UM3500 ETC1 | Alldatasheet
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UM3500 1 of 2 REV. 1 UNIVERSAL MICROELECTRONICS 3,27TH RD., TAICHUNG INDUSTRIAL PARK, TAICHUNG, TAIWAN, R.O.C. TEL: 886-4-23590096 FAX: 886-4-23590129 UM3500 SERIES
40 Watts DC-DC Converters
♦ Synchronous-Rectifier Topology ♦ Remote On/Off Control ♦ Continuous Short Circuit Protection ♦ High Efficiency ♦ Non-Isolated ♦ Current Share Function SPECIFICATIONS All specifications are typical at nomina l line, full load and 25°C unless otherwise noted. INPUT SPECIFICATIONS OUTPUT SPECIFICATIONS Transient Response(25% Step Load Change) ….. <500 μS Ripple and Noise, 20MHz BW3 ………….… 75mV P -P max. Temperature Coefficient ……………….…±0.02%/°C max. Short Circuit Protection .…………………..…… Continuous Automatic Recovery GENERAL SPECIFICATIONS Operating Temperature Range 4 ….…….… -25°C to +100°C (50.8 x 25.4 x 10.2mm) Case Material ………..………… Black -Coated Copper with Non -Conductive Base NOTES: 1. Measure from high line to low line. 2. Measure from full load to 1/2 load. 3. Measured with 1uF ceramic ca p. Connected to the output pins. 4. Output Power 100% Operating Temperature -25 50 100 (°C) Maximum case temperature must not be exceeded 100°C. 5. UM3500 series can be used as parallel connection to provide current share function. The current that each converter delivers will thus be 1/N of the total current, if there are N total converters in parallel. Limitations to this scheme are dependen t primarily on matching of the resistances in the converter: mismatch in resistance results in one converter delivering more current than another. When using this current share function, Pin 1(SYNC) and Pin 3(PWM) must be connected to each other or be floa ting if used as single unit. REMOTE ON/OFF CONTROL Logic Compatibility…………….CMOS or Open Collector TTL Converter ON.………… .…………>+2.5 VDC or Open Circuit Converter OFF…………………….< +0.8 VDC or Short Circuit Control Common……………..…….Referenced to Input Minus Mespek Oy, PL103, 00701 Helsinki Puh. (09)3507360 Fax (09)3453384 E-mail: mespek@mespek.com http://www.mespek.com
UM3500 2 of 2 REV. 1 UNIVERSAL MICROELECTRONICS 3,27TH RD., TAICHUNG INDUSTRIAL PARK, TAICHUNG, TAIWAN, R.O.C. TEL: 886-4-23590096 FAX: 886-4-23590129 INPUT CURRENT MODEL NUMBER INPUT VOLTAGE OUTPUT VOLTAGE OUTPUT CURRENT NO LOAD FULL LOAD EFF (min.) CASE UM3501 5 VDC 3.3 VDC 12A 70 mA 9103 mA 87 B UM3511 12 VDC 3.3 VDC 10A 50 mA 3235 mA 85 B NOTE: Other output voltage can be supp orted upon request. CASE B PIN CONNECTIONS Pin Number Pin Function
1 SYNC
2 Remote On/Off
3 PWM
All dimensions in inches (mm). Tolerance .xx =±0.04 .xxx=±0.010 (5.08) 0.200" 0.800" 1.00" 0.300" (2.54)0.10" 0.200" 0.10" (2.54) (5.08) 7 6 (7.62) 0.40" (25.40) (20.32) (4.6±0.5) (10.20) 5 4 VIEW 0.040"±0.005" (5.08) 0.200" 0.300" (7.62) 1 2 3 (1.0 DIA.) 0.18"±0.02" (1.6 DIA.) 0.063"±0.01"