Datenblatt-Suchmaschine für elektronische Bauteile |
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LM2830-Q1 Datenblatt(PDF) 10 Page - Texas Instruments |
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LM2830-Q1 Datenblatt(HTML) 10 Page - Texas Instruments |
10 / 37 page cv S R R Q GND FB SW VIN EN + - DRIVER Artificial Ramp SHDN Thermal SHDN OVP 1.6 MHz Comp Internal - SENSE I LIMIT I LDO Internal - START SOFT - PFET SENSE I ENABLE and UVLO 15 . 1 x REF V Control Logic VREF = 0.6V LM2830, LM2830-Q1 SNVS454E – AUGUST 2006 – REVISED DECEMBER 2014 www.ti.com 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Soft-Start This function forces VOUT to increase at a controlled rate during start up. During soft-start, the error reference voltage of the amplifier ramps from 0 V to its nominal value of 0.6 V in approximately 600 µs. This forces the regulator output to ramp up in a controlled fashion, which helps reduce inrush current. 7.3.2 Output Overvoltage Protection The overvoltage comparator compares the FB pin voltage to a voltage that is 15% higher than the internal reference VREF. Once the FB pin voltage goes 15% above the internal reference, the internal PMOS control switch is turned off, which allows the output voltage to decrease toward regulation. 7.3.3 Undervoltage Lockout Undervoltage lockout (UVLO) prevents the LM2830 device from operating until the input voltage exceeds 2.73 V (typical). The UVLO threshold has approximately 430 mV of hysteresis, so the part will operate until VIN drops below 2.3V (typical). Hysteresis prevents the part from turning off during power up if VIN is nonmonotonic. 10 Submit Documentation Feedback Copyright © 2006–2014, Texas Instruments Incorporated Product Folder Links: LM2830 LM2830-Q1 |
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Ähnliche Beschreibung - LM2830-Q1 |
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