• SINGLE OUTPUT UP TO 35A • INDUSTRY STANDARD FOOTPRINT • NO MINIMUM LOAD • ADJUSTABLE OUTPUT VOLTAGE • UNDER-VOLTAGE LOCKOUT • HIGH EFFICIENCY UP TO 90% • COMPACT 2.28 X 1.45 X 0.50 INCH PACKAGE • FIXED SWITCHING FREQUENCY QEB125 single output DC/DC converters provide up to 125 watts of output power in an industry standard quarter-brick package and footprint. These units are specifically designed to meet the power needs of low-voltage silicon. All models feature a wide input range, trimmable output voltage and a 35A current rating. Remote sense and remote on/off facilities are included as standard, and the converters are comprehensively protected against over-current, over-voltage and over-temperature conditions. The QEB125 converters are especially suited to telecom, networking and industrial application. UL E193009 TUV R50020744 CB JPTUV-5363 CE MARK T E C H N I C A L S P E C I F I C AT I O N All specifications are typical at nominal input, full load and 25ºC otherwise noted OUTPUT SPECIFICATIONS GENERAL SPECIFICATIONS Output power 125 Watts max Voltage accuracy Full load and nominal Vin Voltage adjustability (Note1) ± 1.5% None Line regulation LL to HL at FL Load regulation No load to Full load ±0.2% See table Remote Sense 10% of Vout 20MHz bandwidth (Measured with a 1uF M/C and a 10uF T/C) 100mVp-p 0.02% / ºC, max Temperature coefficient Transient response recovery time See table Input to Output Input to Case Output to Case Isolation voltage + 10% , -20% Minimum load Ripple and noise Efficiency 25% load step change Over voltage protection threshold(Non-latching Hiccup) 200uS 120% Vout max 7 Isolation resistance 10 ohms, min Isolation capacitance 2500 pF, max Switching frequency 270 KHz, typ Approvals and standard IEC60950, UL60950, EN60950 Case material Aluminum base plate Weight (approx) MTBF 42g (1.46 oz) Bellcore TR-NWT-000332, Tc=40 ºC , Io=80%,max 110% ~ 140% of lout Rated Short circuit protection Hiccup, automatics recovery INPUT SPECIFICATIONS Over temperature protection 48V nominal input Under voltage lockout Power up Power down 36 – 75VDC 34V typ. 32V typ. Vibration 110ºC, max MIL-STD-810D 10~55Hz, 2G, 3minutes period, 30minutes along X,Y and Z Humidity , Max , Non-Condensing Input filter (Note 2) L-C type EMC CHARACTERISTICS Input surge voltage 100mS max 100VDC Conducted emissions Nominal Vin and constant resistor load Power up Remote ON/OFF Remote ON/OFF (Note3) (Negative logic) (Positive logic) DC-DC DC-DC DC-DC DC-DC ON OFF ON OFF 25mS typ 25mS typ ION/OFF = 1mA max Short or 0V < Vr < 1.2V Open or 3.5V < Vr < 15V Open or 3.5V < Vr < 15V Short or 0V < Vr < 1.2V -40ºC to +100ºC -55ºC to +125ºC Storage temperature range Thermal shock Input voltage range 2.5 x 106 hrs ENVIRONMENTAL SPECIFICATIONS Operating base-plate temperature range (Note 4) Over Current Protection threshold Start up time 1600VDC,min 1000VDC,min 1000VDC,min Radiated emissions EN55022 (Note 5) EN55022 (Note 5) EN55022 ESD Radiated immunity Fast transient Surge Conducted immunity EN61000-4-2 EN61000-4-3 EN61000-4-4 EN61000-4-5 EN61000-4-6 95% Level A Level B Level A Perf. Criteria2 Perf. Criteria2 Perf. Criteria2 Perf. Criteria2 Perf. Criteria2 Input Range Model Number Output Voltage Output Current (6) Eff (%) Load regulation QEB125-48S1P8 36 – 75 VDC 1.8 VDC 35A 84 5.4mV QEB125-48S2P5 36 – 75 VDC 2.5 VDC 35A 86 7.5mV QEB125-48S3P3 36 – 75 VDC 3.3 VDC 30A 88 10mV QEB125-48S05 36 – 75 VDC 5 VDC 25A 90 15mV Note 1. 2. 3. 4. 5. 6. 7. 8. Maximum output deviation is 10% inclusive of trim. If remote sense is not being used, the +V sense should be connected to its corresponding +OUTPUT and likewise the –sense should be connected to its corresponding –OUTPUT. An external filter capacitor is required for normal operation. The capacitor should be capable of handing 1A ripple current for 48V models. Power mate suggest: Nippon chemi-con KMF series, 220F/100V, ESR 90m. The negative / positive logic and pin length are optional ( see table ). The pin voltage is referenced to negative input. Heat sink is optional and P/N7G-00297G-00307G-00317G-0032. The QEB125 meets level A and level B conducted emissions only with external components connected before the input pin to the converter. Typical value at nominal input voltage and full load BASEPLATE GROUNGINGBase-plate should be grounded at one of the four screw bolts prior to operation. The converter is provided by basic insulation. (7) EXTERNAL OUTPUT TRIMMING Output can be externally trimmed by using the method shown below. TRIM UP TRIM DOWN 7 6 RU 6 RD 5 PIN CONNECTION PIN Define 1 2 3 4 5 6 7 8 - INPUT ON/OFF + INPUT - OUTPUT - SENSE TRIM + SENSE + OUTPUT PRODUCT OPTIONS TABLE Option Suffix Negative remote ON/OFF logic, 0.20” pin length (standard) - Negative remote ON/OFF logic, 0.145” pin length -L Negative remote ON/OFF logic, 0.11” pin length -K Positive remote ON/OFF logic, 0.20” pin length -P Positive remote ON/OFF logic, 0.145” pin length -S Positive remote ON/OFF logic, 0.11” pin length -M Example QEB125-48S3P3-P