. DC-DC Converters Bus Converter Power Module Type Low Profile Isolated Safety OCP OVP Remote Approvals ON/OFF CQHS-series Feature Optional parts Compact DC-DC Converter, BRICK SIZE which has been Heat sink (optional parts : CQHS300/CQHS350) standard size for Telecommunication Market High efficiency (synchronous rectifier circuit) High density High reliability : not built-in aluminum and tantalum electrolytic capacitor Built-in overcurrent, overvoltage and thermal protection circuits Built-in remote ON/OFF Mounting hole (M3 tapped) CE marking Low Voltage Directive RoHS Directive Safety agency approvals UL60950-1, C-UL, EN60950-1 5-year warranty June 26, 2020 CQHS-1. Ordering information DC-DC Converters Bus Converter Power Module Type CQH S 250 48 50 -O CQHS250 1 2 3 4 5 6 1 Ser ies name R 2 Single output 3 Output wattage 4 Input voltage 48:DC36 - 76V 5 Output voltage 6 Optional R : with Remote ON/OFF Positive logic control N : Auto restart in protection circuit working B : Base plate option with Mounting hole M3 L2 :Pin length 5.3mm MODEL CQHS2504832 CQHS2504850 MAX OUTPUT WATTAGE W 252.8 250 DC OUTPUT 32V 7.9A 50V 5.0A SPECIFICATIONS MODEL CQHS2504832 CQHS2504850 VOLTAGE V DC36 - 76 *1 CURRENT A 5.60typ 5.54typ *1 INPUT EFFICIENCY % 94typ 94typ START-UP VOLTAGE V DC32 - 36 HYSTERESIS VOLTAGE V DC2 min VOLTAGE V 32 50 CURRENT A 7.9 5.0 LINE REGULATION mV 64max 100max LOAD REGULATION mV 64max 100max -20 to +85C *2 255max 400max Vin=36-60V -20 to +85C RIPPLE mVp-p *2 320max 500max Vin=60-76V -40 to -20C *2 320max 500max OUTPUT *2 -20 to +85C 320max 500max RIPPLE NOISE mVp-p *2 -40 to -20C 410max 650max TEMPERATURE REGULATION mV -40 to +85C 640max 1000max *3 DRIFT mV 120max 185max START-UP TIME ms 200max (DCIN 48V, Io=100%) Fixed (TRM pin open), adjustable by external resistor *4 OUTPUT VOLTAGE ADJUSTMENT RANGE V 26.88 - 35.20 45.0 - 55.0 *1 OUTPUT VOLTAGE SETTING V 31.68 - 32.32 49.50 - 50.50 OVERCURRENT PROTECTION Works over 105% of rating, low voltage protection (shut down) function is built-in. PROTECTION OVERVOLTAGE PROTECTION V 36.80 - 44.80 56.50 - 67.50 CIRCUIT AND REMOTE SENSING Provided OTHERS REMOTE ON/OFF Provided (Negative Logic L : ON, H :OFF) INPUT-OUTPUT DC1,500V or AC500V 1minute, Cutoff current = 10mA, DC500V 50MW min (2015C) *5 ISOLATION INPUT-BASE PLATE DC1,500V or AC500V 1minute, Cutoff current = 10mA, DC500V 50MW min (2015C) OUTPUT-BASE PLATE *5 AC500V 1minute, Cutoff current = 100mA, DC500V 50MW min (2015C) OPERATING TEMP.,HUMID.AND ALTITUDE -40 to +85C, 20 - 95%RH (Non condensing) (Refer to Derating), 3,000m (10,000 feet) max STORAGE TEMP.,HUMID.AND ALTITUDE -40 to +100C, 20 - 95%RH (Non condensing), 9,000m (30,000 feet) max ENVIRONMENT 2 VIBRATION 10 - 55Hz, 49.0m/s (5G), 3minutes period, 60minutes each along X, Y and Z axis 2 IMPACT 196.1m/s (20G), 11ms, once each along X, Y and Z axis SAFETY AGENCY APPROVALS UL60950-1, C-UL (CSA60950-1), EN60950-1 57.9X10.5X22.76mm 2.28X0.41X0.9 inches (WXHXD) / 30g max CASE SIZE/WEIGHT *5 OTHERS 58.4X12.7X23.26mm 2.3X0.5X0.92 inches (WXHXD) / 45g max COOLING METHOD Convection / Forced air / Conduction *1 At rated input(DC48V), rated load. Ta= 25C, 2m/s. *2 Ripple and r ipple noise is measured by using measuring board. Refer to the manual. *3 Dr ift is the change in DC output for an eight hour period after a half-hour warm-up at 25C, with the input voltage held constant at the rated input/output. *4 When the input v oltage is in the range of DC36-40V, output voltage is limited. Refer to the manual. *5 Base Plate Option. June 26, 2020 CQHS-2