NSI45025ZT1G Constant Current Regulator & LED Driver 45 V, 25 mA 15%, 1.4 W Package The linear constant current regulator (CCR) is a simple, economical and robust device designed to provide a costeffective solution for NSI45025ZT1G ELECTRICAL CHARACTERISTICS (T = 25C unless otherwise noted) A Characteristic Symbol Min Typ Max Unit Steady State Current Vak = 7.5 V (Note 1) I 21.25 25 28.75 mA reg(SS) Voltage Overhead (Note 2) V 1.8 V overhead Pulse Current Vak = 7.5 V (Note 3) I 22 26 30 mA reg(P) Capacitance Vak = 7.5 V (Note 4) C 2.6 pF Capacitance Vak = 0 V (Note 4) C 6.9 pF 2 1. I steady state is the voltage (Vak) applied for a time duration 10 sec, using FR4 300 mm 2 oz. Copper traces, in still air. reg(SS) 2. V = V V . V is typical value for 75% I . overhead in LEDs overhead reg(SS) 3. I nonrepetitive pulse test. Pulse width t 300 sec. reg(P) 4. f = 1 MHz, 0.02 V RMS. THERMAL CHARACTERISTICS Characteristic Symbol Max Unit Total Device Dissipation (Note 5) T = 25C P 954 mW A D Derate above 25C 7.6 mW/C Thermal Resistance, JunctiontoAmbient (Note 5) R 131 C/W JA Thermal Reference, JunctiontoLead 4 (Note 5) 40.8 C/W R JL4 Total Device Dissipation (Note 6) T = 25C P 1074 mW A D Derate above 25C 8.6 mW/C Thermal Resistance, JunctiontoAmbient (Note 6) R 116 C/W JA Thermal Reference, JunctiontoLead 4 (Note 6) 39.9 C/W R JL4 Total Device Dissipation (Note 7) T = 25C P 1150 mW A D Derate above 25C 9.2 mW/C Thermal Resistance, JunctiontoAmbient (Note 7) 109 C/W R JA Thermal Reference, JunctiontoLead 4 (Note 7) 42 C/W R JL4 Total Device Dissipation (Note 8) T = 25C P 1300 mW A D Derate above 25C 10.4 mW/C Thermal Resistance, JunctiontoAmbient (Note 8) R 96 C/W JA Thermal Reference, JunctiontoLead 4 (Note 8) 39.4 C/W R JL4 Total Device Dissipation (Note 9) T = 25C P 1214 mW A D Derate above 25C 9.7 mW/C Thermal Resistance, JunctiontoAmbient (Note 9) R 103 C/W JA Thermal Reference, JunctiontoLead 4 (Note 9) 40.2 C/W R JL4 Total Device Dissipation (Note 10) T = 25C P 1389 mW A D Derate above 25C 11.1 mW/C Thermal Resistance, JunctiontoAmbient (Note 10) R 90 C/W JA Thermal Reference, JunctiontoLead 4 (Note 10) 37.7 C/W R JL4 Junction and Storage Temperature Range T , T 55 to +150 C J stg 2 5. FR4 100 mm , 1 oz. copper traces, still air. 2 6. FR4 100 mm , 2 oz. copper traces, still air. 2 7. FR4 300 mm , 1 oz. copper traces, still air. 2 8. FR4 300 mm , 2 oz. copper traces, still air. 2 9. FR4 500 mm , 1 oz. copper traces, still air. 2 10.FR4 500 mm , 2 oz. copper traces, still air. NOTE: Lead measurements are made by non contact methods such as IR with treated surface to increase emissivity to 0.9. Lead temperature measurement by attaching a T/C may yield values as high as 30% higher C/W values based upon empirical measurements and method of attachment.