internal pull up.

3 Vin(–) Negative input voltage

4 Vout(–) Negative output voltage

5 SENSE(–) Negative remote sense 1

6 TRIM Output voltage trim 2

7 SENSE(+) Positive remote sense 3

8 Vout(+) Positive output voltage

Notes: 1) SENSE(–) should be connected to Vout(–) either remotely or at the converter. 2) Leave TRIM pin open for nominal output voltage. 3) SENSE(+) should be connected to Vout(+) either remotely or at the converter. 1.90 [ 48,3 ] .400 [ 10,16 ] 1.400 [ 35,56 ] .400 [ 10,16 ] .700 [ 17,78 ] 1.000 [ 25,4 ] 1.400 [ 35,56 ] 2.386 ±.020 [ 60,6 ±0,5 ] .233 ±.020 [ 5,92 ±0,5 ] 1.90 [ 48,3 ] .243 ±.020 [ 6,17 ±0,5 ] .243 ±.020 [ 6,17 ±0,5] 2.00 [ 50,8 ] +.002.512 -.005 +0,0513[ -0,12 ] OVERALL HEIGHT +.007.027 -.010 +0,170,69[ -0,25 ] BOTTOMSIDE CLEARANCE .163 [ 4,14 ] 1 2 3 45678 SIDE VIEW TOP VIEW THRU HOLE M3 (SEE NOTE 8) STANDOFFS (4) Mechanical Drawing advanced publication

Product # MCOTS-C-28-05-HP P hone 1-888-567-9596 w ww.synqor.com D oc.# 005-0005278 Rev. 1 0 6/16/09 P age 13 Output: Current: 40A MCOTS-C-28-05-HP Technical Specification Warranty SynQor offers a two (2) year limited warranty. Complete warranty information is listed on our website or is available upon request from SynQor. Information furnish ed by SynQor is believed to be accurate and reliable. However, no responsibility is assumed by SynQor for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SynQor. Contact SynQor for further information: Phone: 978-849-0600 Toll Free: 888-567-9596 Fax: 978-849-0602 E-mail: mqnbofae@synqor.com Web: www.synqor.com Address: 155 Swanson Road Boxborough, MA 01719 USA PATENTS SynQor hol ds the fol lowing patents, one or more of whi ch mi ght appl y to thi s product : 5,999,417 6,222,742 6,545,890 6,577,109 6,594,159 6,731,520 6,894,468 6,896,526 6,927,987 7,050,309 7,072,190 7,085,146 7,119,524 7,269,034 7,272,021 7,272,023 Family Product Input Voltage Output Voltage Package Heatsink Option Screening Level MCOTS C: Converter F: Filter 28: 16-40V 48: 34-75V 270: 155-400V 1R2: 1.2V 1R5: 1.5V 1R8: 1.8V 2R5: 2.5V 3R3: 3.3V 05: 5V 07: 7V 12: 12V 15: 15V 24: 24V 28: 28V 40: 40V 48: 48V P: Passive T: Active FT: Full Brick HP: Half Brick Peta HZ: Half Brick Zeta QT: Quarter Brick EG: Eighth Brick SM: Sixteenth Brick N: Normal F: Flanged S: Standard M: M-Grade Example MCOTS-C-28-05-HP-N-S Application Notes A v ariety o f a pplication n otes a nd t echnical w hite p apers c an be d ownloaded i n p df f ormat f rom o ur w ebsite. RoHS Compliance: T he E U l ed R oHS ( Restriction o f H azardous Substances) D irective b ans t he u se o f L ead, C admium, H exavalent Chromium, M ercury, P olybrominated B iphenyls ( PBB), a nd Polybrominated D iphenyl E ther ( PBDE) i n E lectrical a nd E lectronic Equipment. T his S ynQor p roduct i s 6 /6 R oHS c ompliant. F or more i nformation p lease r efer t o S ynQor’s R oHS a ddendum available a t o ur RoHS C ompliance / L ead F ree I nitiative w eb p age or e -mail u s a t rohs@synqor.com. Ordering Information/ Part Numbering advanced publication