WALL INDUSTRIES, INC. APPLICATION NOTES LPQ SERIES Model No. LPQ48S5-50R Technical Specifications All specifications are based on 25C, Nominal Line and Full Load unless otherwise noted. We reserve the right to change specifications based on technological advances. SPECIFICATION Related condition MIN INPUT Turn on at Turn off at Input Over voltage Shutdown Turn off at Turn on at Operating Voltage Range Maximum Input Current No Load Input Current Input Current under “LOGIC OFF” Inrush Current Transient Rating Reflected Ripple Current OUTPUT Output Voltage Set point Output Voltage Regulation Over Load Over Line Over Temperature Output Voltage Ripple and Noise Basic Ripple Spikes P-P Output Current Ranges Output Current Limit Short Term Output Current Surge DYNAMIC CHARACTERISTICS Input Voltage Ripple Rejection Output Transient and Load Changes Load step / ∆ V Load step / ∆ V Recovery Time Turn on Delay Overshoot of Output Voltage EFFICIENCY @ 100% load @ 75% load @ 50% load @ 25% load TEMPERATURE CONSIDERATIONS Thermal Resistance Normal Convection 100 lfm 200 lfm 300 lfm 400 lfm Heatsink Considerations General Technical Data Switching Frequency Remote ON OFF Control Trimmablility Over Temperature Shutdown MTBF Rated Input Voltage Low Line 100% load 12 uH / 33 uF input filter 4.95 MAX Volt DC Volt DC n/a n/a 48 1.55 74 1 1 4 Volt DC Volt DC Volt DC A mA mA A2 Sec mA 5 47 60 Rated Output Current Self Resetting 0 11 Unit Measured 35 34 75 5.05 ± 0.2 ± 0.2 0.02 13 Volt DC % % % / oC 100 100 10 15 mV mV A A A/sec 120 Hz 60 dB 50 to 75% 50 to 100% 75 to 50% 100 to 50 % To within 1% Rated Vo From Vin(nom) to 90% Vout (nom) Full Load Resistive 75 60 50 65 0 mV mV µsec msec % 92 91 88 80 % % % % X X o C/Watt C/Watt o C/Watt o C/Watt o C/Watt Rθc-a o Available, Contact Factory 330 Fixed Acitve HIGH or LOW 4.5 5.5 125 PCB Temperature Bellcore TR-332 (888) 597-WALL 36 NOM www.wallindustries.com 1.81 E6 KHz High/Low TTL Volt DC o C Hours 1 WALL INDUSTRIES, INC. APPLICATION NOTES LPQ SERIES OUTPUT POWER (WATTS) DERATING CURVE 60 50 40 30 20 10 0 0 20 40 60 80 AMBIENT TEMPERATURE (DEG. C.) POWER DISSIPATION (WATTS) POWER DISSIPATION VS OUTPUT CURRENT 8 Low Line 7 6 5 Nominal Line 4 3 High Line 2 1 0 1 2 3 4 5 6 7 8 9 10 11 OUTPUT CURRENT (AMPS) EFFICIENCY VS OUTPUT CURRENT 100 Low Line EFFICIENCY (%) 90 80 70 Nominal Line 60 50 High Line 40 30 0 1 2 3 4 5 6 7 8 9 10 11 OUTPUT CURRENT (AMPS) (888) 597-WALL www.wallindustries.com 2 WALL INDUSTRIES, INC. APPLICATION NOTES LPQ SERIES TYPICAL OUTPUT RIPPLE 20mV/div, 1uS/div, full load, 36Vin 10uF // 0.1uF decoupling caps room temp TYPICAL OUTPUT RIPPLE 50mV/div, 1uS/div, full load 75Vin 10uF // 0.1uF decoupling cap room temp TYPICAL INPUT RIPPLE CURRENT 2mA/div, 1uS/div, full load 48Vin at room temp with a 12 uH / 33 uF input filter TYPICAL TRANSIENT RESPONSE 20mV/div, 200uS/div, 50% full load to 75% full load 48Vin room temp TYPICAL RISE TIME & TURN-ON DELAY USING LOGIC ENABLE 2V/div, 10mS/div (Vout), 1V/div 10mS/div (logic enable) 36Vin, full load at room temp TYPICAL RISE TIME & TURN-ON DELAY WITH Vin 0-48V 1V/div, 10mS/div (Vout), 10V/div, 10mS/div (Vin) at room temp (888) 597-WALL www.wallindustries.com 3