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GS-12V0181.9 Datasheet(PDF) 8 Page - STMicroelectronics |
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GS-12V0181.9 Datasheet(HTML) 8 Page - STMicroelectronics |
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8 / 14 page 
Application information GS-R12FP 8/14 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 (150 °C 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-R12FP0001.9 only) The GS-R12FP0001.9 output voltage is 5.54 V ±4 %, to reduce this value connect a resistor between pin 10 (FB) and pin 9 (Vout). The resistor must be located very close to the proper pins, to minimize the injected noise (see Figure 4). The resistor value is calculated using the following formula: Rv = [(Vout - 1.235) * 11.3] / 5.54 - Vout) --[kΩ] Vout can be adjusted between 1.235 V (Rv = 0 Ω) and 5.54 V (Rv = open) 4.8 Loop compensation (GS-R12FP0001.9 only) If required by particular load conditions, it is possible to change the feedback loop compensation, adding an external capacitor between pin 10 (FB) and pin 9 (Vout), which will act as speed up (see Figure 5). |
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