] A AQ Q1 10 00 0W W4 48 8V V0 05 50 0V V2 20 0A AN N 48V 20A 5V High Efficiency, isolated 48V 20A 5V High Efficiency, isolated in out out in out out Q Qu ua ar rt te er r B Br riic ck k D DC C- -D DC C C Co on nv ve er rt te er r Features Features • Very high efficiency: 91% • 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 0.4" (58.4mm x 36.8mm x 10.2mm) • Adjustable output voltage (+/- 10%) • Input to Output Isolation at 2000Vdc,10MΩ Ω Ω Ω • Fixed Frequency (Input-Output ripple 400 KHz) • Undervoltage Lockout (UVLO) • Overcurrent protection • Overtemperature protection • Auto-restart after overcurrent shutdown • Remote sense • Remote ON/OFF • Operating temperature -40/+100°C • ISO 9001 Certified manufacturing processes • Fully Safety Certified P Pr ro od du uc ct t H Hiig gh hlliig gh ht ts s • The AQ DC-DC Converter family is Ault’s solution for next generation, cutting-edge board applications. • The synchronous rectification topology uses MOSFET instead of Schottky diodes providing extreme reduction in heat generation, boosting efficiency, eliminating the need for a heat sink and increasing reliability. • The low profile (0.4”), open frame construction allows smaller card pitch and improves ventilation. • The fixed switching frequency provides predictable EMI characteristics. AQ100W48V050V20AN.doc – page 1 AQ100W – 48V – 5V High Efficiency DC-DC Converter Mechanical Drawings Mechanical Drawings - All dimensions are in inches (mm) - Tolerances: x.xx in. +/-0.2 in. (0.5mm) 2.3 (58.42) 0.14 2.01 (3.68) (51) Ø=0.06 (2 pcs) (Ø=1.5) (2 pcs) Ø=0.04 (6 pcs) (Ø=1) (6 pcs) Bottom View PINOUT Description Pin Name Function 1 Vin (-) Return terminal for the -48V input bus 2 ON/OFF Logic signal referenced to Vin (-), TTL compatible (internal pull up ) to turn converter on and off 3 Vin (+) Positive terminal for the +48V input bus 4 Vout (+) Positive terminal for output voltage 5 Sense (+) Positive remote sense 6 TRIM Output voltage TRIM 7 Sense (-) Negative remote sense 8 Vout (-) Return terminal for output voltage AQ100W48V050V20AN.doc– page 2 1.45 (36.83) 0.42 0.15 (10.8) (4) 0.42 0.3 0.3 (10.8) (7.62) (7.62) 0.42 0.15x4 (10.8) (3.81x4). AQ100W – 48V – 5V High Efficiency DC-DC Converter 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 Surge Voltage T< 10μs 100 V Input Under-Voltage Lockout Turn-On Voltage Threshold 35.2 35.5 35.8 V Turn-Off Voltage Threshold 34.7 35 35.3 V Lockout Hysteresis Voltage 0.5 0.5 0.5 V Maximum Input Current (I) V =36V; Full Load 3.14 A INmax IN No-load Input Current 85 100 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: : Absolute max. input voltage 80V Output Characteristics Notes & Conditions Min Typ Max Units Output Voltage Set Point 50 % Load 4.98 5 5.02 V Output Voltage Regulation Over Load V = 48V ± 5 ± 8 mV nom Over Line I = 20A ± 2 ± 5 mV nom Over Temperature ± 20 ± 40 mV Total Output Voltage Range 4.95 5.05 V Output Voltage Ripple and Noise 20 MHz bandwidth Peak to Peak Full load, 80 120 mV RMS see figures 1, 4 45 80 mV Operating Output Current Range 0 - 20 A Output Voltage Output DC Current Limit Inception 21 22.5 26 A 10% low Output DC Current Limit Shutdown See fig.5 4.25 4.3 4.35 V Voltage Admissible Output capacitance Full load, resistive 0 20000 μF Dynamic Max Notes & Conditions Min Typ Units Characteristics 470μF load cap, Output Voltage Current Transient 1A/μs; see figure 9 Positive Step Change 50%I to 75% I 200 mV o o Negative Step Change 75% I to 50% I 200 mV o o Settling Time to 1% 1 ms Turn-On Transient See figures 6 and 7 Turn-On Time Full load; 10 15 ms Start-Up Inhibit Period tbd ms 10mF load Output Voltage Overshoot tbd % capacitance, Iout= 0A Efficiency Notes & Conditions Min Typ Max Units 100% Load V = 48V 90 % IN 80% Load V = 48V 91 % IN 56% Load V = 48V 91 % IN Isolation Characteristics Notes & Conditions Min Typ Max Units Isolation Voltage - Iinput to output Basic Isolation 2000 V DC Isolation Capacitance Basic Isolation 2200 pF Isolation Resistance 10 MΩ AQ100W48V050V20AN.doc– page 3 AQ100W – 48V – 5V High Efficiency DC-DC Converter Feature Characteristics Min. Typ. Max Units Double Frequency for Switching frequency 240 250 260 kHz Input-Output Ripple ON/OFF Control Off-State Voltage 2.7 15 V On-State Voltage 0 0.8 V Output Voltage Trim Range -20 +10 % Output Voltage Remote Sense +10 % Range Output Over-Voltage Protection 115 118 123 % Overcurrent Protection Threshold 21-27 A Average PCB Over-Temperature shutdown 125 °C temperature General Max Notes & Conditions Min Typ Units characteristics 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 3,138,534 hours RDF93 HRD Issue 5 EN60950; UL & CSA 60950 & IEC 60950. Approvals CE to LVD C Ch ha ar ra ac ct te er riis st tiic c C Cu ur rv ve es s 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. AQ100W48V050V20AN.doc– page 4 AQ100W – 48V – 5V High Efficiency DC-DC Converter FIGURE 2: Input Reflected Ripple Current, through a FIGURE 3: Input Terminal Ripple Current. Full rated output current and nominal input 10μH source inductor at nominal input voltage and rated load current. (Is in figure 1). voltage with 10μH source impedance and 47μF electrolytic capacitor (Ic in 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 attemps to turn into a 10mΩ Load capacitance: 1μF ceramic capacitor short circuitt. and 10μF tantalum capacitor. AQ100W48V050V20AN.doc– page 5 AQ100W – 48V – 5V High Efficiency DC-DC Converter FIGURE 6: Turn-on transient at full rated FIGURE 7: Turn-on transient at zero load current. load current. FIGURE 8: Output voltage response to step-change FIGURE 9: Output voltage response to step-change in load current. in load current. Load cap: 10μF, 100 mΩ ESR tantalum Load cap: 470μF, 30 mΩ ESR tantalum capacitor and 1μF ceramic capacitor capacitor and 1μF ceramic capacitor di / dt = 0.1A / μs. di / dt = 1A / μs. AQ100W48V050V20AN.doc– page 6 AQ100W – 48V – 5V High Efficiency DC-DC Converter 95 90 85 80 Vin=36V Vin=48V 75 Vin=75V 70 65 60 0 5 10 15 20 25 Output current [A] FIGURE 10: Efficency vs. load current for different input voltages at 25°C. 25 20 15 36 48 75 10 5 0 0 5 10 15 20 25 output current (A) FIGURE 11: Power dissipation vs. load current for different input voltages at 25°C. AQ100W48V050V20AN.doc– page 7 Power Dissipation (W) Efficiency [%] AQ100W – 48V – 5V High Efficiency DC-DC Converter To be provided in the next issue To be provided in the next issue FIGURE 12: Maximum output power derating curves vs. FIGURE 13: Thermal plot of converter at 17.5 amp load current ambient air temperature for airflow rates of 0 with 55°C air flowing at the rate of 200 LFM. LFM through 400 LFM with air flowing across Air is flowing across the converter sideways from pin the converter from pin 1 to pin 3 at nominal 1 to pin 3 at nominal input voltage. input voltage. To be provided in the next issue To be provided in the next issue FIGURE 14: Maximum output power derating curves vs. FIGURE 15:Thermal plot of converter at 25 amp load current ambient air temperature for airflow rates of 100 with 25°C air flowing at the rate of 300 LFM. LFM through 400 LFM with air flowing Air is flowing across the converter in the long lengthwise from input to output at nominal direction from input to output at nominal input input voltage. voltage. AQ100W48V050V20AN.doc– page 8 AQ100W – 48V – 5V High Efficiency DC-DC Converter Features and Pins description Features and Pins description SAFETY rd The converter is certified according to EN60950, UL and CSA 60950, 3 ed., and IEC 60950.. The converter has basic insulation rating. The converter meets NEBS compatibility. An external input fuse must always be used. ON-OFF CONTROL The default logic is negative: the on/off (pin #2) voltage is referenced to the -Vin (pin #4) and must be lower than 0.8V to turn the module on, and higher than 2.7V to shut the module off. Consult the factory for availability of positive logic modules. ON /OFF ON /OFF ON /OFF Vin (-) Vin (-) Vi Vin 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 the Trim and the +S or -S pins. The selection of the resistor follows the industry standard. A resistor connected between Trim and– S pins will decrease the output voltage. For a decrease of Δ% of the nominal output voltage, the value of the resistor should be: � − � 511 5 V � � target � � R = −10.22kΩ where Δ = ×100% � � trim-down � � Δ% � � 5 � � AQ100W48V050V20AN.doc– page 9 AQ100W – 48V – 5V High Efficiency DC-DC Converter A resistor connected between Trim and + S pins will increase the output voltage. For a desired increase of Δ% of the nominal output voltage, the value of the resistor should be: 5.11*5() 100 + Δ% � � 511 � � R = − −10.22 KΩ trim-up � � 1.225Δ% Δ% � � TRIM UP 10000 1000 100 10 0123456789 10 % Increase in Output Voltage SENSE (+ or -) The + or – S pins should be connected to the load to have a tight regulation. The maximum voltage drop that can be compensated for is 10% of Vout. Note that the overvoltage protection senses the output voltage directly at + Vout and – Vout pins. Care must be taken to avoid that the voltage at the output terminals + Vout and –Vout pins exceeds 5.5V. THERMAL CONSIDERATIONS The module is provided with a thermal protection, which prevents the hot spot on PCB to exceed 120°C (248 °F). Depending on the air flow rate and the ambient temperature, this limit is reached according to the Figure 12-13-14-15. OVERCURRENT PROTECTION The overcurrent limit inception is typically at 110% of the rated output current. When this limit is exceeded the output voltage decreases. A further current increase will trigger the hiccup protection. The behavior of the converter when the output is short circuited is shown in Figure 2. Ault Incorporated 7105 Northland Terrace Phone: 1-800-635-3311 763-592-1900 Fax: 7630592-1911 Website: http: // www.aultinc.com AQ100W48V050V20AN.doc– page 10 Trim Resistance (kOhms)