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TS12001ITD1022T bảng dữ liệu(PDF) 7 Page - Silicon Laboratories |
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TS12001ITD1022T bảng dữ liệu(HTML) 7 Page - Silicon Laboratories |
7 / 11 page TS12001 TS12001 Rev. 1.0 Page 7 BLOCK DIAGRAM THEORY OF OPERATION The TS12001 combines a 0.58V ±4.5% reference and an analog comparator with a resettable comparator latch in a single package. The TS12001 operates from a single 0.65V to 2.5V power supply and consumes less than 1µA total supply current. The TS12001 comparator has a push-pull and open- drain output driver. The push-pull output driver is powered from a separate supply voltage, OVDD. The open-drain output stage allows for easy output voltage level translation as may be required when driving systems powered with a different power supply rail. The analog comparator exhibits ±10mV of internal hysteresis for clean, chatter-free output switching. The internal reference was designed to sink or source up to 0.1µA load currents. The TS12001 has a preset UVLO threshold voltage of 0.78V (typ) or can be set to other threshold voltages with two external resistors where the divided voltage is applied to the SET pin. When the SET pin voltage is grounded or it is less than approximately 90mV, the internal preset UVLO threshold circuit will control the comparator outputs. If the SET pin is above approximately 90mV, the external voltage divider circuit will control the comparator outputs. The 0.58V reference voltage is tied to the inverting input of the comparator and the output of a switch is connected to the non-inverting input of the comparator. The output of the switch is either the SET voltage or the internal UVLO threshold voltage, depending on whether the SET pin voltage is above or below approximately 90mV. If the switch output is above 0.58V, the push-pull output (COUTPP) will be HIGH and the open-drain output (COUTOD) will be LOW and vice versa. For proper operation, the supply voltage VIN must be applied before the output driver supply voltage (OVDD) is applied. The TS12001 has a latch enable pin (LHDET) that |
Số phần tương tự - TS12001ITD1022T |
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Mô tả tương tự - TS12001ITD1022T |
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