STPS2SC V, 2 A power Schottky rectifier Features High junction temperature capability for converters located in confined enrironment Low leakage current at high temperature Low static and dynamic losses as a result of the Schottky barrier Avalanche specification Description Schottky barrier rectifier designed for high frequency miniature switched mode power supplies such as adaptators and on board dc/dc converters. The device is packaged in TO-22AB, I 2 PA and TO-22FPAB. A A2 A2 A TO-22AB STPS2SCT I 2 PA STPS2SCR TO-22FPAB STPS2SCFP A2 A A2 A Table. Symbol Device summary Value I F(AV) 2 x A V RRM V T j 75 C V F (max).7 V February 2 Doc ID 28 Rev 2 /9 www.st.com 9
Characteristics STPS2SC Characteristics Table 2. Absolute ratings (limiting values, per diode) Symbol Parameter Value Unit V RRM Repetitive peak reverse voltage V I F(RMS) Forward rms current 3 A I F(AV) Average forward current δ =.5 TO-22AB / I 2 PA T c = 5 C TO-22FPAB T c = 4 C When the diodes and 2 are used simultaneously: Δ T j(diode ) = P (diode ) x R th(j-c)(per diode) + P (diode 2) x R th(c) Per diode Per device Per diode Per device I FSM Surge non repetitive forward current t p = ms sinusoidal 8 A P ARM Repetitive peak avalanche power t p = µs T j = 25 C 72 W T stg Storage temperature range -65 to + 75 C T j Maximum operating junction temperature () 75 C dv/dt Critical rate of rise of reverse voltage V/µs. dptot < dtj Rth(j-a) condition to avoid thermal runaway for a diode on its own heatsink Table 3. Thermal resistance Symbol Parameter Value Unit R th(j-c) Per diode 2.2 Junction to case TO-22AB / I 2 PA Total.3 C/W R th(c) Coupling.3 R th(j-c) Per diode 4.5 Junction to case TO-22FPAB Total 3.5 C/W R th(c) Coupling 2.5 Table 4. Static electrical characteristics (per diode) Symbol Parameter Tests conditions Min. Typ. Max. Unit I R () V F (2) Reverse leakage current Forward voltage drop. Pulse test: t p = 5 ms, δ < 2% 2. Pulse test: t p = 38 µs, δ < 2% To evaluate the conduction losses use the following equation: P =.62 x I F(AV) +.9 I F 2 (RMS) 2 2 T j = 25 C 3.5 µa V R = V RRM T j = 25 C.3 4.5 ma T j = 25 C.73 I F = 5 A T j = 25 C.57.6 T j = 25 C.85 I F = A T j = 25 C.66.7 T j = 25 C.94 I F = 2 A T j = 25 C.74.8 A V 2/9 Doc ID 28 Rev 2
STPS2SC Characteristics Figure. Average forward power dissipation versus average forward current (per diode) Figure 2. Average forward current versus ambient temperature (δ =.5, per diode) 9 8 7 6 5 4 3 2 P F(AV) (W) δ =. δ =.2 δ =.5 δ =.5 δ = T I F(AV) (A) δ=tp/t tp 2 3 4 5 6 7 8 9 2 3 9 8 7 6 5 4 3 2 I F(AV) (A) δ=tp/t T tp R th(j-a) =5 C/W R th(j-a) =Rth(j-c) T amb( C) TO-22FPAB I²PA/TO-22AB 25 5 75 25 5 75 Figure 3. Normalized avalanche power derating versus pulse duration Figure 4. Normalized avalanche power derating versus junction temperature P ARM(t p) P ARM(µs).2 PARM(Tj) PARM(25 C)..8.6.... t p(µs).4.2 T( C) j 25 5 75 25 5 Figure 5. 8 6 4 2 8 6 4 2 I (A) M IM t δ=.5 Non repetitive surge peak forward current versus overload duration (maximum values, per diode) t(s) T a=25 C T a=75 C T a=25 C.E-3.E-2.E-.E+ Figure 6. 2 9 8 7 6 5 4 3 2 I (A) M IM t δ=.5 Non repetitive surge peak forward current versus overload duration (maximum values, per diode) t(s) TO-22FPAB T a=25 C T a=75 C T a=25 C.E-3.E-2.E-.E+ Doc ID 28 Rev 2 3/9
Characteristics STPS2SC Figure 7...9.8.7.6 Z th(j-c) /Rth(j-c) δ =.5 Relative variation of thermal impedance junction to case versus pulse duration (per diode) Figure 8...9.8.7.6 Z th(j-c) /Rth(j-c) Relative variation of thermal impedance junction to case versus pulse duration (per diode) (TO-22FPAB) TO-22FPAB.5.5 δ =.5.4 δ =.2.4.3.2.. δ =. Single pulse t (s) p δ=tp/t.e-3.e-2.e-.e+ T tp.3.2.. δ =.2 δ =. Single pulse t (s) p δ=tp/t.e-3.e-2.e-.e+.e+ T tp Figure 9. Reverse leakage current versus reverse voltage applied (typical values, per diode) Figure. Junction capacitance versus reverse voltage applied (typical values, per diode).e+ I (ma) R C(pF).E+ T j=5 C F=MHz V OSC=3mVRMS T j=25 C T j=25 C.E- T j= C.E-2 T j=75 C T j=5 C.E-3.E-4 V (V) R T j=25 C 2 3 4 5 6 7 8 9 V (V) R Figure. Forward voltage drop versus forward current (per diode) I FM(A) T j=25 C (maximum values) T j=25 C (typical values) T j=25 C (maximum values) V FM(V)..2.4.6.8..2.4 4/9 Doc ID 28 Rev 2
STPS2SC Package information 2 Package information Epoxy meets UL94, V Cooling method: by conduction (C) Recommended torque value:.4 to.6 N m In order to meet environmental requirements, ST offers these devices in different grades of ECOPAC packages, depending on their level of environmental compliance. ECOPAC specifications, grade definitions and product status are available at: www.st.com. ECOPAC is an ST trademark. Table 5. TO-22FPAB dimensions Ref. Millimeters Dimensions Inches H A B Min. Max. Min. Max. A 4.4 4.6.73.8 B 2.5 2.7.98.6 D 2.5 2.75.98.8 E.45.7.8.27 Dia F.75.3.39 L6 F.5.7.45.67 L2 L7 F2.5.7.45.67 L3 G 4.95 5.2.95.25 L4 F F2 L5 D G 2.4 2.7.94.6 H.4.393.49 L2 6 Typ..63 Typ. G F E L3 28.6 3.6.26.25 L4 9.8.6.386.47 G L5 2.9 3.6.4.42 L6 5.9 6.4.626.646 L7 9. 9.3.354.366 Dia. 3. 3.2.8.26 Doc ID 28 Rev 2 5/9
Package information STPS2SC Table 6. I 2 PA dimensions Dimensions Ref. Millimeters Inches Min. Max. Min. Max. A A 4.4 4.6.73.8 E c2 A 2.4 2.72.94.7 L2 b.6.88.24.35 b.4.7.44.67 D c.49.7.9.28 c2.23.32.48.52 L A D 8.95 9.35.352.368 L b e 2.4 2.7.94.6 e 4.95 5.5.95.23 E.4.394.49 e e b c L 3 4.52.55 L 3.5 3.93.38.55 L2.27.4.5.55 6/9 Doc ID 28 Rev 2
STPS2SC Package information Table 7. TO-22AB dimensions Dimensions Ref. Millimeters Inches Min. Max. Min. Max. A 4.4 4.6.73.8 H2 Dia L5 A C L7 C.23.32.48.5 D 2.4 2.72.94.7 E.49.7.9.27 F.6.88.24.34 L2 F2 L6 F.4.7.44.66 F2.4.7.44.66 G 4.95 5.5.94.22 F L9 D G 2.4 2.7.94.6 F L4 H2.4.393.49 L2 6.4 typ..645 typ. G G M E L4 3 4.5.55 L5 2.65 2.95.4.6 L6 5.25 5.75.6.62 L7 6.2 6.6.244.259 L9 3.5 3.93.37.54 M 2.6 typ..2 typ. Diam. 3.75 3.85.47.5 Doc ID 28 Rev 2 7/9
Ordering information STPS2SC 3 Ordering information Table 8. Ordering information Order code Marking Package Weight Base qty Delivery mode STPS2SCT STPS2SCT TO-22AB 2.2 g 5 Tube STPS2SCFP STPS2SCFP TO-22FPAB 2 g 5 Tube STPS2SCR STPS2SCR I 2 PA.49 g 5 Tube 4 Revision history Table 9. Document revision history Date Revision Changes 6-Mar-25 First issue. 3-Feb-2 2 Added cathode indicator to illustration of TO-22AB on cover page. Changed parameter in Table 2 from RMS forward voltage to Forward rms current. 8/9 Doc ID 28 Rev 2
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