поискавой системы для электроныых деталей |
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SD1579 датащи(PDF) 6 Page - Silan Microelectronics Joint-stock |
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SD1579 датащи(HTML) 6 Page - Silan Microelectronics Joint-stock |
6 / 7 page HANGZHOU SILAN MICROELECTRONICS CO.,LTD REV:1.0 2009.11.11 Http://www.silan.com.cn Page 6 of 7 APPLICATION INFORMATION 1. Back electromotive force causes regenerated current to VDD line, therefore take a measure such as placing a capacitor between power supply and GND for routing regenerated current; In order to reduce the output DO and DOB side effects of induced electromotive force, need to increase a resistance-capacitance network at the output; in a typical application circuit diagram, R1 and R2 is typically 56 ohms; C1, C2 and C3 is typically 2.2uF; The value of R and C must match the actual coil; 2. Figure 2 is the normal working state, the current compose ICC and Iload , power dissipation PC = VDD * ICC + Vo * Iload , Where Vo is the output voltage when DO or DOB turn on; It is need to be careful not to exceed its maximum power dissipation value dule to change of power supply voltage VDD and the coil current Iload. 3. SD1579 has built-in reverse protection diodes, so D1 is no need; If you increase the D1 can better protect the chips, as shown in Figure 3; it should be noted that care should to taken to the two coils current when power voltage reversed, if 2*Vo * Iload > IC's power consumption, it may cause damage to IC; Fig.2 Normal working state Fig.3 Reverse voltage state 4. Add a diode to coils can better protect the chip and the fans at reverse voltage state, as shown in Figure 4; Figure 4 Add a diode to coils |
Аналогичный номер детали - SD1579 |
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Аналогичное описание - SD1579 |
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