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UC329002 датащи(PDF) 9 Page - Texas Instruments |
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UC329002 датащи(HTML) 9 Page - Texas Instruments |
9 / 28 page UCC29002 UCC29002/1 UCC39002 SLUS495H − SEPTEMBER 2001 − REVISED AUGUST 2007 9 www.ti.com FUNCTIONAL DESCRIPTION enable function (CS+, CS−) The two inputs of the current sense amplifier are also used for implementing an ENABLE function. During normal operation CS− = CS+ and the internal offset added between the CS− voltage and the inverting input of the enable comparator ensures that the UCC39002 is always enabled. By forcing the CS− pin approximately 0.5-V above the CS+ pin, the UCC39002 can be forced into a disable mode. While disabled, the UCC39002 disconnects itself from the load share bus and its adjust current is zero. UDG−02087 1 CS− 2 CS+ + ENABLE 0.5 V Figure 1. Enable Comparator fault protection Accidentally, the load share bus might be shorted to ground or to the positive bias voltage of the UCC39002. These events might result in erroneous output voltage adjustment. For that reason, the load share bus is continuously monitored by a window comparator as shown in Figure 2. UDG−02088 8 CSO 7 LS + + FAULT R 2R VDD − 0.7 V Figure 2. Fault Protection Comparators The FAULT signal is handled by the start up and adjust logic which pulls the non-inverting input of the adjust amplifier low when the FAULT signal is asserted. |
Аналогичный номер детали - UC329002 |
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Аналогичное описание - UC329002 |
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