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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MMPF0200Z датащи(PDF) 39 Page - NXP Semiconductors |
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MMPF0200Z датащи(HTML) 39 Page - NXP Semiconductors |
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39 / 118 page  Analog Integrated Circuit Device Data Freescale Semiconductor 39 PF0200Z Functional Block Requirements and Behaviors Power Generation Programmable Maximum Current The maximum current, ISWxMAX, of each buck regulator is programmable. This allows the use of smaller inductors where lower currents are required. Programmability is accomplished by choosing the number of paralleled power stages in each regulator. The SWx_PWRSTG[2:0] bits on the Extended Page 2 of the register map control the number of power stages. See Table 37 for the programmable options. Bit[0] must always be enabled to ensure the stage with the current sensor is chosen. The default setting, SWx_PWRSTG[2:0] = 111, represents the highest maximum current. The current limit for each option is also scaled by the percentage of power stages that are enabled. Table 36. Regulator Frequency Configuration SWxFREQ[1:0] Frequency 00 1.0 MHz 01 2.0 MHz 10 4.0 MHz 11 Reserved Table 37. Programmable Current Configuration Regulators Control Bits % of Power Stages Enabled Rated Current (A) SW1AB SW1AB_PWRSTG[2:0] ISW1ABMAX 0 0 1 40% 1.0 0 1 1 80% 2.0 1 0 1 60% 1.5 1 1 1 100% 2.5 SW2 SW2_PWRSTG[2:0] ISW2MAX 0 0 1 38% 0.55 0 1 1 75% 1.125 1 0 1 63% 0.95 1 1 1 100% 1.5 SW3A SW3A_PWRSTG[2:0] ISW3AMAX 0 0 1 40% 0.5 0 1 1 80% 1.0 1 0 1 60% 0.75 1 1 1 100% 1.25 SW3B SW3B_PWRSTG[2:0] ISW3BMAX 0 0 1 40% 0.5 0 1 1 80% 1.0 1 0 1 60% 0.75 1 1 1 100% 1.25 |
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