Auxiliary Switch Diode for Snubber SARS01/02/05/10 Data Sheet Description Package SARS is the auxiliary switch diode for snubber circuit, used in the primary side clamp snubber circuit of switched-mode power supplies with fly back topology. Since the ringing voltage at turning off the power MOSFET is more reduced by the clamp snubber circuit using SARS, the cross regulation of multi-outputs is improved. Since some energy of the ringing is transferred to the secondary side, the power supply efficiency can be improved. Features SARS01 (Axial φ 2.7 / φ 0.60) SARS02 (Axial φ 4 / φ 0.78) SARS05 (SMA 4.5×2.6) ● Improving cross regulation ● Reducing noise ● Improving efficiency SARS10 (TO220F-2L) Application Switched-mode power supply (SMPS) with flyback topology such as for the followings: ● White goods ● Adaptor ● Industrial equipment Not to Scale Lineup ● VRM=800V RS2 Typical Application Clamp snubber CS External component SARS IF (AVG) VF (max.) Power supply output power, PO* SARS01 1.2 A 0.92 V ~50W SARS02 1.5 A 0.92 V ~100W SARS05 1A 1.05 V ~50W SARS10 0.3 A 13 V ~300W RS1 Built-in 22Ω RS2 Products * PO is the reference value at selection. The temperature of SARS should be measured based on actual operation in the application. Cont. AC/DC converter IC SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 1 SARS01/02/05/10 CONTENTS Description ------------------------------------------------------------------------------------------------------ 1 CONTENTS ---------------------------------------------------------------------------------------------------- 2 1. Absolute Maximum Ratings ----------------------------------------------------------------------------- 3 2. Electrical Characteristics -------------------------------------------------------------------------------- 3 3. Performance Curves -------------------------------------------------------------------------------------- 4 3.1 SARS01 ------------------------------------------------------------------------------------------------ 4 3.1.1 Typical Characteristics ----------------------------------------------------------------------- 4 3.1.2 Power Dissipation Curves (Tj = 150°C) --------------------------------------------------- 4 3.1.3 Derating Curves (Tj = 150°C) --------------------------------------------------------------- 5 3.2 SARS02 ------------------------------------------------------------------------------------------------ 5 3.2.1 Typical Characteristics ----------------------------------------------------------------------- 5 3.2.2 Power Dissipation Curves (Tj = 150°C) --------------------------------------------------- 6 3.2.3 Derating Curves (Tj = 150°C) --------------------------------------------------------------- 6 3.3 SARS05 ------------------------------------------------------------------------------------------------ 7 3.3.1 Typical Characteristics ----------------------------------------------------------------------- 7 3.3.2 Power Dissipation Curves (Tj = 150°C) --------------------------------------------------- 7 3.3.3 Derating Curves (Tj = 150°C) --------------------------------------------------------------- 8 3.4 SARS10 ------------------------------------------------------------------------------------------------ 8 3.4.1 Typical Characteristics ----------------------------------------------------------------------- 8 3.4.2 Power Dissipation Curves (Tj = 125°C) --------------------------------------------------- 9 3.4.3 Derating Curves (Tj = 125°C) --------------------------------------------------------------- 9 4. External Dimensions and Marking Diagram ------------------------------------------------------ 10 4.1 SARS01 ---------------------------------------------------------------------------------------------- 10 4.2 SARS02 ---------------------------------------------------------------------------------------------- 10 4.3 SARS05 ---------------------------------------------------------------------------------------------- 11 4.4 SARS10 ---------------------------------------------------------------------------------------------- 11 5. Operating Comparison of Clamp Snubber Circuit ----------------------------------------------- 12 6. Power Dissipation and Junction Temperature Calculation ------------------------------------- 13 7. Parameter Setting of Snubber circuit using SARS ----------------------------------------------- 14 8. Reference Design of Power Supply ------------------------------------------------------------------ 15 OPERATING PRECAUTIONS -------------------------------------------------------------------------- 17 IMPORTANT NOTES ------------------------------------------------------------------------------------- 18 SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 2 SARS01/02/05/10 1. Absolute Maximum Ratings Unless specifically noted TA = 25 °C. SARS10 incorporates a resistance (22Ω). Parameter Symbol Conditions Rating Transient Peak Reverse Voltage VRSM 800 Peak Repetitive Reverse Voltage Average Forward Current* Surge Forward Current VRM 800 IF(AV) IFSM 10 ms, half sine wave, one shot 1 ms, square pulse, one shot I2t Limiting Value I2t Junction Temperature Tj Storage Temperature Tstg Power Dissipation 1 ms ≤ t ≤10 ms P Unit V Note V 1.2 1.2 1.0 0.3 110 100 30 A A 1.5 SARS01 SARS02 SARS05 SARS10 SARS01 SARS02 SARS05 SARS10 60.5 50 4.5 − −40 to 150 −20 to 125 −40 to 150 −20 to 125 3 .0 A2s °C °C W SARS01 SARS02 SARS05 SARS10 SARS01/02/05 SARS10 SARS01/02/05 SARS10 SARS10 * Refer to Section 3 Derating Curves 2. Electrical Characteristics Unless specifically noted, TA = 25 °C. SARS10 incorporates a resistance (22Ω). Parameter Symbol Conditions Min. Typ. IF = 1.2 A − − IF = 1.5 A Forward Voltage Drop VF IF = 1.0 A − − IF = 0.5 A − − − − − − Reverse Leakage Current IR VR = VRM − − − − VR = VRM, Tj = 100 °C − − Reverse Leakage Current H･IR Under High Temperature VR = VRM, Tj = 125 °C − − 2 − IF = IRP = 100 mA, 2 − Reverse Recovery Time trr Tj = 25 °C, 2 − 90 % recovery point 1 − − − (1) Rth(j-L) − − Thermal Resistance − − (2) Rth(j-C) − − (1) (2) Max. 0.92 0.92 1.05 13 10 10 5 10 50 100 18 18 19 9 20 15 20 15 Unit V µA µA µs °C/W °C/W Note SARS01 SARS02 SARS05 SARS10 SARS01 SARS02 SARS05 SARS10 SARS01/02/05 SARS10 SARS01 SARS02 SARS05 SARS10 SARS01 SARS02 SARS05 SARS10 Rth(j-L) is thermal resistance between junction and lead. Rth(j-c) is thermal resistance between junction and case. SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 3 SARS01/02/05/10 3. Performance Curves T is pulse cycle, t is pulse width. 3.1 SARS01 3.1.1 Typical Characteristics 100 1.0E-03 TA = 150°C 1.0E-04 10 Reverse Current, IR (A) Forward Current, IF (A) 1.0E-05 1 TA = 150°C 0.1 TA = 25°C TA = 100°C 0.01 1.0E-07 TA = 25°C 1.0E-09 0.0 0.5 1.0 Forward Voltage, VF (V) 1.5 0 Figure 3-1 VF－IF typical characteristics 200 400 600 Reverse Voltage, VR (V) 800 Figure 3-2 VR－IR typical characteristics Power Dissipation Curves (Tj = 150°C) 0.4 1.2 1.0 Reverse Power Dissipation, PR (W) Forward Power Dissipation, PF (W) 1.0E-06 1.0E-08 0.001 3.1.2 TA = 100°C 0.8 0.6 DC 0.4 0.2 0.3 0.2 0.1 Sine wave 0 0.0 0 0.2 0.4 0.6 0.8 1 1.2 0 Average Forward Current, IF(AV) (A) Figure 3-3 IF(AV)－PF SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 200 400 600 800 Reverse Voltage, VR (V) Figure 3-4 VR－PR 4 SARS01/02/05/10 3.1.3 Derating Curves (Tj = 150°C) 1.2 1.0 Average Forward Current, IF(AV) (A) Average Forward Current, IF(AV) (A) 1.2 DC 0.8 0.6 0.4 0.2 0.0 1.0 Sine wave 0.8 DC 0.6 0.4 0.2 0.0 100 110 120 130 140 150 100 110 Lead Temperature, TL (°C) 130 140 150 Lead Temperature, TL (°C) Figure 3-5 TL－IF(AV) (VR = 0 V) 3.2 120 Figure 3-6 TL－IF(AV) (VR = 800 V) SARS02 3.2.1 Typical Characteristics 100 1.0E-03 TA = 150°C 1.0E-04 1.0E-05 1 TA = 150°C Reverse Current, IR (A) Forward Current, IF (A) 10 TA = 25°C 0.1 TA = 100°C 0.01 0.001 1.0E-06 TA = 100°C 1.0E-07 TA = 25°C 1.0E-08 1.0E-09 0.0 0.5 1.0 Forward Voltage, VF (V) Figure 3-7 VF－IF typical characteristics 1.5 0 200 400 600 Reverse Voltage, VR(V) 800 Figure 3-8 VR－IR typical characteristics SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 5 SARS01/02/05/10 3.2.2 Power Dissipation Curves (Tj = 150°C) 0.5 1.2 Forward Power Dissipation, PR (W) Forward Power Dissipation, PF (W) 1.0 0.8 0.6 DC 0.4 0.2 0.0 0.4 0.3 0.2 0.1 Sine wave 0 0.0 0.2 0.4 0.6 0.8 1.0 1.2 0 Figure 3-9 IF(AV)－PF 600 800 Figure 3-10 VR－PR Derating Curves (Tj = 150°C) 1.2 1.2 1.0 1.0 DC 0.8 0.6 0.4 0.2 Average Forward Current, IF(AV) (A) Average Forward Current, IF(AV) (A) 400 Reverse Voltage, VR (V) Average Forward Current, IF(AV) (A) 3.2.3 200 Sine wave 0.8 DC 0.6 0.4 0.2 0.0 0.0 100 110 120 130 140 150 100 Lead Temperature, TL (°C) Figure 3-11 TL－IF(AV) (VR = 0 V) 110 120 130 140 150 Lead Temperature, TL (°C) Figure 3-12 TL－IF(AV) (VR = 800 V) SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 6 SARS01/02/05/10 3.3 SARS05 3.3.1 Typical Characteristics 100 1.0E-04 TA = 150°C 1.0E-05 10 1 TA = 25°C 0.1 TA = 100°C 0.01 0.001 1.0E-07 TA = 25°C 1.0E-08 1.0E-09 1.0E-10 0.0 0.5 1.0 Forward Voltage, VF (V) 1.5 0 Figure 3-13 VF－IF typical characteristics 3.3.2 TA = 100°C TA = 150°C Reverse Current, IR (A) Forward Current, IF (A) 1.0E-06 200 400 600 Reverse Voltage, VR(V) 800 Figure 3-14 VR－IR typical characteristics Power Dissipation Curves (Tj = 150°C) 0.4 1.4 Forward Power Dissipation, PR (W) Forward Power Dissipation, PF (W) 1.2 1.0 0.8 0.6 0.4 DC 0.2 0.3 0.2 0.1 Sine wave 0 0.0 0.0 0.2 0.4 0.6 0.8 1.0 0 Average Forward Current, IF(AV) (A) Figure 3-15 IF(AV)－PF SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 200 400 600 800 Reverse Voltage, VR (V) Figure 3-16 VR－PR 7 SARS01/02/05/10 Derating Curves (Tj = 150°C) 1.0 1.0 0.9 0.9 Average Forward Current, IF(AV) (A) Average Forward Current, IF(AV) (A) 3.3.3 0.8 0.7 DC 0.6 0.5 0.4 0.3 0.2 0.1 0.8 0.7 0.6 Sine wave 0.5 DC 0.4 0.3 0.2 0.1 0.0 0.0 100 110 120 130 140 100 150 110 Lead Temperature, TL ( °C) 140 150 Figure 3-18 TL－IF(AV) (VR = 800 V) SARS10 3.4.1 Typical Characteristics 1 1.0E-04 TA = 150°C Reverse Current, IR (A) 1.0E-05 Forward Current, IF (A) 130 Lead Temperature, TL (°C) Figure 3-17 TL－IF(AV) (VR = 0 V) 3.4 120 0.1 0.01 TA = 150°C 1.0E-06 TA = 100°C 1.0E-07 TA = 25°C 1.0E-08 1.0E-09 TA = 100°C TA = 25°C 0.001 0 5 10 15 Forward Voltage, VF (V) Figure 3-19 VF－IF typical characteristics 1.0E-10 20 0 200 400 600 Reverse Voltage, VR(V) 800 Figure 3-20 VR－IR typical characteristics SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 8 SARS01/02/05/10 3.4.2 Power Dissipation Curves (Tj = 125°C) 3.0 0.08 Forward Power Dissipation, PR (W) Forward Power Dissipation, PF (W) 0.07 2.0 DC 1.0 0.06 0.05 0.04 0.03 0.02 0.01 0 0.0 0.0 0.1 0.2 0.3 0 100 200 300 400 500 600 700 800 Average Forward Current, IF(AV) (A) Figure 3-21 IF(AV)－PF 3.4.3 Reverse Voltage, VR (V) Figure 3-22 VR－PR Derating Curves (Tj = 125°C) Average Forward Current, IF(AV) (A) 0.3 DC 0.2 0.1 0.0 50 60 70 80 90 100 110 120 130 Case Temperature, TC (°C) Figure 3-23 TC－IF(AV) (VR = 800 V) SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 9 SARS01/02/05/10 4. 4.1 External Dimensions and Marking Diagram SARS01 Axial φ 2.7 / φ 0.60 Polarity marking (Cathode band) Part Number AR S1 Lot Number Y is the last digit of year (0 to 9) M is the month (1 to 9, O, N or D) D is a period of days ・ : 1st to 10th ・・ : 11th to 20th ・・・ : 21st to 31st YM D NOTES: ● Dimension is in millimeters. ● Pb-free. Device composition compliant with the RoHS directive. 4.2 SARS02 Axial φ 4 / φ 0.78 Polarity marking (Cathode band) SARS2 SARS2 Part Number YMD YMD Lot Number Y is the last digit of year (0 to 9) M is the month (1 to 9, O, N or D) D is a period of days ・ : 1st to 10th ・・ : 11th to 20th ・・・ : 21st to 31st NOTES: ● Dimension is in millimeters. ● Pb-free. Device composition compliant with the RoHS directive. SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 10 SARS01/02/05/10 4.3 SARS05 SMA 4.5×2.6 YMDD Part Number（AS05） Lot Number Y is the last digit of year (0 to 9) M is the month (1 to 9, O, N or D) DD is the date (two digit of 01 to 31) Polarity marking (Cathode band) NOTES: ● Dimension is in millimeters. ● Pb-free. Device composition compliant with the RoHS directive. 4.4 SARS10 TO220F-2L SARS10 Part Number YMDD Lot Number Y is the last digit of year (0 to 9) M is the month (1 to 9, O, N or D) DD is the date (two digit of 01 to 31) 1 2 NOTES: ● Dimension is in millimeters. ● Pb-free. Device composition compliant with the RoHS directive. SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 11 SARS01/02/05/10 5. Operating Comparison Snubber Circuit of Clamp Figure 5-1 shows the general clamp snubber circuit. In the circuit, the surge voltage at tuning off a power MOSFET is charged to CS through "Surge absorb loop", and is consumed by RS1 through "Energy discharge loop". All the consumed energy becomes loss in RS1. In addition, the ringing of surge voltage results in poor cross regulation of multi-outputs. SARS. The surge voltage at tuning off a power MOSFET is charged to CS through "Surge absorb loop". Since the reverse recovery time, trr, of SARS is a relatively long period, the energy charged to CS is discharged to the reverse direction of "Surge absorb loop" until CS voltage is equal to the flyback voltage. Some discharged energy is transferred to secondary side. Thus, the power supply efficiency improves. In addition, the power supply using SARS reduces the ringing voltage. Thus, the cross regulation of multi-outputs can be improved. Energy discharge loop RS1 CS RS1 CS Energy discharge loop DFRD RS2 SARS ID Surge absorb loop ID Cont. VDS Cont. Surge absorb loop VDS AC/DC converter IC AC/DC converter IC Figure 5-1 General clamp snubber circuit Figure 5-4 Clamp snubber circuit using SARS RS1 : 570 kΩ CS : 1000 pF DFRD : EG01C VDS VDS ID Figure 5-2 Waveforms in general clamp snubber circuit ID ID RS1 RS2 CS SARS : 570 kΩ : 22 Ω : 1000 pF : SARS01 Figure 5-5 Waveforms in clamp snubber circuit using SARS VDS ID VDS Figure 5-3 Enlarged view of Figure 5-2 Figure 5-6 Enlarged view of Figure 5-5 Figure 5-4 shows the clamp snubber circuit using SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 12 SARS01/02/05/10 6. Power Dissipation and Temperature Calculation Junction Figure 6-1 shows typical application using SARS. Figure 6-2 shows the operating waveforms of SARS. The power dissipation of SARS is calculated as follows: 1) The waveforms of SARS Voltage, VSARS, and SARS current, ISARS, is measured in actual application operation. VSARS × ISARS is calculated by the math function of oscilloscope. (Since SARS10 incorporates a resistance, VSARS(10) is measured.) 2) The each average energy (P1, P2…Pk) is measured at period of each polarity of VSARS × ISARS (t1, t2,…tk) as shown in Figure 6-1 by the automatic measurement function of the oscilloscope. 3) The power dissipation of SARS, PSARS, is calucultaed by Equation (1). (1) where PSARS: Power dissipation of SARS T: Switching cycle of power MOSFET (s) Pk: Average energy of period tk (W) The measurement of VSARS is recommended to use a differential probe. Please conform to the oscilloscope manual about power dissipation measurement including the delay compensation of probe. t1 t2 t3 … tk P1 P2 P3 … Pk ISARS 0 VSARS 0 Energy 0 T Figure 6-2 SARS current In addition, by using the temperature of SARS in actual application operation, the estimated junction temperature of SARS is calculated by Equation (2) and Equation (3). It should be enough lower than Tj of the absolute maximum rating. ● SARS01/02/05 (2) where Tj(SARS) : Junction temperature of SARS TL: Lead temperature of SARS j-L: Thermal resistance between junction to lead ● SARS10 (3) RS1 CS RS2 VSARS(10) VSARS ISARS SARS where Tj(SARS) : Junction temperature of SARS TC: Case temperature of SARS j-C: Thermal resistance between junction to case Cont. AC/DC converter IC Figure 6-1 Typical application SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 13 SARS01/02/05/10 7. Parameter Setting of Snubber circuit using SARS The temperature of SARS and peripheral components should be measured in actual application operation. The reference values of snubber circuit using SARS are as follows: ● CS 680 pF to 0.01 μF. The voltage rating is selected according to the voltage subtraced the input voltage from the peak of VDS. ● RS1 RS1 is the bias resistance to turn off SARS, and is 100 kΩ to 1 MΩ. Since RS1 is applied a high voltage and is a high resistance, the following should be considered according to the requirement of the application: Select a resistor designed against electromigration, or Use a combination of resistors in series to reduce applied voltage to each of them. The power rating of resistor should be selected from the measurement of the effective current of RS1 based on actual operation in the application. ● RS2 RS2 is the limited resistance in the energy discharging. The value of 22 Ω to 220 Ω is connected to SARS in series (SARS10 incorporates RS2). The power rating of resistor should be selected from the measurement of the effective current of RS2 based on actual operation in the application. SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 14 SARS01/02/05/10 8. Reference Design of Power Supply As an example, the following show the power supply specification, the circuit schematic, the bill of materials, and the transformer specification. ● Power supply specification STR3A453D IC AC85V to AC265V Input voltage 34.8 W (40.4 W peak) Output power 8 V / 0.5 A Output 1 Output 2 14 V / 2.2 A (2.6 A peak) ● Circuit schematic 1 F1 L1 D1 D2 D51 T1 VOUT1 (+) C1 D4 3 D3 C3 R1 S1 C2 C51 C52 (-) R2 D52 P1 D5 OUT2 (+) U1 D/ST 5 R54 R51 FB/OLP S2 4 NC C53 6 D/ST GND D6 D/ST VCC D/ST S/OCP 7 PC1 R3 2 8 R55 3 R53 D C5 1 U51 STR3A400 C6 R4 R52 C54 R56 (-) C4 PC1 C7 ● Bill of materials Symbol C1 C2 C3 C4 C5 C6 C7 C51 C52 C53 C54 D1 D2 D3 D4 D5 D6 D51 (2) (2) (2) (2) (2) (2) Ratings(1) Film, 0.1 μF, 275 V Electrolytic, 150 μF, 400 V Ceramic, 1000 pF, 1 kV Ceramic, 0.01 μF Electrolytic, 22 μF, 50 V Ceramic, 15 pF / 2 kV Ceramic, 2200 pF, 250 V Electrolytic, 680 μF, 25 V Electrolytic, 680 μF, 25 V Electrolytic, 470 μF, 16 V Ceramic, 0.1 μF, 50 V 600 V, 1 A 600 V, 1 A 600 V, 1 A 600 V, 1 A 800 V, 1.2 A Fast recovery, 200 V, 1 A Schottky, 60 V, 1.5 A Recommended Sanken Parts EM01A EM01A EM01A EM01A SARS01 AL01Z EK16 Ratings(1) Symbol D52 F1 L1 PC1 R1 R2 R3 R4 R51 R52 R53 R54 R55 R56 T1 U1 U51 (2) (3) (2) (2) (2) Schottky, 100V, 10A Fuse, AC 250 V, 3 A CM inductor, 3.3 mH Photo-coupler, PC123 or equiv Metal oxide, 330 kΩ, 1 W 47 Ω, 1 W 10 Ω 0.47 Ω, 1/2 W 1 kΩ 1.5 kΩ 100 kΩ 6.8 kΩ ± 1 %, 39 kΩ ± 1 %, 10 kΩ Recommended Sanken Parts FMEN-210A See the specification IC, Shunt regulator, VREF = 2.5 V STR3A453D (TL431 or equiv) (1) Unless otherwise specified, the voltage rating of capacitor is 50 V or less and the power rating of resistor is 1/8 W or less. It is necessary to be adjusted based on actual operation in the application. (3) Resistors applied high DC voltage and of high resistance are recommended to select resistors designed against electromigration or use combinations of resistors in series to reduce applied voltage to each of them, according to the requirement of the application. (2) SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 15 SARS01/02/05/10 ● Transformer specification Primary inductance, LP : 518 μH Core size : EER-28 Al-value : 245 nH/N2 (Center gap of about 0.56 mm) Winding specification Winding Primary winding Primary winding Auxiliary winding Output 1 winding Output 1 winding Output 2 winding Output 2 winding Symbol P1 P2 D S1-1 S1-2 S2-1 S2-2 Number of turns (turns) 18 28 12 6 6 4 4 Wire diameter (mm) φ 0.23 × 2 φ 0.30 φ 0.30 × 2 φ 0.4 × 2 φ 0.4 × 2 φ 0.4 × 2 φ 0.4 × 2 Construction Single-layer, solenoid winding Single-layer, solenoid winding Solenoid winding Solenoid winding Solenoid winding Solenoid winding Solenoid winding 4mm 2mm VDC P2 8V D S2-1 S1-1 P2 P1 Pin side S2-2 S1-2 Margin tape Margin tape P1 S1-2 Drain 14V VCC D Bobbin Core S1-1 S2-1 S2-2 GND GND Cross-section view SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 ●: Start at this pin 16 SARS01/02/05/10 OPERATING PRECAUTIONS In the case that you use Sanken products or design your products by using Sanken products, the reliability largely depends on the degree of derating to be made to the rated values. Derating may be interpreted as a case that an operation range is set by derating the load from each rated value or surge voltage or noise is considered for derating in order to assure or improve the reliability. In general, derating factors include electric stresses such as electric voltage, electric current, electric power etc., environmental stresses such as ambient temperature, humidity etc. and thermal stress caused due to self-heating of semiconductor products. For these stresses, instantaneous values, maximum values and minimum values must be taken into consideration. In addition, it should be noted that since power devices or IC’s including power devices have large self-heating value, the degree of derating of junction temperature affects the reliability significantly. Because reliability can be affected adversely by improper storage environments and handling methods, please observe the following cautions. Cautions for Storage ● Ensure that storage conditions comply with the standard temperature (5 to 35°C) and the standard relative humidity (around 40 to 75%); avoid storage locations that experience extreme changes in temperature or humidity. ● Avoid locations where dust or harmful gases are present and avoid direct sunlight. ● Reinspect for rust on leads and solderability of the products that have been stored for a long time. Cautions for Testing and Handling When tests are carried out during inspection testing and other standard test periods, protect the products from power surges from the testing device, shorts between the product pins, and wrong connections. Ensure all test parameters are within the ratings specified by Sanken for the products. Remarks About Using Thermal Silicone Grease ● When thermal silicone grease is used, it shall be applied evenly and thinly. If more silicone grease than required is applied, it may produce excess stress. ● The thermal silicone grease that has been stored for a long period of time may cause cracks of the greases, and it cause low radiation performance. In addition, the old grease may cause cracks in the resin mold when screwing the products to a heatsink. ● Fully consider preventing foreign materials from entering into the thermal silicone grease. When foreign material is immixed, radiation performance may be degraded or an insulation failure may occur due to a damaged insulating plate. ● The thermal silicone greases that are recommended for the resin molded semiconductor should be used. Our recommended thermal silicone grease is the following, and equivalent of these. Type Suppliers G746 Shin-Etsu Chemical Co., Ltd. YG6260 Momentive Performance Materials Japan LLC SC102 Dow Corning Toray Co., Ltd. Cautions for Mounting to a Heatsink ● When the flatness around the screw hole is insufficient, such as when mounting the products to a heatsink that has an extruded (burred) screw hole, the products can be damaged, even with a lower than recommended screw torque. For mounting the products, the mounting surface flatness should be 0.05mm or less. ● Please select suitable screws for the product shape. Do not use a flat-head machine screw because of the stress to the products. Self-tapping screws are not recommended. When using self-tapping screws, the screw may enter the hole diagonally, not vertically, depending on the conditions of hole before threading or the work situation. That may stress the products and may cause failures. ● Recommended screw torque: Package TO-220, TO-220F TO-3P, TO-3PF, TO-247 SLA Recommended Screw Torque 0.490 to 0.686 N・m (5 to 7 kgf・cm) 0.686 to 0.882 N・m (7 to 9 kgf・cm) 0.588 to 0.784 N・m (6 to 8 kgf・cm) SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 17 SARS01/02/05/10 ● For tightening screws, if a tightening tool (such as a driver) hits the products, the package may crack, and internal stress fractures may occur, which shorten the lifetime of the electrical elements and can cause catastrophic failure. Tightening with an air driver makes a substantial impact. In addition, a screw torque higher than the set torque can be applied and the package may be damaged. Therefore, an electric driver is recommended. When the package is tightened at two or more places, first pre-tighten with a lower torque at all places, then tighten with the specified torque. When using a power driver, torque control is mandatory. ● Please pay special attention about the slack of the press mold. In case that the hole diameter of the heatsink is less than 4 mm, it may cause the resin crack at tightening. Soldering ● When soldering the products, please be sure to minimize the working time, within the following limits: 260 ± 5 °C 10 ± 1 s (Flow, 2 times) 380 ± 10 °C 3.5 ± 0.5 s (Soldering iron, 1 time) ● Soldering should be at a distance of at least 1.5 mm from the body of the products. IMPORTANT NOTES ● The contents in this document are subject to changes, for improvement and other purposes, without notice. Make sure that this is the latest revision of the document before use. ● Application examples, operation examples and recommended examples described in this document are quoted for the sole purpose of reference for the use of the products herein and Sanken can assume no responsibility for any infringement of industrial property rights, intellectual property rights, life, body, property or any other rights of Sanken or any third party which may result from its use. ● Unless otherwise agreed in writing by Sanken, Sanken makes no warranties of any kind, whether express or implied, as to the products, including product merchantability, and fitness for a particular purpose and special environment, and the information, including its accuracy, usefulness, and reliability, included in this document. ● Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semiconductor products at a certain rate is inevitable. Users of Sanken products are requested to take, at their own risk, preventative measures including safety design of the equipment or systems against any possible injury, death, fires or damages to the society due to device failure or malfunction. ● Sanken products listed in this document are designed and intended for the use as components in general purpose electronic equipment or apparatus (home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). When considering the use of Sanken products in the applications where higher reliability is required (transportation equipment and its control systems, traffic signal control systems or equipment, fire/crime alarm systems, various safety devices, etc.), and whenever long life expectancy is required even in general purpose electronic equipment or apparatus, please contact your nearest Sanken sales representative to discuss, prior to the use of the products herein. The use of Sanken products without the written consent of Sanken in the applications where extremely high reliability is required (aerospace equipment, nuclear power control systems, life support systems, etc.) is strictly prohibited. ● When using the products specified herein by either (i) combining other products or materials therewith or (ii) physically, chemically or otherwise processing or treating the products, please duly consider all possible risks that may result from all such uses in advance and proceed therewith at your own responsibility. ● Anti radioactive ray design is not considered for the products listed herein. ● Sanken assumes no responsibility for any troubles, such as dropping products caused during transportation out of Sanken’s distribution network. ● The contents in this document must not be transcribed or copied without Sanken’s written consent. SARS01/02/05/10 - DSJ Rev.1.0 SANKEN ELECTRIC CO.,LTD. Jun.29, 2015 http://www.sanken-ele.co.jp/en/ © SANKEN ELECTRIC CO.,LTD. 2015 18