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SSQE48T10033-PABNG

SSQE48T10033-PABNG

  • 厂商:

    POWER-ONE

  • 封装:

    DIP8 模块,1/16砖

  • 描述:

    隔离模块 直流转换器 1 输出 3.3V 10A 36V - 75V 输入

  • 数据手册
  • 价格&库存
SSQE48T10033-PABNG 数据手册
The new SSQE48T10033 DC-DC converter is an open frame sixteenthbrick DC-DC converter that conforms to the Distributed Open Standards Architecture (DOSA) specifications. The converter operates over an input voltage range of 36 to 75 VDC, and provides a tightly regulated output voltage with an output current up to 10 A. The output is fully isolated from the input and the converter meets Basic Insulation requirements permitting a positive or negative output configuration. The converter is constructed using a single-board approach with both planar and discrete magnetics. The standard feature set includes remote On/Off (positive or negative logic), input undervoltage lockout, output overvoltage, overcurrent, and short circuit protections, output voltage trim, and overtemperature shutdown with hysteresis. With standard pinout and trim equations and excellent thermal performance, the SSQE48T10033 converters can replace in most cases existing eighth-brick converters. Inclusion of this converter in a new design can result in significant board space and cost savings. • 36-75 VDC Input; 3.3 VDC @ 10 A Output • Industry-standard DOSA pinout • On-board input differential LC-filter • Start-up into pre-biased load • No minimum load required • Withstands 100 V input transient for 100 ms • Fixed-frequency operation • Hiccup overcurrent protection • Fully protected (OTP, OCP, OVP, UVLO) • Remote sense • Remote ON/OFF positive or negative logic option • Output voltage trim range: +10% / −20% with industry-standard trim equations • Designed to meet Class B conducted emissions per FCC and EN 55032 when used with external filter • All materials meet UL94, V-0 flammability rating • Approved to the latest edition and amendment of ITE Safety standards, UL/CSA 62368-1 and EN/IEC 62368-1 • RoHS lead free solder and lead-solder-exempted products are available SSQE48T10033 2 Conditions: TA = 25ºC, Airflow = 300 LFM (1.5 m/s), Vin = 48 VDC, Cin = 33 µF, unless otherwise specified. Absolute Maximum Ratings Input Voltage Continuous 0 80 VDC Operating Ambient Temperature -40 85 °C Storage Temperature -55 125 °C Isolation Characteristics I/O Isolation 2250 Isolation Capacitance VDC 150 Isolation Resistance pF 10 MΩ Feature Characteristics Switching Frequency 440 Output Voltage Trim Range1 Remote Sense Compensation Industry-standard equations (3.3 V) 1 -20 Percent of VOUT(NOM) Output Over-voltage Protection Non-latching Over-temperature Shutdown (PCB) Non-latching Peak Back-drive Output Current (Sinking current from external source) during startup into pre-biased output Back-drive Output Current (Sinking Current from external source) 120 127 kHz +10 % +10 % 140 % 125 °C Peak amplitude 1 ADC Peak duration 50 µs Converter Off; external voltage = 5 VDC 10 mADC Auto-Restart Period Applies to all protection features 200 ms Turn-On Time See Figures E, F, and G 3 ms ON/OFF Control (Positive Logic) ON/OFF Control (Negative Logic) Converter Off (logic low) -20 0.8 VDC Converter On (logic high) 2.4 20 VDC Converter Off (logic high) 2.4 20 VDC Converter On (logic low) -20 0.8 VDC Mechanical Dimensions Weight 0.9 x 1.3 x 0.374 in 12.3 g Reliability Telcordia SR-332, Method I Case 1 50% electrical stress, 40°C ambient MTBF 16.23 MHrs 1 Vout can be increased up to 10% via the sense leads or 10% via the trim function. However, the total output voltage trim from all sources shall not exceed 10% of VOUT(nom) in order to ensure specified operation of overvoltage protection circuitry. tech.support@psbel.com SSQE48T10033 3 Input Characteristics Operating Input Voltage Range Input Under-voltage Lockout 36 48 75 VDC Turn-on Threshold 32 33.7 35 VDC Turn-off Threshold 29 31.2 33 VDC Input Voltage Transient 100 ms 100 VDC Maximum Input Current VIN = 36 VDC , IOUT = 10 ADC 1.1 ADC Input Stand-by Current Vin = 48 V, converter disabled 11 mA Input No Load Current (0 load on the output) Vin = 48 V, converter enabled 40 mA Input Reflected-Ripple Current, is Vin = 48 V, 25 MHz bandwidth 10 mAPK-PK Input Voltage Ripple Rejection 120 Hz 90 dB Output Characteristics External Load Capacitance Plus full resistive load Output Current Range 3.3 VDC 0 Current Limit Inception Non-latching, for 3.3 VDC 11 Peak Short-Circuit Current Non-latching, Short = 10 mΩ RMS Short-Circuit Current Non-latching µF 10 ADC 14 ADC 14 A 3.5 Output Voltage Setpoint Accuracy (no load) Output Regulation 12.5 20,000 -1.5 Arms +1.5 %VOUT Over Line ±2 ±5 mV Over Load ±2 ±5 mV +3.0 %Vout 100 mVPK-PK 2 Overall Output Voltage Regulation Over line, load and temperature Output Ripple and Noise – 25 MHz bandwidth -3.0 Full load + 10 µF tantalum + 1 µF ceramic 50 Co = 1 µF ceramic + 10 uF tantalum Figure 8 20 mV 0 µs 30 mV 0 µs Dynamic Response Load Change 50%-75%-50% of Iout Max, di/dt = 0.1 A/μs Settling Time to 1% of Vout Load Change 50%-75%-50% of Iout Max , di/dt = 2.5 A/μs Co = 470 µF POS + 1 µF ceramic Figure 9 Settling Time to 1% of Vout Efficiency 100% Load VOUT = 3.3 VDC 90.0 % 50% Load VOUT = 3.3 VDC 88.7 % 2 Operating ambient temperature range is -40ºC to 85ºC Asia-Pacific +86 755 298 85888 Europe, Middle East +353 61 49 8941 North America +1 866 513 2839 © 2023 Bel Fuse Inc. BCD.00775_AB SSQE48T10033 4 These power converters have been designed to be stable with no external capacitors when used in low inductance input and output circuits. However, in some applications, the inductance associated with the distribution from the power source to the input of the converter can affect the stability of the converter. A 33 µF electrolytic capacitor with an ESR < 1 Ω across the input is recommended to ensure stability of the converter over the wide range of input source impedance. In many applications, the user has to use decoupling capacitance at the load. The power converter will exhibit stable operation with external load capacitance up to 20,000 µF. The ON/OFF pin is used to turn the power converter on or off remotely via a system signal. There are two remote control options available, positive and negative logic, both referenced to Vin(-). A typical connection is shown in Fig. A. Vin (+) SSQE48 Converter (Top View) Vout (+) SENSE (+) ON/OFF Vin TRIM Rload SENSE (-) Vin (-) Vout (-) CONTROL INPUT Figure A. Circuit configuration for ON/OFF function. The positive logic version turns on when the ON/OFF pin is at a logic high and turns off when the pin is at a logic low. The converter is on when the ON/OFF pin is left open. See the Electrical Specifications for logic high/low definitions. The negative logic version turns on when the pin is at a logic low and turns off when the pin is at a logic high. The ON/OFF pin can be hard wired directly to Vin(-) to enable automatic power up of the converter without the need of an external control signal. The ON/OFF pin is internally pulled up to 5 V through a resistor. A properly de-bounced mechanical switch, open-collector transistor, or FET can be used to drive the input of the ON/OFF pin. The device must be capable of sinking up to 0.2 mA at a low level voltage of  0.8 V. An external voltage source (±20 V maximum) may be connected directly to the ON/OFF input, in which case it must be capable of sourcing or sinking up to 1 mA depending on the signal polarity. See the Startup Information section for system timing waveforms associated with use of the ON/OFF pin. The remote sense feature of the converter compensates for voltage drops occurring between the output pins of the converter and the load. The SENSE(-) (Pin 5) and SENSE(+) (Pin 7) pins should be connected at the load or at the point where regulation is required (see Fig. B). SSQE48 Converter Vin (+) (Top View) Rw Vout (+) 100 SENSE (+) Vin ON/OFF TRIM Rload SENSE (-) 10 Vin (-) Vout (-) Rw Figure B. Remote sense circuit configuration. tech.support@psbel.com SSQE48T10033 5 CAUTION If remote sensing is not utilized, the SENSE(-) pin must be connected to the Vout(-) pin (Pin 4), and the SENSE(+) pin must be connected to the Vout(+) pin (Pin 8) to ensure the converter will regulate at the specified output voltage. If these connections are not made, the converter will deliver an output voltage that is slightly higher than the specified data sheet value. Because the sense leads carry minimal current, large traces on the end-user board are not required. However, sense traces should be run side by side and located close to a ground plane to minimize system noise and ensure optimum performance. The converter’s output overvoltage protection (OVP) senses the voltage across Vout(+) and Vout(-), and not across the sense lines, so the resistance (and resulting voltage drop) between the output pins of the converter and the load should be minimized to prevent unwanted triggering of the OVP. When utilizing the remote sense feature, care must be taken not to exceed the maximum allowable output power capability of the converter, which is equal to the product of the nominal output voltage and the allowable output current for the given conditions. When using remote sense, the output voltage at the converter can be increased by as much as 10% above the nominal rating in order to maintain the required voltage across the load. Therefore, the designer must, if necessary, decrease the maximum current (originally obtained from the derating curves) by the same percentage to ensure the converter’s actual output power remains at or below the maximum allowable output power. The output voltage can be adjusted up 10% or down 20%. Trim up to 10% is guaranteed only at Vin ≥ 37.5 V, and it is approximately 8% to 10% at Vin = 36V. The TRIM pin should be left open if trimming is not being used. To minimize noise pickup, a 0.1 µF capacitor is connected internally between the TRIM and SENSE(-) pins. To increase the output voltage, refer to Fig. C. A trim resistor, RT-INCR, should be connected between the TRIM (Pin 6) and SENSE(+) (Pin 7), with a value of: RT−INCR = 5.11(100 + Δ)VO−NOM − 626 − 10.22 1.225Δ [kΩ], where, RT−INCR = Required value of trim-up resistor [kΩ] VO−NOM = Nominal value of output voltage [V] Δ= (VO -REQ − VO -NOM ) X 100 VO -NOM [%] VO−REQ = Desired (trimmed) output voltage [V]. When trimming up, care must be taken not to exceed the converter‘s maximum allowable output power. See the previous section for a complete discussion of this requirement. Vin (+) SSQE48 Converter Vout (+) (Top View) SENSE (+) Vin ON/OFF R T-INCR TRIM Rload SENSE (-) Vin (-) Vout (-) Figure C. Configuration for increasing output voltage. To decrease the output voltage (Fig. D), a trim resistor, RT-DECR, should be connected between the TRIM (Pin 6) and SENSE(-) (Pin 5), with a value of: Asia-Pacific +86 755 298 85888 Europe, Middle East +353 61 49 8941 North America +1 866 513 2839 © 2023 Bel Fuse Inc. BCD.00775_AB SSQE48T10033 6 RT−DECR = 511 − 10.22 |Δ| [kΩ] where, RT-DECR = Required value of trim-down resistor [kΩ] and Δ is defined above. Note: The above equations for calculation of trim resistor values match those typically used in conventional industry-standard quarter-bricks, eighth-bricks and sixteenth-bricks. Vin (+) SSQE48 Converter Vout (+) (Top View) SENSE (+) Vin ON/OFF TRIM Rload RT-DECR SENSE (-) Vin (-) Vout (-) Figure D. Configuration for decreasing output voltage. Trimming/sensing beyond 110% of the rated output voltage is not an acceptable design practice, as this condition could cause unwanted triggering of the output overvoltage protection (OVP) circuit. The designer should ensure that the difference between the voltages across the converter’s output pins and its sense pins does not exceed 10% of V OUT(nom), or: [VOUT(+) − VOUT(−)] − [VSENSE(+) − VSENSE(−)]  VO - NOM X 10% [V] This equation is applicable for any condition of output sensing and/or output trim. Input undervoltage lockout is standard with this converter. The converter will shut down when the input voltage drops below a pre-determined voltage. The input voltage must be typically 33.7 V for the converter to turn on. Once the converter has been turned on, it will shut off when the input voltage drops typically below 31.2 V. This feature is beneficial in preventing deep discharging of batteries used in telecom applications. The converter is protected against overcurrent or short circuit conditions. Upon sensing an overcurrent condition, the converter will switch to constant current operation and thereby begin to reduce output voltage. During short circuit, when the output voltage drops significantly below 50% its nominal value, the converter will shut down. Once the converter has shut down, it will attempt to restart nominally every 200 ms with a typical 5-7% duty cycle. The attempted restart will continue indefinitely until the overload or short circuit conditions are removed. Once the output current is brought back into its specified range, the converter automatically exits the hiccup mode and continues normal operation. The converter will shut down if the output voltage across Vout(+) (Pin 8) and Vout(-) (Pin 4) exceeds the threshold of the OVP circuitry. The OVP circuitry contains its own reference, independent of the output voltage regulation loop. Once the converter has shut down, it will attempt to restart every 200 ms until the OVP condition is removed. tech.support@psbel.com SSQE48T10033 7 The converter will shut down under an overtemperature condition to protect itself from overheating caused by operation outside the thermal derating curves, or operation in abnormal conditions such as system fan failure. Converter will automatically restart after it has cooled to a safe operating temperature. The converters are safety approved to UL/CSA 62368-1 and EN/IEC 62368-1. Basic Insulation is provided between input and output. The converters have no internal fuse. If required, the external fuse needs to be provided to protect the converter from catastrophic failure. Refer to the “Input Fuse Selection for DC/DC converters” application note on belfuse.com/powersolutions for proper selection of the input fuse. Both input traces and the chassis ground trace (if applicable) must be capable of conducting a current of 1.5 times the value of the fuse without opening. The fuse must not be placed in the grounded input line. Abnormal and component failure tests were conducted with the input protected by a 20A fuse. If a fuse rated greater than 20A is used, additional testing may be required. To protect a group of converters with a single fuse, the rating can be increased from the recommended value above. EMC requirements must be met at the end-product system level, as no specific standards dedicated to EMC characteristics of board mounted component DC-DC converters exist. However, Bel Power Solutions tests its converters to several system level standards, primary of which is the more stringent EN 55032, Information technology equipment - Radio disturbance characteristics-Limits and methods of measurement. An effective internal LC differential filter significantly reduces input reflected ripple current, and improves EMC. With the addition of a simple external filter, all versions of the SSQE48T10033 converters pass the requirements of Class B conducted emissions per EN 55032 and FCC requirements. Please contact Bel Power Solutions Applications Engineering for details of this testing. Scenario #1: Initial Startup From Bulk Supply ON/OFF function enabled, converter started via application of VIN. See Figure E. Comments ON/OFF pin is ON; system front-end power is toggled on, VIN to converter begins to rise. t1 VIN crosses undervoltage Lockout protection circuit threshold; converter enabled. t2 Converter begins to respond to turn-on command (converter turn-on delay). t3 Converter VOUT reaches 100% of nominal value. For this example, the total converter startup time (t3- t1) is typically 3 ms. VIN Time t0 ON/OFF STATE OFF ON VOUT t0 t1 t2 t t3 Figure E. Startup scenario #1. Asia-Pacific +86 755 298 85888 Europe, Middle East +353 61 49 8941 North America +1 866 513 2839 © 2023 Bel Fuse Inc. BCD.00775_AB SSQE48T10033 8 Scenario #2: Initial Startup Using ON/OFF Pin With VIN previously powered, converter started via ON/OFF pin. See Figure F. Time VIN Comments t0 VINPUT at nominal value. t1 t2 Arbitrary time when ON/OFF pin is enabled (converter enabled). End of converter turn-on delay. t3 Converter VOUT reaches 100% of nominal value. For this example, the total converter startup time (t3- t1) is typically 3 ms. ON/OFF STATE OFF ON VOUT t0 t1 t2 t t3 Figure F. Startup scenario #2. Scenario #3: Turn-off and Restart Using ON/OFF Pin With VIN previously powered, converter is disabled and then enabled via ON/OFF pin. See Figure G. Comments VIN and VOUT are at nominal values; ON/OFF pin ON. ON/OFF pin arbitrarily disabled; converter output falls to zero; turn-on inhibit delay period (200 ms typical) is initiated, and ON/OFF pin action is internally inhibited. t2 ON/OFF pin is externally re-enabled. If (t2- t1) ≤ 200 ms, external action of ON/OFF pin is locked out by startup inhibit timer. If (t2- t1) > 200 ms, ON/OFF pin action is internally enabled. t3 Turn-on inhibit delay period ends. If ON/OFF pin is ON, converter begins turn-on; if off, converter awaits ON/OFF pin ON signal; see Figure F. t4 End of converter turn-on delay. t5 Converter VOUT reaches 100% of nominal value. For the condition, (t2- t1) ≤ 200 ms, the total converter startup time (t5- t2) is typically 203 ms. For (t2- t1) > 200 ms, startup will be typically 3 ms after release of ON/OFF pin. V IN Time t0 t1 ON/OFF STATE 200 ms OFF ON V OUT t0 t1 t2 t3 t4 t5 t Figure G. Startup scenario #3. The converters have been characterized for many operational aspects, to include thermal derating (maximum load current as a function of ambient temperature and airflow) for vertical and horizontal mounting, efficiency, startup and shutdown parameters, output ripple and noise, transient response to load step-change, overload, and short circuit. The following pages contain specific plots or waveforms associated with the converter. Additional comments for specific data are provided below. All data presented were taken with the converter soldered to a test board, specifically a 0.060” thick printed wiring board (PWB) with four layers. The top and bottom layers were not metallized. The two inner layers, comprised of two-ounce copper, were used to provide traces for connectivity to the converter. The lack of metallization on the outer layers as well as the limited thermal connection ensured that heat transfer from the converter to the PWB was minimized. This provides a worst-case but consistent scenario for thermal derating purposes. All measurements requiring airflow were made in the vertical and horizontal wind tunnel using Infrared (IR) thermography and thermocouples for thermometry. Ensuring components on the converter do not exceed their ratings is important to maintaining high reliability. If one anticipates operating the converter at or close to the maximum loads specified in the derating curves, it is prudent to check actual tech.support@psbel.com SSQE48T10033 9 operating temperatures in the application. Thermographic imaging is preferable; if this capability is not available, then thermocouples may be used. The use of AWG #40 gauge thermocouples is recommended to ensure measurement accuracy. Careful routing of the thermocouple leads will further minimize measurement error. Refer to Fig. H for the recommended measuring thermocouple location. Load current vs. ambient temperature and airflow rates are given in Figure 1. Ambient temperature was varied between 25°C and 85 °C, with airflow rates from 30 to 500 LFM (0.15 to 2.5 m/s). For each set of conditions, the maximum load current was defined as the lowest of: (i) (ii) (iii) The output current at which any FET junction temperature does not exceed a maximum specified temperature of 125°C as indicated by the thermographic image, or The temperature of the transformer does not exceed 125°C, or The nominal rating of the converter. During normal operation, derating curves with maximum FET temperature less or equal to 125°C should not be exceeded. Temperature at thermocouple location shown in Fig. H should not exceed 100°C in order to operate inside the derating curves. Fig. H: Location of the thermocouple for thermal testing. Figure 2 shows the efficiency vs. load current plot for ambient temperature of 25ºC, airflow rate of 300 LFM (1.5 m/s) with vertical mounting and input voltages of 36 V, 48 V, and 72 V. Also, a plot of efficiency vs. load current, as a function of ambient temperature with Vin = 48 V, airflow rate of 200 LFM (1 m/s) with vertical mounting is shown in Figure 3. Figure 4 shows the power dissipation vs. load current plot for Ta = 25ºC, airflow rate of 300 LFM (1.5 m/s) with vertical mounting and input voltages of 36 V, 48 V, and 72 V. Also, a plot of power dissipation vs. load current, as a function of ambient temperature with Vin = 48 V, airflow rate of 200 LFM (1 m/s) with vertical mounting is shown in Figure 5. Output voltage waveforms during the turn-on transient using the ON/OFF pin for full rated load currents (resistive load) are shown without and with external load capacitance in Figure 6 and Figure 7, respectively. Figure 10 shows the output voltage ripple waveform, measured at full rated load current with a 10 µF tantalum and 1 µF ceramic capacitor across the output. Note that all output voltage waveforms are measured across a 1 µF ceramic capacitor. The input reflected-ripple current waveforms are obtained using the test setup shown in Figure 11. Asia-Pacific +86 755 298 85888 Europe, Middle East +353 61 49 8941 North America +1 866 513 2839 © 2023 Bel Fuse Inc. BCD.00775_AB SSQE48T10033 10 12 Load Current [Adc] 10 8 6 500 LFM (2.5 m/s) 400 LFM (2.0 m/s) 300 LFM (1.5 m/s) 200 LFM (1.0 m/s) 100 LFM (0.5 m/s) NC - 30 LFM (0.15 m/s) 4 2 0 20 30 40 50 60 70 80 90 Ambient Temperature [°C] Figure 1. Available load current vs. ambient air temperature and airflow rates for SSQE48T10033 converter mounted vertically with air flowing from pin 1 to pin 3, Vin = 48 V. Note: NC – Natural convection 0.9 Efficiency Efficiency 0.9 0.8 72 V 48 V 36 V 0.7 0.8 70 C 55 C 40 C 0.7 0.6 0.6 0 2 4 6 8 0 10 2 4 6 8 10 Load Current [Adc] Load Current [Adc] Figure 2. Efficiency vs. load current and input voltage for SSQE48T10033 converter mounted vertically with air flowing from pin 1 to pin 3 at a rate of 300 LFM (1.5 m/s) and Ta=25C. Figure 3. Efficiency vs. load current and ambient temperature for SSQE48T10033 converter mounted vertically with Vin = 48 V and air flowing from pin 1 to pin 3 at a rate of 200LFM (1.0m/s). 6.00 5.00 4.00 4.00 3.00 2.00 75 V 48 V 36 V 1.00 Power Dissipation [W] Power Dissipation [W] 5.00 3.00 2.00 70 C 55 C 40 C 1.00 0.00 0 2 4 6 8 10 0.00 0 2 4 6 8 10 Load Current [Adc] Load Current [Adc] Figure 4. Power dissipation vs. load current and input voltage for SSQE48T10033 converter mounted vertically with air flowing from pin 1 to pin 3at a rate of 300 LFM (1.5 m/s) and Ta = 25 C. Figure 5. Power dissipation vs. load current and ambient temperature for SSQE48T10033 converter mounted vertically with Vin = 48 V and air flowing from pin 1 to pin 3at a rate of 200 LFM (1.0 m/s). tech.support@psbel.com SSQE48T10033 11 Figure 6. Turn-on transient at full rated load current (resistive) with no output capacitor at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: Output voltage (1.0 V/div.). Time scale: 5 ms/div. Figure 7. Turn-on transient at full rated load current (resistive) plus 20,000 µF at Vin = 48 V, triggered via ON/OFF pin. Top trace: ON/OFF signal (5 V/div.). Bottom trace: Output voltage (1 V/div.). Time scale: 5 ms/div. Figure 8. Output voltage response to load current step-change (5 A–7.5 A–5 A) at Vin = 48 V. Top trace: output voltage (50 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 0.1 A/µs. Co = 1µF ceramic + 10µF tantalum. Time scale: 0.2ms/div. Figure 9. Output voltage response to load current step-change (5 A–7.5 A–5 A) at Vin = 48 V. Top trace: output voltage (100 mV/div.). Bottom trace: load current (5 A/div.). Current slew rate: 5 A/µs. Co = 470 µF POS + 1µF ceramic. Time scale: 0.2 ms/div. iS 10 H source inductance Vsource Figure 10. Output voltage ripple (20 mV/div.) at full rated load current into a resistive load with Co = 10 µF tantalum + 1 µF ceramic and Vin = 48 V. Time scale: 1 µs/div. iC 33 F ESR < 1  electrolytic capacitor SSQE48 DC-DC Converter 1 F Ceramic + 10 F Vout Tantalum Capacitor Figure 11. Test setup for measuring input reflected ripple currents, ic and is. Asia-Pacific +86 755 298 85888 Europe, Middle East +353 61 49 8941 North America +1 866 513 2839 © 2023 Bel Fuse Inc. BCD.00775_AB SSQE48T10033 12 Figure 12. Input reflected-ripple current, is (10 mA/div.), measured through 10 µH at the source at full rated load current and Vin = 48 V. Refer to Figure 11 for test setup. Time scale: 1 µs/div. Figure 13. Input reflected ripple-current, ic (100 mA/div.), measured at input terminals at full rated load current and Vin = 48 V. Refer to Figure 11 for test setup. Time scale: 1 µs/div. Figure 14. Output voltage vs. load current showing current limit point and converter shutdown point. Input voltage has almost no effect on current limit characteristic. Figure 15. Load current (top trace, 20 A/div., 50 ms/div.) into a 10 m short circuit during restart, at Vin = 48 V. Bottom trace (20 A/div., 5 ms/div.) is an expansion of the on-time portion of the top trace tech.support@psbel.com SSQE48T10033 13 PAD / PIN CONNECTIONS Pad/Pin # Function 1.300±0.020 [33.02±0.51] 0.100 [2.54] 0.150 [3.81] 1.100 [27.94] 0.600 [15.24] 0.150 [3.81] 4X 0.900±0.020 [22.86±0.51] 0.300 [7.62] 2X 1 Vin (+) 2 ON/OFF 3 Vin (-) 4 Vout (-) 5 SENSE(-) 6 TRIM 7 SENSE(+) 8 Vout (+) PL Pin Length Pin Option ±0.005 [±0.13] A 0.188 [4.78] B 0.145 [3.68] C 0.110 [2.79] SSQE48T Pinout (Through-hole) SSQE48T Platform Notes • • • • • • HT (Max. Height) +0.000 [+0.00] -0.038 [- 0.97] CL (Min. Clearance) +0.016 [+0.41] -0.000 [- 0.00] A 0.374 [9.5] 0.027 [0.7] All dimensions are in inches [mm] Pins 1-3 and 5-7 are Ø 0.040” [1.02] with Ø 0.078” [1.98] shoulder Pins 4 and 8 are Ø 0.062” [1.57] without shoulder Pin material: Brass Pin Finish: Matte Tin over Nickel Converter Weight: 0.44 oz [12.3 g] PRODUCT SERIES INPUT VOLTAGE MOUNTING SCHEME RATED LOAD CURRENT OUTPUT VOLTAGE SSQE 48 T 10 033 Sixteenth Brick Format Height Option 36-75 V T Throughhole 10  10 ADC 033  3.3 V - ON/OFF LOGIC MAXIMUM HEIGHT [HT] PIN LENGTH [PL] N A B N Negative P Positive A  0.374” Through hole A  0.188” B  0.145” C  0.110” SPECIAL FEATURES RoHS 0 G 0  No special features N  Sink current during start-up is limited to 50 mA No Suffix  RoHS lead-solderexemption compliant G  RoHS compliant for all six substances The example above describes P/N SSQE48T10033-NAB0G: 36-75 V input, through-hole, 10 A @ 3.3 V output, negative ON/OFF logic, 0.145” pins, maximum height of 0.374”, standard feature set, and RoHS compliant for all 6 substances. Consult factory for availability of other options NUCLEAR AND MEDICAL APPLICATIONS - Products are not designed or intended for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems. TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are subject to change without notice. Asia-Pacific +86 755 298 85888 Europe, Middle East +353 61 49 8941 North America +1 866 513 2839 © 2023 Bel Fuse Inc. BCD.00775_AB
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