STPS40L15C Low drop OR-ing power Schottky diode Features A1 Very low forward voltage drop for less power dissipation and reduced heatsink size K Reverse voltage suited to OR-ing of 3 V, 5 V A2 and 12 V rails Avalanche capability specified K Description A2 A2 Dual center tap schottky rectifier packaged in K K A1 TO-220AB and TO-247, this device is especially A1 intended for use as OR-ing diode in fault tolerant TO-220AB TO-247 power supply equipments. STPS40L15CT STPS40L15CW Table 1. Device summary Symbol Value I 2x20 A F(AV) V 15 V RRM T 125 C j (max) V 0.33 V F (max) July 2011 Doc ID 4926 Rev 6 1/8 www.st.com 8Characteristics STPS40L15C 1 Characteristics Table 2. Absolute ratings (limiting values, per diode) Symbol Parameter Value Unit V Repetitive peak reverse voltage 15 V RRM I Forward current rms 30 A F(RMS) Total 40 T = 140 C case I Average forward current A F(AV) = 1 Per diode 20 Surge non repetitive forward I t = 10 m, Sinusoidal 310 A FSM p current I Peak repetitive reverse current t = 2 s, F= 1 kHz 2 A RRM p I Non repetitive peak reverse current t = 100 s 3 A RSM p P Repetitive peak avalanche power t = 1s, T = 25 C 13140 W ARM p j T Storage temperature range -65 to + 150 C stg (1) T Maximum operating junction temperature 125 C j dV/dt Critical rate of rise of reverse voltage 10000 V/s dPtot 1 --------------- -------------------------- 1. < condition to avoid thermal runaway for a diode on its own heatsink dTj Rth()j a Table 3. Thermal resistances Symbol Parameter Value Unit Per diode 1.6 R Junction to case C/W th(j-c) Total 0.85 RCoupling 0.1 C/W th (c) Table 4. Static electrical characteristics (Per diode) Symbol Parameter Tests conditions Min. Typ. Max. Unit T = 25 C 6 Reverse leakage j (1) I V = V mA R R RRM current T = 100 C 200 500 j T = 25 C I = 19 A 0.41 j F T = 25 C I = 40 A 0.52 j F (1) V Forward voltage drop V F T = 125 C I = 19 A 0.28 0.33 j F T = 125 C I = 40 A 0.42 0.50 j F 1. Pulse test : t = 380 s, < 2% p To evaluate the conduction losses use the following equation : 2 P = 0.18 x I + 0.008 I F(AV) F (RMS) 2/8 Doc ID 4926 Rev 6