Technical Specification NQ90W90HGx26 9-90 V 0 - 90V 26A Non- Half-brick Continuous Input Output Current Isolated DC-DC Converter The NiQor® half-brick dc-dc converter is a non-isolated buckboost regulator, which employs synchronous rectification to achieve extremely high conversion efficiency. The High Input Voltage NiQor Brick family of converters can be used in traditional DPA (distributed power architecture) systems or provide a regulated output voltage from a battery source or other variable voltage source. The NiQor Brick family can be configured to Buck the input voltage down to a lower voltage or Boost the input voltage up to a higher voltage using a single external resistor. The module is RoHS 6/6 compliant (see last page). Non-Isolated NiQor Half-brick module Operational Features • • • • • • • Protection Features High efficiency, 97% at full rated load current Delivers up to 26A of output current Input Voltage Range: 9-90 Vdc Output Voltage Range: 0 - 90V (negative output is possible) Extensive on-board input and output filtering No minimum load requirement means no preload resistors required Adjustable current limit with current monitor • Input under-voltage lockout protects the converter at low input voltage conditions • Over-current shutdown protects converter from excessive load current or short circuits • Input/output over-voltage protection protects load and regulator from damaging voltages • Thermal shutdown protects converter from abnormal environmental conditions Mechanical Features Safety Features • Industry standard half-brick pin-out configuration • Standard size: 2.49" x 2.39" (63.1mm x 60.6mm) • Total height only 0.512" (13 mm) • Total weight: Encased - 5.6oz (158.2g) • UL 60950-1/R:2011-12 • EN 60950-1/A2:2013 • CAN/CSA-C22.2 No. 60950-1/A1:2011 Contents Control Features • • • • • On/Off control Output voltage trim permits custom voltages Remote Sense Settable current limit Output voltage trim range of 0V - 90V Product # NQ90W90HGx26 Phone 1-888-567-9596 Page No. Standard Mechanical Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Flanged Mechanical Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Technical Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Standards & Qualifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 www.synqor.com Doc.# 005-0006401 Rev. C 06/17/15 Page 1 of 13 Standard Mechanical Diagram 2.486 [63,14] SEATING PLANE HEIGHT 0.512 0.005 [ 13,00 0,12] 2.000 [50,80] 9-90 V 0 - 90V 26A Half-brick Input: Outputs: Current: Package PIN EXTENSION 0.163 [4,14] 0.700 [17,78] 4 5 6 7 8 0.004 [0,10] 1.900 [48,26] 0.01 [0,3] 1.900 [48,26] 2.386 [60,60] 3 1 C B A 2 0.400 0.600 0.800 1.000 1.400 BOTTOMSIDE CLEARANCE 0.017 0.010 [ 0,43 0,25] 0.30 [7,6] 1 THRU HOLE STANDOFFS SEE NOTE 1 (4 PLCS) [10,16] [15,24] [20,32] [25,40] [35,56] PIN DESIGNATIONS 1)THREADED: APPLIED TORQUE PER M3 SCREW 5in-lb RECOMMENDED (6in-lb LIMIT). NONTHREADED: DIA 0.125" (3.18mm) 2)BASEPLATE FLATNESS TOLERANCE IS 0.004" (.10mm) TIR FOR SURFACE. 3)PINS 1-3, 5-7, A, B, and C ARE 0.040" (1.02mm) DIA. WITH 0.080" (2.03mm) DIA. STANDOFFS. 4)PINS 4 AND 8 ARE 0.080" (2.03mm) DIA. WITH 0.125" (3.18mm) DIA STANDOFFS 5)ALL PINS: MATERIAL: COPPER ALLOY FINISH: MATTE TIN OVER NICKEL PLATE 6)WEIGHT: 5.6oz (158.2g) 7)ALL DIMENSIONS IN INCHES(mm) TOLERANCES: X.XXIN +/-0.02 (X.Xmm +/-0.5mm) Product # NQ90W90HGx26 Phone 1-888-567-9596 Pin Label Function, See Note 1 1 +Vin 2 On/Off Input to enable/disable the converter, TTL Input to synchronize the converter to an external clock, TTL A SyncIn B Iset C 3 4 5 6 7 Ishare -Vin -Vout VsenseVset Vsense+ 8 +Vout Positive Supply Input Input to set maximum output current Input/Output: Current monitor or Current share Negative Supply Input, internally connected to Pin 4 Negative Power Output, internally connected to Pin 3 Negative Power Voltage Sense. See Note 2 Input to set the maximum output voltage. Positive Output Voltage Sense. See Note 3 Positive Power Output Notes: 1)All Control signals are referenced to Vsense- pin. 2)Vsense- should be permanently connected to -Vout either at the converter or remotely. 3)Vsense+ should be permanently connected to +Vout either at the converter or remotely. www.synqor.com Doc.# 005-0006401 Rev. C 06/17/15 Page 2 of 13 Input: Outputs: Current: Package Flanged Mechanical Diagram 9-90 V 0 - 90V 26A Half-brick 3.150 [80,01] 2.950 [74,93] 2.486 [63,14] SEATING PLANE HEIGHT 0.495±0.025 [ 12,57±0,63 ] PIN EXTENSION 0.180 [4,57] 0.700 [17,78] 4 5 7 6 8 TOP VIEW 0.010 [0,25] 1.300 1.866 2.386 [33,02] [47,40] [60,60] 1.900 [48,26] 0.31 [7,9] 3 1 0.775±0.020 [ 19,69±0,50 ] .130 [3,30] SEE NOTE 1 (6 PLCS) FLANGE THICKNESS 0.125 [3,18] C B A 2 1 0.400 [10,16] BOTTOMSIDE CLEARANCE 0.005±0.010 [ 0,13±0,25 ] 0.600 [15,24] 0.800 [20,32] 1.000 [25,40] 1.400 [35,56] NOTES 1) APPLIED TORQUE PER M3 OR 4-40 SCREW 4in-lb RECOMMENDED (5in-lb LIMIT) 2) BASEPLATE FLATNESS TOLERANCE IS 0.010" (.25mm) TIR FOR SURFACE. 3) PINS 1-3, 5-7, A, B, AND C ARE 0.040" (1.02mm) DIA. WITH 0.080" (2.03mm) DIA. STANDOFFS. 4) PINS 4 AND 8 ARE 0.080" (2.03mm) DIA. WITH 0.125" (3.18mm) DIA STANDOFFS 5) ALL PINS: MATERIAL: COPPER ALLOY FINISH: MATTE TIN OVER NICKEL PLATE 6) WEIGHT: 5.8oz (164.2g) 7) ALL DIMENSIONS IN INCHES (mm) TOLERANCES: X.XXIN +/-0.02 (X.Xmm +/-0.5mm) X.XXXIN +/-0.010 (X.XXmm +/-0.25mm) Product # NQ90W90HGx26 Phone 1-888-567-9596 PIN DESIGNATIONS Pin Label Function, see Note 1. 1 +Vin 2 ON/OFF Input to enable/disable the converter, TTL. A SyncIn Input to synchronize the converter to an external clock, TTL. Positive Supply Input. Iset Input to set the maximum output current. B Ishare Input/Output: Current monitor or Current share. C -Vin Negative Supply Input, internally connected to Pin 4. 3 -Vout Negative Power Output, internally connected to Pin 3. 4 VsenseNegative Power Voltage Sense, See Note 2. 5 Vset Input to set the maximum output voltage. 6 Vsense+ Positive Output Voltage Sense, See Note 3. 7 +Vout Positive Power Output. 8 Notes: 1)All control signals referenced to Vsense- pin. or at the converter 2)Vsense+ should be permantly connected to +Vout either either at the convertor or remotely. 3)Vsense- should be permantly connected to -Vout either either at the convertor or remotely. www.synqor.com Doc.# 005-0006401 Rev. C 06/17/15 Page 3 of 13 Input: Outputs: Current: Package Technical Specification 9-90 V 0 - 90V 26A Half-brick NQ90W90HGx26 Electrical Characteristics Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V 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 ABSOLUTE MAXIMUM RATINGS Input Voltage Non-Operating Operating Isolation Voltage Input to Baseplate Output to Baseplate Vout Min. All All -1 All All Storage Temperature Voltage at ON/OFF input pin Voltage at Vset and Iset Pins Voltage at SyncIn Pin Typ. -45 0 -0.2 -0.2 Voltage between Vsense+ and +Vout pins Voltage between Vsense- and -Vout pins Max. Units Notes & Conditions 100 90 V V 1150 1150 125 5.5 3.5 3.5 ±6.0 ±0.25 Vdc Vdc °C V V V V V 90 40 26 V A A µF V A Continuous Continuous Note 1 Note 1 RECOMMENDED OPERATING CONDITIONS Input Voltage Range Input Fuse Rating All All 9 All All All 100 0 0 All All All All 12 48 All All 9.2 5.1 All All 0 0 Input Current External Input Capacitance Output Voltage Output Current INPUT CHARACTERISTICS Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Hysteresis Input Current Limit No-Load Input Current “ Disabled Input Current Input Filter Components Value (C\L\C) OUTPUT CHARACTERISTICS Output Voltage Range Operating Output Current Range Output Voltage Regulation Load Regulation Total Output Voltage Range For a Step Change in Output Current Settling Time For a Step Change in Output Current Settling Time Turn on Transient Startup delay Turn on Transient Rise Rate Turn on Transient Output Voltage Overshoot 9.5 5.5 4.0 10 5.9 Input voltage dependent V V V A mA mA mA µF\µH\µF 29.3 125 125 20 10\0.33\36 90 26 V A Set by Vset resistor 12 48 All All All All -2%*Vout*Iout/Imax ±100mV ±2%*Vout + Load Reg 50 200 29.3 100 40\0.33\10 1 mV mV A µF µF\µH\µF µA 48 Vin Full Load; 100uF; 20 MHz b.w. 12 12 72 72 All All All 800 400 2400 1800 2 3.1 0 mV µs mV µs ms V/ms V (0.1 A/µs); 50%-75%-50% Iout max To within 1.5% Vout nom. (0.1 A/µs); 50%-75%-50% Iout max To within 1.5% Vout nom. Resistive load " All Output Voltage Ripple and Noise (pk-pk/48Vin) “ Output DC Over Current limit External Output Capacitance Output Filter Components Reverse Current DYNAMIC CHARACTERISTICS Output Voltage during Current Transient Product # NQ90W90HGx26 All 90 26 Turn on at 10V Fast blow external fuse recommended Input current max equals output rated current ESR > 50mΩ See Note 2 Phone 1-888-567-9596 www.synqor.com Between Sense pins, over sample, line, load, temp. & life. Effective on input, output condition ESR > 1 mΩ Disabled " Doc.# 005-0006401 Rev. C 06/17/15 Page 4 of 13 Input: Outputs: Current: Package Technical Specification 9-90 V 0 - 90V 26A Half-brick NQ90W90HGx26 Electrical Characteristics (continued) Ta = 25 °C, airflow rate = 300 LFM, Vin = 48 V 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 Vout Min. EFFICIENCY 100% Load; 48 Vin 28 100% Load; 72 Vin 48 100% Load; 28 Vin 72 50% Load; 48 Vin 28 50% Load; 72 Vin 48 50% Load; 28 Vin 72 FEATURE CHARACTERISTICS Switching Frequency All Synchronization Sync Frequency Range All Duty Cycle Range at Input Pin All Logic Low Threshold Range All Logic High Threshold Voltage All Threshold Hysterysis All Pin Pull-Up Voltage All Pin Pull-Up Resistance All On/Off, Negative (N) Logic Off-State Threshold Voltage All On-State Threshold Voltage All Threshold Hysterysis All Pin Pull-Up Voltage All Pin Pull-Up Resistance All Output Voltage Setpoint Pin Pull-Up Voltage All Pin Pull-Up Resistance All Output Voltage Setpoint Range All Output Over-Voltage Shutdown All Output Current Setpoint Pin Pull-Up Voltage All Pin Pull-Up Resistance All Output Current Setpoint Range All Input/Output Current Limit All Ishare/Imon Pin Voltage at No Load All Pin Voltage at Full Load (Imax) All Pin Output Resistance All Over-Temperature Shutdown All Over-Temperature Shutdown Restart Hysteresis All RELIABILITY CHARACTERISTICS Calculated MTBF (TR-NWT-000332; Telcordia) All Calculated MTBF (MIL-HDBK-217F; MIL-217) All Field Demonstrated MTBF All TEMP LIMITS FOR POWER DERATING Semiconductor Junction Temperature All Board Temperature All Baseplate Temperature All Note 1: All control signals are referenced to Vsense- pin. Note 2: Input capacitance and ESR of input capacitance dictated Product # NQ90W90HGx26 Phone 1-888-567-9596 Typ. Max. Units 96 97 94 96 97 94 240 200 25 0.8 250 1.2 1.3 0.1 3.3 5 Notes & Conditions % % % % % % 260 KHz 300 75 KHz % V V V V kΩ 2.0 See REMOTE ON/OFF: in CONTROL FEATURES 1.0 1.4 1.1 0.3 3.3 10 1.5 V V V V kΩ See OUTPUT VOLTAGE SETPOINT: in CONTROL FEATURES 2.5 10.9 0 V kΩ V V 90 99 Fixed - Does not vary with output setpoint. See OUTPUT CURRENT SETPOINT: in CONTROL FEATURES 2.5 10 0 27.0 29.3 V kΩ A A 26 31.6 See OUTPUT CURRENT SHARE: in CONTROL FEATURES 0.2 2.2 2.5 115 15 V V kΩ °C °C 3.58 2.48 Average PCB Temperature 106 Hrs. 70 °C Tbaseplate 106 Hrs. 70 °C Tbaseplate 106 Hrs. See our website for details 125 125 100 °C °C °C Package rated to 150 °C UL rated max operating temp 130 °C by input stability requirements. www.synqor.com Doc.# 005-0006401 Rev. C 06/17/15 Page 5 of 13 9-90 V 0 - 90V 26A Half-brick Input: Outputs: Current: Package Technical Specification 45 100 40 35 30 Pdiss. (W) Efficiency (%) 95 90 72Vin 48Vout 72Vin 28Vout 4 6 8 10 12 14 16 18 20 22 24 72Vin 28Vout 5 28Vin 72Vout 2 48Vin 28Vout 48Vin 72Vout 28Vin 48Vout 0 72Vin 48Vout 10 48Vin 72Vout 80 20 15 48Vin 28Vout 85 25 0 26 28Vin 48Vout 28Vin 72Vout 0 2 4 6 8 10 Load Current (A) 12 14 16 18 20 22 24 26 Load Current (A) Figure 1: Efficiency at different output voltages vs. load current for different input voltages at 25°C. Figure 2: Power dissipation at different output voltages vs. load current for different input voltages at 25°C. 30 1 µH 25 Derated Output Current (A) source impedance See Fig. 5 See Fig. 6 20 15 i Tb=80 C; Vout=12 V S i C Converter Tb=80 C; Vout=28 V Tb=100 C; Vout=28 V V Tb=80 C; Vout=48 V SOURCE Tb=100 C; Vout=48 V 5 Dc-dc IN Tb=100 C; Vout=12 V 10 V 0 9 18 27 36 45 54 Input Voltage (V) 63 72 81 * See values for recommended external input capacitance. Inductor optional as needed. 90 OUT 100 µF 100mΩ ESR C* Tb=80 C; Vout=90 V Tb=100 C; Vout=90 V V tantalum capacitor Figure 3: Maximum output power derating curve with a controlled baseplate temperature of 80°C and 100°C vs. Input voltage. Figure 4: Test set-up diagram showing measurement points for Input Terminal Ripple Current (Figure 5) and Output Voltage Ripple (Figure 6). Figure 5: Input Terminal Ripple Current at 48V input and rated load current (50mA/div). Load capacitance: 100uF electrolytic cap. Bandwidth: 20MHz. See Figure 4 Figure 6: Output Voltage Ripple at 48V input and rated load current (500mV/ div). Load capacitance: 100uF electrolytic cap. Bandwidth: 20MHz. See Figure 4. Product # NQ90W90HGx26 Phone 1-888-567-9596 www.synqor.com Doc.# 005-0006401 Rev. C 06/17/15 Page 6 of 13 Input: Outputs: Current: Package Technical Specification Figure 7: Turn-on transient at 48V input; full load (5ms/div). Top Traces: Vout (20V/div). Bottom Trace: ON/OFF input (5V/div) 9-90 V 0 - 90V 26A Half-brick Figure 8: Turn-on transient at 48V input; zero load (5ms/div). Top Traces: Vout (20V/div). Bottom Trace: ON/OFF input (5V/div) 2.50 Vset voltage (V) 2.00 1.50 1.00 0.50 0.00 0 10 20 30 40 50 60 70 80 90 Output Voltage Setpoint (V) Figure 9: Vset pin voltage vs. Output Voltage Setpoint. Figure 10: Output Voltage vs. Vset pin voltage dynamics; 28Vin, 10A out (2mS/ div). Top trace: Vset pin voltage (300mV/div). Bottom trace: Output Voltage (2V/ div). 2.5 Iset Pin Voltage (V) 2.0 1.5 1.0 0.5 0.0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 Output Current Setpoint (A) Figure 11: Iset pin voltage vs. Output Current Limit Setpoint. Product # NQ90W90HGx26 Phone 1-888-567-9596 Figure 12: Output Current vs Iset pin voltage dynamics; 28Vin 10Vout (5mS/div). Top Trace: Output Current (2A/div). Bottom Trace: Iset pin voltage (200mV/div). www.synqor.com Doc.# 005-0006401 Rev. C 06/17/15 Page 7 of 13 Input: Outputs: Current: Package Technical Specification 9-90 V 0 - 90V 26A Half-brick 3.0 2.5 Ishare (V) 2.0 1.5 1.0 0.5 0.0 0 5 10 15 20 25 30 Output Current (A) Figure 13: Ishare/Imon pin Voltage vs. Output Load Current. Product # NQ90W90HGx26 Phone 1-888-567-9596 Figure 14: Output voltage response for 48V input; 12V, 48V, 72V, 90V output to step change in load current (50%-75%-50% pf Iout max; di/dt=0.1A/uS). Load cap: 100uF electrolytic cap, Vout (2V/div); (2mS/div) www.synqor.com Doc.# 005-0006401 Rev. C 06/17/15 Page 8 of 13 Input: Outputs: Current: Package Technical Specification 9-90 V 0 - 90V 26A Half-brick Standards & Qualifications Parameter Notes & Conditions STANDARDS COMPLIANCE UL 60950-1/R:2011-12 EN 60950-1/A2:2013 CAN/CSA-C22.2 No. 60950-1/A1:2011 Note: An external input fuse must always be used to meet these safety requirements. Contact SynQor for official safety certificates on new releases or download from the SynQor website. Parameter QUALIFICATION TESTING Life Test Vibration Mechanical Shock Temperature Cycling Power/Thermal Cycling Design Marginality Humidity Solderability Altitude # Units Test Conditions 32 5 5 10 5 5 5 15 pins 2 95% rated Vin and load, units at derating point, 1000 hours 10-55 Hz sweep, 0.060" total excursion, 1 min./sweep, 120 sweeps for 3 axis 100g minimum, 2 drops in x, y and z axis -40 °C to 100 °C, unit temp. ramp 15 °C/min., 500 cycles Toperating = min to max, Vin = min to max, full load, 100 cycles Tmin-10 °C to Tmax+10 °C, 5 °C steps, Vin = min to max, 0-105% load 85 °C, 85% RH, 1000 hours, continuous Vin applied except 5 min/day MIL-STD-883, method 2003 70,000 feet (21 km), see Note Note: A conductive cooling design is generally needed for high altitude applications because of naturally poor convective cooling at rare atmospheres. Product # NQ90W90HGx26 Phone 1-888-567-9596 www.synqor.com Doc.# 005-0006401 Rev. C 06/17/15 Page 9 of 13 Input: Outputs: Current: Package Application Section BASIC OPERATION AND FEATURES 9-90 V 0 - 90V 26A Half-brick CONTROL FEATURES REMOTE ON/OFF: Only Negative On/Off logic is available in the converter series: logic high at the input turns the converter Off while a logic low turns in On. Timing of this is shown in Figures 7, 8. A high level can be driven to any voltage between 1.5V and 3.3V, or simply left floating as the unit contains an internal 10KΩ pull-up to 3.3V. The pin can be pulled low (to Vsense-) by an optocoupler, an opensource/drain transistor or wired permanently to Vsense-. The converter runs at a fixed frequency with a predictable To provide noise immunity the input has 0.3V of hysteresis. EMI performance. This half-brick converter uses the industry standard footprint Multiple units that have a common Vsense- connection and pin-out configuration. A typical V-I characteristic, with can be controlled by the same On/Off signal, but it is Vsetpoint=50V and Isetpoint=18A, when operating from recommended that a small schottky diode be added to each input as shown in Figure B. Vin=30V, is shown in Figure A. This converter consists of integrated buck and boost converters, both controlled simultaneously by a digital controller. It automatically changes operating mode (buck mode or boost) when the line voltage or output set point changes. Very high efficiency is maintained over wide input and output ranges by shifting operational modes and use of synchronous rectifiers. Vin1+ +Vin On/Off 100 Vo=Vmax +Vout Vout1+ Vsense+ HVNQ DC-DC Converter Vin=90V Vsense- 80 Vin=75V -Vin -Vout +Vin +Vout Output Voltage (V) Vout60 Vin=60V Increase Vsetpoint Increasing Vin Vin2+ On/Off Vin=45V 40 On/Off Vin=30V Vout2+ Vsense+ HVNQ DC-DC Converter Vsense- 20 Vin=15V -Vin Increase Isetpoint -Vout 0 0 5 10 15 Output Current (A) 20 25 30 Figure B: CLOCK SYNCHRONIZATION: The module will synchronize its switching to a clock signal at the SyncIn pin (relative to Vsense-) of between 200 and 300KHz. For noise immunity, the input has 0.1V hysteresis. It can be driven by any standard logic gate. The input has an internal 5KΩ pull-up to 3.3V; if unused, leave this input floating or tie it directly to Vsense-. Figure A OUTPUT VOLTAGE SETPOINT: The output voltage can be programmed to any voltage between 0 V dc and Vmax by connecting one resistor between the Vset pin (6) and Vsense- (5); See Figure C. For a desired output voltage, the value of the resistor should be: Rvset(Vset) = Product # NQ90W90HGx26 Phone 1-888-567-9596 www.synqor.com [( 11830 x Vmax Vset + 0.058 x Vmax Doc.# 005-0006401 Rev. C ) -10912 06/17/15 ] (Ω) Page 10 of 13 Input: Outputs: Current: Package Application Section Vin+ +Vin Cin On/Off Iset +Vout Vout+ Vsense+ HVNQ DC-DC Converter Cout Vset Rvset Vsense- Riset -Vout -Vin Vin- Vout- Figure C: 9-90 V 0 - 90V 26A Half-brick 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”. The lockout circuitry is a comparator with DC hysteresis. When the input voltage is rising, it must exceed the typical TurnOn Voltage Threshold value (listed on the specification 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. Alternatively, the Vset pin can be driven from an external voltage source: Undriven, this pin floats at 2.5V which sets Output Current Shutdown: To provide protection in an the output to 0V. See Figure 10 for the large scale dynamics output short condition, the unit is equipped with internal short circuit protection. When the short-circuit protection is of this input. triggered, the converter shuts down and then waits an inhibit Vset time (~100ms), after which it tries to turn on again. If the Vvset(Vset) = 2.366 – 2.316 V Vmax short condition remains, the current limit circuit will limit the See Figure 9 output current. The unit will return to normal operation once where: the fault condition is removed. Vset = desired output voltage setpoint Internal Over-Voltage Protection: To fully protect from Vmax = maximum rated output voltage (90V) excessive output voltage, the unit contains an output overOUTPUT CURRENT SETPOINT: The maximum output voltage shutdown that is fixed at ~110% of Vmax. If this current (effectively the current limit) can be reduced to limit is reached, the converter shuts down and then waits an any value between 0 and Imax by connecting one resistor inhibit time (~100ms), after which it restsarts. ( ) between the Iset pin (B) and Vsense- (5); see Figure C. The Over-Temperature Shutdown: Two sensors in the value of the resistor should be: module monitor the temperature of both the buck and boost sections. When the temperature at either sensor exceeds the 0.0469 Imax + Iset RIset(Iset) = *10200 -10 (Ω) Over Temperature Shutdown value, the converter is disabled. 1.153 Imax - Iset It will restart normally when it then cools by the amount of Alternatively, the Iset pin can be driven from an external voltage source: the Over-Temperature Shutdown Hysteresis. [( Viset(Iset)= ( ) 0.0953+2.085 ] * Iset/Imax ) V where: Iset = desired output current setpoint Imax = maximum rated output current (26A) Undriven, the Iset pin floats to 2.5V which sets the current limit at its nominal value of 115%*Imax. See Figure 12 for the large signal dynamics of this control. Product # NQ90W90HGx26 Phone 1-888-567-9596 www.synqor.com Doc.# 005-0006401 Rev. C 06/17/15 Page 11 of 13 Input: Outputs: Current: Package Application Section APPLICATION CONSIDERATIONS 9-90 V 0 - 90V 26A Half-brick Cin2 Input filtering: These modules should be connected to a low-impedance source. A highly inductive source can affect the stability of the module. An input capacitor must be placed adjacent to the input pins of the module to minimize input ripple voltage and ensure stability. See SynQor's application note titled Input System Stability for guidance on selecting appropriate input filter elements. Vin+ +Vin Cin1 On/Off Riset Iset +Vout Vin-,Vout+ Vsense+ HVNQ DC-DC Converter Cout Vset Rvset Vsense-Vout -Vin Vout- http://www.synqor.com/documents/appnotes/appnt_System_Instability.pdf Figure D: Negative output setup Output capacitance: An output capacitor of at least 100uF with an ESR of ~50mOhms is recommended to damp Note that all control signals are referenced to Vsense-, which the resonance of the output filter. More capacitance can be in this arrangement is at Vout- potential. added to improve dynamic response to load variation; there is not upper limit on the value of the output capacitance. Very large output capacitors may slow the converter's start up time due to the current required to charge them being Vin+ +Vin +Vout limited by current limit or Isetpoint. Vout+ Remote sense: In the event of an open sense line, the module maintains output voltage regulation via internal resistors between its Vsense+ and +Vout, and Vsense- and -Vout pins. To avoid damaging those resistors, maintain the voltage differentials to within the limits in ABSOLUTE MAXIMUM RATINGS at all times. On/Off Ishare Cin +Vin On/Off for Vin < Vout -Vin where Imax = Maximum rated output current Vout ) Cout Vout- Ishare Vin Rvset -Vout -Vin for Vin >Vout Ilimit = 1.12 x Imax (Amps) ( Vset Vsense- Current limit: Available current is limited by maximum output current in buck mode (Vin>Vout), and by maximum input current in boost mode (Vin<Vout). Ilimit = 1.12 x Imax HVNQ DC-DC Converter +Vout Vsense+ HVNQ DC-DC Converter Vset Rvset Vsense-Vout (Amps) Figure E: Setup for output current sharing Generating Negative output voltage (inversion): The circuit shown in Figure D can be used to generate a negative Current Sharing: In applications requiring more power output voltage from a positive input. than can be supplied from a single converter, multiple units can be arranged to share the load as shown in Figure E. The units should all be set at the same output voltage setpoint by using identical Rvset resistors. In this arrangement, the level of the Ishare/Imon bus is that of the average current delivered by each converter. Product # NQ90W90HGx26 Phone 1-888-567-9596 www.synqor.com Doc.# 005-0006401 Rev. C 06/17/15 Page 12 of 13 Input: Outputs: Current: Package Ordering Information 9-90 V 0 - 90V 26A Half-brick PART NUMBERING SYSTEM ORDERING INFORMATION The part numbering system for SynQor’s dc-dc converters follows the format shown in the example below. The tables below show the valid model numbers and ordering options for converters in this product family. When ordering SynQor converters, please ensure that you use the complete 15 character part number consisting of the 12 character base part number and the additional 3 characters for options. Add “-G” to the model number for 6/6 RoHS compliance. NQ 9 0 W 9 0 H G C 2 6 N N F - G 6/6 RoHS Options (see Ordering Information) Input Voltage 9-90 V Model Number Output Current NQ90W90HGx26Nyz-G Output Voltage 0 - 90V Max Output Current 26A Thermal Design The following options must be included in place of the w x y z spaces in the model numbers listed above. Performance Level Package Size Output Voltage Options Description: w x y z Enable Thermal Design Pin Style Feature Set Logic Mode: Mode (see Ordering Information) Input Voltage Product Family The first 12 characters comprise the base part number and the last 3 characters indicate available options. The “-G” suffix indicates 6/6 RoHS compliance. W - Buck / Boost C - Encased with Threaded Baseplate D - Encased with Non-Threaded Baseplate V - Encased with Flanged Baseplate NNegative N - 0.145" R - 0.180" Y - 0.250" F - Current Sharing / Trimmable current limit Application Notes A variety of application notes and technical white papers can be downloaded in pdf format from our website. RoHS Compliance: The EU led RoHS (Restriction of Hazardous Substances) Directive bans the use of Lead, Cadmium, Hexavalent Chromium, Mercury, Polybrominated Biphenyls (PBB), and Polybrominated Diphenyl Ether (PBDE) in Electrical and Electronic Equipment. This SynQor product is 6/6 RoHS compliant. For more information please refer to SynQor’s RoHS addendum available at our RoHS Compliance / Lead Free Initiative web page or e-mail us at [email protected]. Contact SynQor for further information and to order: Phone: Toll Free: Fax: E-mail: Web: Address: Product # NQ90W90HGx26 978-849-0600 888-567-9596 978-849-0602 [email protected] www.synqor.com 155 Swanson Road Boxborough, MA 01719 USA Phone 1-888-567-9596 Not all combinations make valid part numbers, please contact SynQor for availability. See the Product Summary web page for more options. PATENTS SynQor holds numerous U.S. patents, one or more of which apply to most of its power converter products. Any that apply to the product(s) listed in this document are identified by markings on the product(s) or on internal components of the product(s) in accordance with U.S. patent laws. SynQor’s patents include the following: 5,999,417 6,222,742 6,545,890 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 7,558,083 7,564,702 7,765,687 7,787,261 8,023,290 8,149,597 8,493,751 8,644,027 WARRANTY SynQor offers a two (2) year limited warranty. Complete warranty information is listed on our website or is available upon request from SynQor. www.synqor.com Doc.# 005-0006401 Rev. C 06/17/15 Page 13 of 13