Datenblatt-Suchmaschine für elektronische Bauteile |
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TPIC43T02 Datenblatt(PDF) 11 Page - Texas Instruments |
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TPIC43T02 Datenblatt(HTML) 11 Page - Texas Instruments |
11 / 27 page TPIC43T01, TPIC43T02 THREE-PHASE BRUSHLESS MOTOR RPM CONTROLLERS SLIS098 – APRIL 2000 11 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PRINCIPLES OF OPERATION Table 1. FG Reference Frequency EEPROM EEPROM FSEL PRE-DIVIDER TOTAL f(osc) FG f(ref) @f(osc) ADDR 1, BIT 1 ADDR 1, BIT 0 INPUT DIVIDE BY (osc) DIVIDE-BY 1 MHZ 5 MHZ 10 MHZ 0 0 1 3 3072 326 1628 3256 0 0 0 6 6144 163 814 1628 0 1 1 4 4096 244 1221 2441 0 1 0 8 8192 122 610 1221 1 0 1 6 6144 163 814 1628 1 0 0 12 12,288 81 407 814 1 1 1 8 8192† 122 610 1221 1 1 0 16 16,384† 61 305 610 † Equals default value sampling frequency for the digital filter, f(s), oscillator An external resistor (RT) and capacitor (CT) must be connected from the respective RT and CT terminals to GND to set the sampling frequency for the digital filter. Charge/discharge current at terminal CT will nominally be ±2 × (1V/RT). Nominal period is determined by the formula: T(CT) = 2 × RT × CT (see Figure 5). _ + _ + VDD I(RT) 2I(RT) IRT RT RT V(RT) = 1 V CT CT _ + 1.5 3.5 R S Q Clock To Digital Filter 4I(RT) 4:1 1:2 1:1 VDD 1 V Internal Reference I(RT) Figure 5. Digital Filter Sampling Clock Generation |
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