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TPS630241YFFT Datasheet(PDF) 11 Page - Texas Instruments

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No. de Pieza. TPS630241YFFT
Descripción  High Current, High Efficiency Single Inductor Buck-Boost Converter
Descarga  29 Pages
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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TPS630241YFFT Datasheet(HTML) 11 Page - Texas Instruments

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TPS63024
TPS630241, TPS630242
www.ti.com
SLVSCK8A – NOVEMBER 2014 – REVISED DECEMBER 2014
Feature Description (continued)
9.3.4
Softstart
To minimize inrush current and output voltage overshoot during start up, the device has a Softstart. At turn on,
the input current raises monotonically until the output voltage reaches regulation. During Softstart, the input
current follows the current ramp charging the internal Softstart capacitor. The device smoothly ramps up the input
current bringing the output voltage to its regulated value even if a large capacitor is connected at the output.
The Softstart time is measured as the time from when the EN pin is asserted to when the output voltage has
reached 90% of its nominal value. There is typically a 100µs delay time from when the EN pin is asserted to
when the device starts the switching activity. The Softstart time depends on the load current, the input voltage,
and the output capacitor. The Softstart time in boost mode is longer then the time in buck mode. The total typical
Softstart time is 1ms.
The inductor current is able to increase and always assure a soft start unless a real short circuit is applied at the
output.
9.3.5
Short Circuit Protection
The TPS63024x provides short circuit protection to protect itself and the application. When the output voltage
does not increase above 1.2V, the device assumes a short circuit at the output and limits the input current to 3A.
Copyright © 2014, Texas Instruments Incorporated
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