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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SPSB100 датащи(PDF) 11 Page - STMicroelectronics |
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SPSB100 датащи(HTML) 11 Page - STMicroelectronics |
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11 / 214 page  • BUCK2 (5.0 V): charged with 1 A (DC activation) at 2.4 MHz • BUCK3 (0.98 V): charged with 2 A (DC activation) at 2.4 MHz Note: 1. BUCK3 load current is already considered in the power dissipation calculation, so 1 A is referred to BUCK1 external loads current. 2. Selecting the switching frequency at 2.4 MHz for BUCK1 and BUCK2 will lower the regulators efficiency and this extra power to be dissipated can generate a faster thermal shut-down. In case the application requires a high DC current load, it is strongly suggested using the switching frequency at 400 kHz for BUCK1 and BUCK2. The following curves show the relationship between max power dissipation vs ambient temperature: Figure 4. Max power dissipation vs ambient temperature for case "A" and case "B" 0.000 0.500 1.000 1.500 2.000 2.500 3.000 3.500 4.000 4.500 5.000 -50 -25 0 25 50 75 100 125 150 175 200 Tamb. [°C] Pwr_A [W] Pwr_B [W] SPSB100 Maximum ratings DS14640 - Rev 1 page 11/214 |
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