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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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IP1201 датащи(PDF) 15 Page - International Rectifier |
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IP1201 датащи(HTML) 15 Page - International Rectifier |
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15 / 29 page  www.irf.com 15 iP1201 Fig. 16: iP1201 Dual Output Simplified Schematic Overvoltage can be sensed by either connecting FB1s and FB2s to their corresponding outputs through separate output voltage divider resistor networks, or they can be connected directly to their corrsponding feedback pins FB1 and FB2. For Type III control loop compensation, FB1s and FB2s should be connected through separate voltage di- viders only. PGOOD This is an output voltage status signal that is open collector and is pulled low when the output voltage falls below 85% of the outout voltage. High state indicates that outputs are in regulation. There is only one PGOOD for both outputs. The PGOOD pin can be left floating if not used. Thermal Shutdown The iP1201 provides thermal shutdown. The thresh- old typically is set to 140°C. When the trip threshold is exceeded, thermal shutdown turns the outputs off. Thermal shutdown is not latched and automatic restart is initiated when the sensed temperature drops to the normal range. VIN SS1 VP-REF FB1S FB1 VSW1 HICCUP CC1 PGOOD SS2 VREF ENABLE RT SYNC VSW2 FB2 FB2S CC2 iP1201 VIN SS1 VP-REF FB1S FB1 VSW1 HICCUP CC1 PGOOD SS2 VREF ENABLE RT SYNC VSW2 FB2 FB2S CC2 C8 0.1uF L1 1.0uH Cout1 470uF R9 887 R7 1k C9 0.01uF R5 4.75k L2 1.0uH C11 6800pF R6 7.15k C7 0.1uF R3 30.9k C10 100pF R1 100k R2 100k 0.8V VOUT1 1.5V C18 1uF Cin 100uF R24 100k PGND VIN R10 2.15k R8 1k Cout2 470uF VOUT2 2.5V x4 x2 x2 |
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