DC-DC 20 Watts xppower.com WE Series • High Power Density • Fully Regulated Outputs • Efficiency to 86% • Low Voltage Outputs • Remote On/Off • 2:1 Input Range • 2.5, 3.3 & 5 V Versions Specification Input Input Voltage Range Input Current Input Filter Undervoltage Lockout General • 24 V (18-36 VDC) 48 V (36-72 VDC) • See table • Pi network • Turn On > 62% nominal input Turn Off < 61% nominal input Output Output Voltage Output Voltage Adjustment Minimum Load Line Regulation Load Regulation Transient Response Ripple & Noise Overcurrent Protection Short Circuit Protection Temperature Coefficient Remote On/Off • 2.5, 3.3, 5 V single • ±10% • • • • • • • • 10% ±0.2% max ±1.0% max for 25% to 100% load change <500 µs for a 25% step load change 75mV pk-pk max, 20MHz BW 110-140% of nominal Continuous ±0.02 /°C max • On > 5.5 VDC or open circuit Off < 1.8 VDC, control common referenced to -Vin Efficiency Isolation Switching Frequency MTBF • • • • See table 500 VDC Input to Output 500 kHz typical 1,500 kHrs to MIL-HDBK-217F • • • • -40 ˚C to +70 ˚C +100 ˚C max -40 ˚C to +100 ˚C Six-sided continuous shield Environmental Operating Temperature Case Temperature Storage Temperature EMI/RFI EMC & Safety Emissions ESD Immunity Radiated Immunity Conducted Immunity • EN55022, level A Conducted EN55022, level A Radiated • EN61000-4-2, level 2 Perf Criteria A • EN61000-4-3 3 V/m Perf Criteria A • EN61000-4-6 3 V rms Perf Criteria A Input Voltage (1) 18-36 VDC 36-72 VDC Input Current (2) No Load Full Load Output Voltage Output Current Efficiency Model Number 2.5 VDC 5000 mA 35 mA 3.3 VDC 5000 mA 45 mA 645 mA 81% WE320 828 mA 83% 5.0 VDC 4000 mA WE300 45 mA 981 mA 84% WE301 2.5 VDC 3.3 VDC 5000 mA 25 mA 318 mA 82% WE420 5000 mA 35 mA 410 mA 84% 5.0 VDC WE400 4000 mA 35 mA 485 mA 86% WE401 Notes 1. Nominal input voltage is 24 VDC for WE3xx model numbers and 48 VDC for WE4xx model numbers. 2. Input current is at nominal input voltage. Mechanical Details All dimensions are in inches (mm) Weight: 0.08 lbs (35 g) approx. Case Material: Copper with non-conductive base 2.00 (50.8) 0.40 (10.2) 0.22 (5.6) min 0.10 (2.54) 1.80 (45.7) 0.20 (5.1) 6 3 0.20 (5.1) 0.40 (10.2) 1.00 (25.4) 2 BOTTOM VIEW 5 0.40 (10.2) 0.40 (10.2) 1 0.20 (5.1) 4 0.10 (2.54) +Vout (6) +Vout (6) +Vout (6) TRIM DOWN PIN CONNECTIONS TRIM (4) TRIM (4) TRIM (4) +Vout (5) +Vout (5) TRIM UP +Vout (5) Typical resistor values To Trim Up 6k8 = +10% 100k = +1% To Trim Down 6k8 = -10% 100k = -1% Pin Function 1 Remote On/Off 2 -V input 3 +V input 4 Trim 5 -V output 6 +V output 04/04/05 DC-DC WE Series Models and Ratings