Hi All,
Stumbled across a datasheet of BSP450 (miniProfet) from Siemens (Infineon). In that datasheet, the pins are denoted as OUT, GND, IN, Vbb .... I am unable to draw reference to the conventions used in Mosfet (drain,source,gate). Put it simply, which of the pins denotes the drain,source or gate?
Pardon me for such a simple question ... Thanks !! ywz
Hello,
The behavior of the BSP450 is different from that of a P-channel mosfet. As a high-side switch, the source of a P-channel mosfet is connected to Vbat and the drain to the output. Whether a P-mosfet is on or off, depends on the voltage between Vbat and the gate (as the source is connected to Vbat). To turn on the P-mosfet, the gate voltage must be below Vbat.
This device has its input (pin 3) referenced to the ground (pin 2). Input data is given under "input" on page 2. When V(3-2) > 3V, the switch will be on, when V(3-2) < 1.82V, the switch will be off. You can drive this device directly from 3.3V or
5V logic without requiring level translation (as is required mostly for P-channel mosfets used as a high-side switch). Check whether the minimum operating voltage conditions are met (see page 3, operating parameters).Best regards,
Wim PA3DJS
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