STPS345C-Y Automotive power Schottky rectifier Features Very small conduction losses Negligible switching losses Extremely fast switching Low thermal resistance Avalanche rated AEC-Q qualified Description This device is a dual center tap Schottky rectifier suited for switch mode power supply and high frequency DC to DC converters. Packaged in D 2 PAK, this device is especially intended for use in low voltage, high frequency inverters, free wheeling and polarity protection applications. Table. Device summary I F(AV) 2 x 5 A V RRM 45 V T j (max) 75 C V F (max) A A2 K A2 A K D 2 PAK STPS345CGY.57 V May 2 Doc ID 7264 Rev /7 www.st.com 7
Characteristics STPS345C-Y Characteristics Table 2. Absolute ratings (limiting values, per diode) Symbol Parameter Value Unit V RRM Repetitive peak reverse voltage 45 V I F(RMS) Forward rms voltage 3 A I F(AV) Average forward current δ =.5 T C = 55 C Per diode Per device I FSM Surge non repetitive forward current t p = ms sinusoidal 22 A P ARM Repetitive peak avalanche power t p = µs T j = 25 C 6 W T stg Storage temperature range -65 to +75 C T j Maximum operating junction temperature () -4 to +75 C dv/dt Critical rate of rise reverse voltage V/µs dptot. --------------- < condition to avoid thermal runaway for a diode on its own heatsink dtj Rth ------------------------- ( j a) Table 3. Thermal resistance parameters Symbol Parameter Value Unit R th (j-c) Junction to case Per diode Total When the diodes and 2 are used simultaneously : ΔT j (diode ) = P(diode) x R th(j-c) (Per diode) + P(diode 2) x R th(c) Table 4. 3.6.85 A C/W R th (c) Coupling. C/W Static electrical characteristics (per diode) Symbol Parameter Tests conditions Min. Typ. Max. Unit I R () V F () Reverse leakage current Forward voltage drop T j = 25 C - - 2 µa V R = V RRM T j = 25 C - 4 ma T j = 25 C I F = 5 A -.5.57 T j = 25 C - -.84 V I F = 3 A T j = 25 C -.65.72. Pulse test: t p = 38 µs, δ < 2% To evaluate the conduction losses use the following equation: 2 P =.42 x I F(AV) +. I F (RMS) 2/7 Doc ID 7264 Rev
STPS345C-Y Characteristics Figure. 2 9 8 7 6 5 4 3 2 P F(AV) (W) Average forward power dissipation versus average forward current (per diode) δ =.5 δ =. δ =.2 δ =.5 I F(AV) (A) δ=tp/t δ = 2 4 6 8 2 4 6 8 2 T tp Figure 2. 8 6 4 2 8 6 4 2 I F(AV) (A) δ=tp/t T Average forward current versus ambient temperature (δ =.5, per diode) tp R th(j-a) =5 C/W T amb( C) 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 P ARM(T) j P ARM(25 C)..8.6..4... t p(µs).2 T ( C) j 25 5 75 25 5 Figure 5. 2 8 6 I (A) M Non repetitive surge peak forward current versus overload duration (maximum values, per diode) Figure 6...9.8 Z th(j-c) /Rth(j-c) Relative variation of thermal impedance junction to ambient versus pulse duration 4 2.7.6 δ =.5 8 6 4 2 IM t δ=.5 t(s) T C=75 C T C= C T C=25 C.E-3.E-2.E-.E+.5.4.3.2.. δ =.2 δ =. Single pulse t (s) p δ=tp/t.e-3.e-2.e-.e+ T tp Doc ID 7264 Rev 3/7
Characteristics STPS345C-Y Figure 7. Reverse leakage current versus reverse voltage applied (typical values, per diode) Figure 8. Junction capacitance versus reverse voltage applied (typical values, per diode).e+5.e+4 I (µa) R T j=5 C T j=25 C C(nF) F=MHz V OSC=3mVRMS T j=25 C.E+3 T j= C T j=75 C.E+2 T j=5 C.E+ T j=25 C.E+.E- V (V) R 5 5 2 25 3 35 4 45 V (V) R Figure 9. I FM(A) Forward voltage drop versus forward current (maximum values, per diode) T j=25 C (typical values) T j=25 C (maximum values) T j=25 C (maximum values) Figure. 8 7 6 5 4 3 2 R th(j-a) ( C/W) Thermal resistance junction to ambient versus copper surface under tab Epoxy printed circuit board, copper thickness = 35 µm V FM..2.4.6.8..2.4.6.8 (V) S(cm²) 5 5 2 25 3 35 4 4/7 Doc ID 7264 Rev
STPS345C-Y Package information 2 Package information Epoxy meets UL94,V Lead-free package In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark. Table 5. Package dimensions D 2 PAK Dimensions Ref. Millimeters Inches Min. Max. Min. Max. L2 E C2 A A 4.4 4.6.73.8 A 2.49 2.69.98.6 A2.3.23..9 L D B.7.93.27.37 B2.4.7.45.67 L3 B2 B A C R C.45.6.7.24 C2.23.36.48.54 D 8.95 9.35.352.368 G E..4.393.49 A2 G 4.88 5.28.92.28 L 5. 5.85.59.624 M * V2 L2.27.4.5.55 * FLAT ZONE NO LESS THAN 2mm L3.4.75.55.69 M 2.4 3.2.94.26 R.4 typ..6 typ. V2 8 8 Figure. Footprint dimensions (in millimeters) 6.9.3 5.8.3 8.9 3.7 Doc ID 7264 Rev 5/7
Ordering information STPS345C-Y 3 Ordering information Table 6. Ordering information Order code Marking Package Weight Base qty Delivery mode STPS345CGY-TR STPS345CGY D 2 PAK.48 g Tape and reel 4 Revision history Table 7. Document revision history Date Revision Changes 24-May-2 Initial release. 6/7 Doc ID 7264 Rev
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