REC20-2412S RECOM POWER

6-Side Shielding External ON/OFF control Features 1.6kVDC Isolation DC/DC Converter UL/CSA/EN-60950-1 Certified 2:1 Input Voltage Range Regulated Continuous Short Circuit Protection Efficiency up to 90.5% Converters REC20 Fixed Switching Frequency Description 20 Watt The REC20-xxxxS D-series offer single and dual regulated outputs in a 2x1 package with 1.6kVDC isolation and are suitable for higher power industrial applications. Remote on/off control is standard. 2 x 1 The higher current outputs have raised output voltages to compensate for track losses as standard. The converter is fully certified to UL/EN/IEC safety standards. Single and Dual Output Selection Guide Part Input Output Output Efficiency max. Capacitive Number Voltage Range Voltage Current typ. Load VDC VDC mA % F REC20-123.4S 9-18 3.4 5000 85 10000 REC20-125.1S 9-18 5.1 4000 89 6800 REC20-1212S 9-18 12 1670 88.5 1800 REC20-1215S 9-18 15 1340 88.5 1000 REC20-1212D 9-18 12 835 89 800 REC20-1215D 9-18 15 670 89 500 REC20-243.4S 18-36 3.4 5000 86 10000 REC20-245.1S 18-36 5.1 4000 90 6800 REC20-2412S 18-36 12 1670 89 1800 E224736 REC20-2415S 18-36 15 1340 90 1000 IEC/EN60950-1 Certified REC20-2412D 18-36 12 835 89.5 800 UL60950-1 Certified CSA C22.2 NO. 60950 Certified REC20-2415D 18-36 15 670 89.5 500 EN55022 Certified REC20-483.4S 36-75 3.4 5000 86.5 10000 REC20-485.1S 36-75 5.1 4000 89 6800 REC20-4812S 36-75 12 1670 89 1800 REC20-4815S 36-75 15 1340 90 1000 REC20-4812D 36-75 12 835 89.5 800 REC20-4815D 36-75 15 670 90.5 500 Model Numbering REC20- nom. Input Voltage Single or Dual Output Voltage Ordering Examples: REC20-4812S, Single Output, 36-75Vin and 12Vout REC20-2412D, Dual Output, 18-36Vin and 12Vout www.recom-power.com REV.: 3/2017 ECO-1REC20 DC/DC Converter Series Specifications (measured ta= 25C, nominal input voltage, full load and after warm up unless otherwise specified) BASIC CHARACTERISTICS Parameter Condition Min. Typ. Max. nom. Vin= 12V 9VDC 18VDC Input Voltage Range nom. Vin= 24V 18VDC 36VDC nom. Vin= 48V 36VDC 75VDC Start/up Time 10ms DC-DC ON 8.6VDC nom. Vin= 12V DC-DC OFF 7.8VDC DC-DC ON 17.6VDC Under Voltage Lockout (UVLO) nom. Vin= 24V DC-DC OFF 16.8VDC DC-DC ON 34.6VDC nom. Vin= 48V DC-DC OFF 33.8VDC see calculation below 10% Output Voltage Trimming DC-DC ON Open or 3V<Vr<12V CTRL ON/OFF DC-DC OFF Short or 0V<Vr<1.2V 350kHz Internal Operating Frequency Minimum Load 0% (1) Output Ripple and Noise 100mVp-p Notes: Note1: Ripple and Noise is measured with a 20MHz bandwidth and a 0.1F ceramic capacitor. Output Voltage Trimming Trim UP Trim DOWN +Vout +Vout R1 R1 Vout 3.4V 5.1V 12V 15V R1 R R1 R down down R1 Trim 2.1 k 2.21 k 8.87 kTrim 6.04 k Vref Vref Trim Trim Vref Vref R2 1.2 k 2.1 k 2.4 k 1.2 k R3 R3 R3 R3 R3 4.7 k 7.32 k 15.0 k 9.76 k R R R2 up R2 up R2 R2 Vref 1.24 V 2.5 V -Vout -Vout Trim Calculation DVout = Vout - Vout Vout = nom. output voltage trimmed DVout = output voltage trim R = trim up resistor a*R2 Vref up R = q r - R3 = k a = q r * R1 = k up (Vout + DVout) - Vref R = trim down resistor R2 - a down a = trim up factor b = trim down factor b*R1 (Vout + DVout) - Vref R = q r - R3 = k b = q r * R2 = k down Vref R1 - b Trim Up: Vout = 5.1V, DVout = 0.51V (10%), Vref= 2.5V 2.5V 1.771k * 2.1k a = q r * 2.21k = 1.771k R = q r - 7.32 = 3.977k up (5.1V + 0.51V) - 2.5V 2.1k - 1.771k Trim down: Vout = 5.1V, DVout = -0.51V (-10%), Vref= 2.5V 5.1V + (-0.51V) - 2.5V 1.756k * 2.21k b = q r * 2.1k = 1.756k R = q r - 7.32k = 1.219k down 2.5V 2.21k - 1.756 continued on next page ECO-2 REV.: 3/2017 www.recom-power.com