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STCS2_0807 Fiches technique(PDF) 11 Page - STMicroelectronics |
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STCS2_0807 Fiches technique(HTML) 11 Page - STMicroelectronics |
11 / 16 page STCS2 Application information 11/16 basing on this and on the thermal resistance and ambient temperature, the junction temperature can be calculated as: TJ = RthJA x PD + TA A typical application could be: – Input Voltage: 12 V; – 3 white LEDs with an typical VF = 3.6 V; – LEDs current: 1000 mA; – Package: Power SO-10; –TA = 50 °C; In this case the drain voltage is given by: VDRAIN = 12 - 3 x 3.6 = 1.2 V end the power dissipated in the IC is the following: PD = (1.2 - 0.1) x 1 + 12 x 0.5 x 10 -3 = 1.1 W With a thermal resistance junction-ambient equal to 12 °C/W the junction temperature is: TJ = 12 x 1.1 + 50 = 63 °C. The following pictures show the maximum power dissipation according to the ambient temperature: Figure 12. Maximum power dissipation vs TA for PowerSO-10 0.00 2.00 4.00 6.00 8.00 10.00 12.00 25 35 45 55 65 75 85 95 105 115 125 [°C] 12 35 R thJA [°C/W] P DMAX = (TJMAX-TA)/RthJA 0.00 2.00 4.00 6.00 8.00 10.00 12.00 25 35 45 55 65 75 85 95 105 115 125 [°C] 12 35 R thJA [°C/W] P DMAX = (TJMAX-TA)/RthJA |
Numéro de pièce similaire - STCS2_0807 |
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Description similaire - STCS2_0807 |
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