поискавой системы для электроныых деталей |
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UC19432-SP датащи(PDF) 4 Page - Texas Instruments |
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UC19432-SP датащи(HTML) 4 Page - Texas Instruments |
4 / 8 page UC19432-SP SLUS951A – NOVEMBER 2009 – REVISED JULY 2010 www.ti.com SENSE The inverting terminal of the error amplifier used as both the voltage sense input to the error amplifier and its other compensation point. The error amplifier uses the SENSE input to compare against the 1.3-V on-chip reference. The SENSE pin is also used as the under-voltage lockout (UVLO). It is intended to keep the chip from operating until the internal reference is properly biased. The threshold is approximately 1 V. It is important that once the UVLO is released, the error amplifier can drive the transconductance amplifier to stabilize the loop. If a capacitor is connected between the SENSE and COMP pins to create a pole, it will limit the slew rate of the error amplifier. To increase the bandwidth and ensure startup a low load current, it is recommended to create a zero along with the pole as shown in he UC19431 shunt regulator application. The error amplifier must slew 2 V to drive the transconductance amplifier initially on. VCC The power connection for the device. The minimum to maximum operating voltage is 2.4 V to 24 V. The quiescent current is typically 0.5 mA. OVER-VOLTAGE COMPARATOR APPLICATION The signal VIN senses the input voltage. As long as the input voltage is less than 5.5 V, the output is equal to the voltage on VIN. During this region of operation, the diode is reversed biased which keeps the EA+ pin at 1.3 V. When VIN exceeds the over-voltage threshold of 5.5 V, the output is driven low. This forward biases the diode and creates hyseresis by changing the threshold to 4.5 V. Figure 1. 5.5-V Over-Voltage Comparator With Hysteresis 4 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): UC19432-SP |
Аналогичный номер детали - UC19432-SP |
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Аналогичное описание - UC19432-SP |
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