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GS-R12F0182.0 Scheda tecnica(PDF) 7 Page - STMicroelectronics

Il numero della parte GS-R12F0182.0
Spiegazioni elettronici  2A DC/DC converter modules
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

GS-R12F0182.0 Scheda tecnica(HTML) 7 Page - STMicroelectronics

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4.6
Thermal shutdown
The shutdown block generates a signal that turns off the power stage if the temperature of
the internal chip goes higher than a fixed internal threshold (150ºC min
).
The sensing element of the chip is very close to the PDMOS area, so ensuring an accurate
and fast temperature detection.
An hysteresis of approximately 20
° C avoids that the devices turns on and off continuously.
4.7
Output voltage programming (GS-R12F0002.0 only)
The GS-R12F0002.0 output voltage is 5.54V
±4%, to reduce this value connect a resistor
between pin 11 (FB) and pin 10 (Vout).
The resistor must be located very close to the proper pins, to minimize the injected noise
(see Figure 2).
The resistor value is calculated using the following formula:
Rv = [(Vout - 1.235) * 11.3] / 5.54 - Vout) --[kΩ]
Vout can be adjusted between 1.235V (Rv = 0 Ω) and 5.54V (Rv = open)
4.8
Loop compensation (GS-R12F0002.0 only)
If required by particular load conditions, it is possible to change the feedback loop
compensation, adding an external capacitor between pin 11 (FB) and pin 10 (Vout), which
will act as speed up (see Figure 3).


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