Description The TDE1708DFT is an integrated power switch with up to 48 V power supply capability. Two output configurations are possible: Load to GND (high side mode) Load to VS (low side mode) Especially dedicated to proximity detectors, its internal +5 V supply can be used to supply external circuits (See also AN495). A signal is internally generated to block the In signal, and prevent activation of the output switch, as long as an abnormal condition is detected. The power-on transition, as well as the chip over temperature and the output overcurrent, concur to the generation of such signal. A minimum delay of 25 ms (Typ. value) is added to the trailing edge of such signal to ensure that a stable normal situation is present when the signal disappears. The delay (of the disappearance of the block signal; no delay at its on set) can be further increased connecting a capacitor between pin3 and ground. It can drive resistive or inductive loads. Features ■ Low side or high side switch configuration ■ 6 V to 48 V supply voltage range ■ Overload and short circuit protections ■ Internal voltage clamping ■ Supply and output reversal protection ■ Thermal shutdown ■ GND and VS open wire protection ■ Adjustable delay at switch on ■ Indicator status led driver ■ +5 V regulated aux. voltage ■ High burst immunity
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