AQ027W48V018V15AN AQ027W48V018V15AN AQ027W48V018V15AN 4 48 8V V 1 15 5A A 1 1..8 8V V D DC C- -D DC C C Co on nv ve er rt te er r in out out in out out H Hiig gh h E Ef ff fiic ciie en nc cy y,, IIs so olla at te ed d Q Qu ua ar rt te er r B Br riic ck k Features Features Features · Very high efficiency: 88.5% · Wide input voltage range (36 to 75Vdc) · Total weight: 34g. (1.2oz.) · Low profile, industry standard footprint and pin out: 2.3" x 1.45" x 0.36" (58.4mm x 36.8mm x 9.35mm) · Remote ON/OFF · Output voltage trim · Remote sense · Fixed Frequency (Input-Output ripple 400 KHz) · Under voltage lockout (UVLO) – auto recover · Over voltage protection – auto recover · Over current protection – auto recover · Over temperature protection – auto recover · Operating temperature -40/+100°C · Input to Output Isolation at 2000Vdc,10M: · CSA/US, CSA, TUV and KEMA Certified · ISO 9001 Certified manufacturing processes Product Highlights Product Highlights Product Highlights · The AQ Family of dc-dc converters is Ault’s solution for next generation, cutting-edge board applications. · Synchronous rectification uses MOSFET instead of Schottky diodes providing extreme reduction in heat generation, boosting efficiency, eliminating the need for a heat sink and increased reliability. · Low profile (0.36”), open frame construction allows smaller card pitch and improves system ventilation. · Fixed switching frequency provides predictable EMI characteristics. 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ027W±48V±1.8V High Efficiency DC-DC Converter 0.06 (2x) (1.5 (2x)) (58.42) 0.04 (6x) (3.68) (50.80) (1 (6x)) 1 8 7 2 6 5 3 4 BOTTOM VIEW SIDE VIEW 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com (36.83) 0.366 0.16 (9.30) (4) (10.8) (7.62) (7.62) 0.425 0.15x4 (10.8) (3.81x4) AQ027W±48V±1.8V High Efficiency DC-DC Converter Specifications Specifications Specifications (Typical value standard at nominal input line, full load, airflow 300 LFM, 25°C ambient temperature unless otherwise specified) Input Characteristics Notes & Conditions Min Typ Max Units Operating Input Voltage Range Note 1 36 48 75 V Input Under-Voltage Lockout Turn-On Voltage Threshold 34.3 34.8 35.4 V Turn-Off Voltage Threshold 33.8 34.3 34.8 V Lockout Hysteresis Voltage 0.4 0.5 0.6 V Maximum Input Current (I ) V =36V; Full Load 0.85 A INmax IN No-load Input Current 35 50 mA Off Converter Input Current 4 6 mA 2 Inrush Current Transient Rating 0.01 A s Input Reflected-Ripple Current RMS; see figures 1, 2 3 mA N NO OT TE E 1 1:: NOTE 1: Absolute max. input voltage 80V Output Characteristics Notes & Conditions Min Typ Max Units Output Voltage Set Point 50% Load 1.797 1.8 1.803 V Output Voltage Regulation Load V = 48V ± 2 ± 5 mV nom Line I = 10A ± 2 ± 5 mV Temperature ± 10 ± 20 mV Total Output Voltage Range 1.775 1.825 V Output Voltage Ripple and Noise 20 MHz bandwidth Peak to Peak Full load; 48 100 mV see figure 1, 4 RMS 13 20 mV Operating Output Current Range 0 - 15 A Output DC Current Limit Inception 16 17 19 A Output DC Current Limit Shutdown See figure 5 1.44 1.463 1.53 V Voltage Admissible Output Capacitance Full load, resistive 0 20.000 mF Dynamic Characteristics Notes & Conditions Min Typ Max Units 470mF load cap, Output Voltage Current Transient 1A/ms; see figure 9 Positive Step Change 50%I to 75% I 100 mV o o Negative Step Change 75% I to 50% I 100 mV o o Settling Time to 1% 200 ms Turn-On Transient See figures 6 and 7 Overshoot 0 % Turn-On Time Full load 15 25 ms Start-Up Inhibit Period 120 ms Efficiency Notes & Conditions Min Typ Max Units 100% Load 88.5 % 80% Load 88 % % 56% Load 87.3 Isolation Characteristics Notes & Conditions Min Typ Max Units Isolation Voltage input - output Basic Isolation 2000 VDC Isolation Capacitance Basic Isolation 2200 pF Isolation Resistance 10 MW 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ027W±48V±1.8V High Efficiency DC-DC Converter Feature Characteristics Notes & Conditions Min. Typ. Max Units Double Frequency for Switching frequency 190 200 210 kHz Input-Output Ripple ON/OFF Control Off-State Voltage 2.7 10 V On-State Voltage 0 0.8 V Output Voltage Trim Range -10 +10 % Output Voltage Remote Sense +10 % Range Output Over-Voltage Protection 115 118 123 % Overcurrent Protection Threshold 26-35 A Over-Temperature shutdown 125 °C General Characteristics Notes & Conditions Min Typ Max Units Operating Range Temperature Maximum Rating -40 +100 °C Storage Temperature Maximum Rating -50 +120 °C Relative Humidity Non condensing 5 95 % Bellcore Issue 4 Calculated MTBF Min. 1,500,000 hours RDF93 HRD Issue 5 Safety and Regulatory TUV and KEMA certified for compliance to EN06950 requirements CSA 22.2 No. 950-95(US and Canada) certified with basic insulation for compliance to UL 1950. Note : An external input fuse must always be used for compliance to listed safety requirements. CE compliant per 72/23/EEC (Low voltage directive) and 93/68/EEC to facilitate CE Mark at system level. Material flammability rating, UL94V-0 NEBS compliant Characteristic Curves Characteristic Curves Characteristic Curves Figure 3 Figure 2 Figure 4 DC/DC Vout Is Converter - Ic - Cerami c cap ESR FIGURE 1: Set-up diagram showing measurement Points for Input Terminal Ripple Current, Input Reflected Ripple Current and Output Voltage Ripple 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ027W±48V±1.8V High Efficiency DC-DC Converter FIGURE 2: Input Reflected Ripple Current, through a FIGURE 3: Input Terminal Ripple Current. 10mH source inductor at nominal input voltage Full rated output current and nominal input voltage with 10mH source impedance and and rated load current. (Is see figure 1) 47mF electrolytic capacitor. (Ic see figure 1) FIGURE 4: Output voltage ripple at nominal input FIGURE 5: Load current as a function of time when the voltage and rated load current. converter attempts to turn into a 10mW Load capacitance: 1mF ceramic capacitor short circuit and 10mF tantalum capacitor. 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ027W±48V±1.8V High Efficiency DC-DC Converter FIGURE 6 : Turn-on transient at full load. FIGURE 7 : Turn-on transient at zero load. FIGURE 8: Output voltage response to step-change in FIGURE 9: Output voltage response to step-change in load current (50%-75%-50% of I : outmax dI/dt = 0.1A/ms). Load cap: 10mF tantalum load current (50%-75%-50% of I : outmax dI/dt = 1A/ms). Load cap: 10mF tantalum capacitor and 1mF ceramic capacitor. capacitor and 1mF ceramic capacitor. 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ027W±48V±1.8V High Efficiency DC-DC Converter 100 95 90 85 Vin=36V 80 Vin=48V Vin=75V 75 70 65 60 3 5 8 10 15 Output Current [A] FIGURE 10: Efficiency vs. load current for different input voltages at 25°C 4.5 4 3.5 3 Vin=36 Vin=48 2.5 Vin=75 2 1.5 1 3 5 8 10 15 Output Current [A] FIGURE 11: Power dissipation vs. load current for different input voltages at 25°C 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com power dissipation [W] Efficiency [%] AQ027W±48V±1.8V High Efficiency DC-DC Converter To be provided in the next issue 15 10 100LFM 200LFM 300LFM 5 400LFM 0 0 25 40 55 70 85 Temperature (°C) FIGURE 13: Thermal plot of converter at 23 amp load FIGURE 12: Maximum output current de-rating curves vs. current with 25°C air flowing at the rate of 200 LFM. ambient air temperature for airflow rates of 100 LFM Air is flowing across the converter sideways from pin 1 to through 400 LFM with air flowing across the converter from pin 3 at nominal input voltage. pin 1 to pin 3 at nominal input voltage. 15 To be provided in the next issue 12 9 0LFM 100LFM 6 200LFM 300LFM 3 400LFM 0 0 25 40 55 70 85 Temperature (°C) FIGURE 14: Maximum output current de-rating curves vs. FIGURE 15: Thermal plot of converter at 25 amp load ambient air temperature for airflow rates of 100 LFM current with 25°C air flowing at the rate of 200 LFM. through 400 LFM with air flowing lengthwise from output to Air is flowing across the converter in the long direction input at nominal input voltage. from output to input at nominal input voltage. 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com Output Current (A) Output Current (A) AQ027W±48V±1.8V High Efficiency DC-DC Converter Features and Pins description Features and Pins description Features and Pins description REMOTE ON-OFF CONTROL The default logic is negative, where the Remote On/Off (pin 2) input is referenced to -Vin (pin 1). The Remote On/Off signal must be lower than 0.8V to enable the output voltage, and higher than 2.7V to disable the output voltage. Positive logic is an available option, add “–P” to the end of the ordering code. ON /OFF ON /OFF ON /OFF Vin (-) Vin (-) V Viin n ( (- -) ) Vin (-) Negative logic (permanently Enabled) Open Collector Enable Circuit Direct Logic Drive Remote Enable Circuit TRIMMING The output voltage can be trimmed by means of an external resistor connected between Trim (pin 6) and +Sense (pin 5) or -Sense (pin 7). The selection of the resistor follows the industry standard trim equation. An external resistor connected between Trim and –Sense pins will decrease the output voltage. For a decrease of D% of the nominal output voltage, calculate the value of the external resistor using the following equation: æ ö - 511 1.8 V æ ö target ç ÷ R = -10.22kW where D = ´100% ç ÷ trim-down ç ÷ D% è ø 1.8 è ø An external resistor connected between Trim and +Sense pins will increase the output voltage. For an increase of D% of the nominal output voltage, calculate the value of the external resistor using the following equation: 5.11*1.8 (100 + D%) æ ö 511 ç ÷ R = - -10.22 KW trim-up ç ÷ 1.225D% D% è ø 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com AQ027W±48V±1.8V High Efficiency DC-DC Converter TRIM UP 10000 1000 100 10 0 1 2 3 4 5 6 7 8 9 10 % Increase in output voltage SENSE (+ or -) The +Sense or –Sense pins must be connected to the load or output pins of the converter. To ensure tight regulation at the system critical load, then the remote sense pins should be connected to the system critical load. Reference applicable section of data sheet for maximum voltage compensation. Ensure sufficient margin to the over voltage threshold, review applicable sections of the data sheet and system loading: output over-voltage protection –Vs- system transient load condition(s). THERMAL CONSIDERATIONS The converter has internal thermal protection preventing hot spots on PCB from exceeding 120°C (248 °F), reference Figures 13 and 15. Margin to the temperature protection limit should be verified in the application. During an abnormal condition that induces an increase in the converter temperature, the converter output voltage will fold back when the over temperature protection threshold is reached. The converter will auto-recover when the fault condition is corrected and time allowed for the converter to cool down. OVER CURRENT PROTECTION The over current limit inception is typically 110% of the rated output current. When the over current limit inception is exceeded the output voltage will decrease proportional to the increase in the load current. Further increase in the load current will cause the output voltage to trip the under voltage protection threshold and enter fault protection, or hiccup reference Figure 5. The converter will enter fault protection typically at 125% of rated output current. When the fault is removed the converter will auto recover. Ordering code Ordering code Ordering code AQ027W48V018V15AN Option code Option code Option code -P for Positive Logic, example AQ027W48V018V15AN-P -PL for Cold Plate, example AQ027W48V018V15AN-PL 7105 Northland Terrace Minneapolis, MN 55428-1028 USA Tel:763.592.1900 FAX:763.592.1911 WEB:www.aultinc.com trim Resistance (kOhms)