STSR2 STMicroelectronics, STSR2 Datasheet
STSR2
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STSR2 Summary of contents
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... STSR2 automatically turns off the outputs when duty-cycle is lower than 13%, while STSR2M works even at very low duty-cycle values. with GATE1 Vcc 2 + BIAS UVLO PEAK ...
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... CONNECTION DIAGRAM (top view) 2/12 Parameter =105°C without heatsink A Pins 1, Pin 3 Parameter SO-8 STSR2CD STSR2MCD Value Unit - 270 0.9 KV -55 to +150 °C -40 to +125 °C SO-8 Unit 40 °C/W 160 °C/W SO-8 (T&R) STSR2CD-TR STSR2MCD-TR ...
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... GATE2 Reference for power signals, this pin carries the full peak currents for the two outputs turning off ANT1 ) in turning off the OUT ANT1 >V the OUT will be high for a INHIBIT H GATE2 ). In typical forward converter application turning off ANT2 STSR2 . It GATE2 3/12 ...
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... 25° 200mV INHIBIT V = -200mV INHIBIT V = 200mVNo Load INHIBIT T = 25° 25°C for STSR2 25°C for STSR2 J STSR2M is measured between 90% and 10% on the initial voltage F =-200mV, T =-40 to 125°C, unless J Min. Typ. Max. Unit 3.8 4 3.5 3.6 5.5 5 ...
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... TIMING DIAGRAM APPLICATION INFORMATION: STSR2 IN FORWARD CONVERTER SECONDARY SIDE TRANSFORMER Vin PWM NOTES 1) Ceramic Capacitors C1 and C2 must be placed very close to the IC and R2 set the anticipation time by partitioning the and resistor divider meant to provide the correct CK voltage range limits the current flowing through diode D2 when Freewheeling drain voltage is high; ...
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... STSR2 EXAMPLE OF COMPONENTS SELECTION FOR A FORWARD CONVERTER Forward Specification: V =36-72V IN V =3.3V OUT n=Np/Ns=4.5 R and R are calculated assuring a minimum voltage of 2. pin. At 36V input, the voltage on the 3 4 secondary winding is 36/4.5=8V. Choosing --------------------------------------------------------------- - – 2.8 R =1k is chosen. At 72V input the current at CK pin is calculated as: ...
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... INHIBIT OPERATION OF OUT NOTE: V =+200mV INHIBIT GATE2 STSR2 7/12 ...
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... STSR2 TYPICAL PERFORMANCE CHARACTERISTICS (unless otherwise specified T Figure 1 : Zener Characteristics Figure 2 : Rise and Fall Time vs Load Capacitor Figure 3 : OUT vs Characteristics GATE1,2 8/12 = 25°C j Figure 4 : Sink-Source ON Resistance vs Temperature Figure 5 : Clock Threshold Voltage vs Temperature Figure 6 : INHIBIT Threshold Voltage vs Temperature ...
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... Figure 7 : Supply Current vs Load Capacitor (each output) Figure 8 : Supply Current vs Clock Frequency Figure Temperature ON(GATE2) Figure 10 : Duty Cycle Shut Down vs Temperature Figure 11 : Duty Cycle Turn ON After Shut Down vs Temperature Figure 12 : Clock Leakage Current vs Clock Voltage STSR2 9/12 ...
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... STSR2 DIM. MIN. A 1.35 A1 0.10 A2 1.10 B 0.33 C 0.19 D 4. 5.80 h 0.25 L 0.40 k ddd 10/12 SO-8 MECHANICAL DATA mm. TYP MAX. 1.75 0.25 1.65 0.51 0.25 5.00 4.00 1.27 6.20 0.50 1.27 ˚ (max.) 8 0.1 inch MIN. TYP. MAX. 0.053 0.069 0.04 0.010 0.043 0.065 0.013 0.020 0.007 0.010 0.189 0.197 0.150 0.157 0.050 0.228 0.244 0.010 0.020 0.016 0.050 0016023/C ...
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... Tape & Reel SO-8 MECHANICAL DATA mm. DIM. MIN 12 8.1 Bo 5.5 Ko 2.1 Po 3.9 P 7.9 TYP MAX. MIN. 330 13.2 0.504 0.795 2.362 22.4 8.5 0.319 5.9 0.216 2.3 0.082 4.1 0.153 8.1 0.311 STSR2 inch TYP. MAX. 12.992 0.519 0.882 0.335 0.232 0.090 0.161 0.319 11/12 ...
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... STSR2 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice ...