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Car inductive-load driver promises space, cost savings

Posted: 23 Sep 2015     Print Version  Bookmark and Share

Keywords:Diodes  inductive-load driver  automotive  MOSFET 

Diodes Inc. has announced an inductive-load driver geared for automotive inductive-load switching applications, such as window, door latch and antenna relays, solenoids and small DC motors. The DMN61D8LVTQ incorporates on-chip integrated Zener diodes and bias resistors that cut the need for several external components, which saves cost and reduces the PCB footprint, stated the company.

Inductive-load switching normally requires a freewheeling diode to suppress the voltage spike that typically results when the switch is opened. The DMN61D8LVTQ inductive-load driver avoids this requirement by using a low-side circuit configuration that employs back-to-back Zener diodes to provide an active over-voltage drain clamp of the internal MOSFET. The MOSFET is also protected from potentially destructive transient voltages by ensuring that this clamp voltage is set below the MOSFET's avalanche breakdown voltage, added Diodes.

System design is eased with inputs that can be directly driven by standard logic devices, microcontrollers and FPGAs. These inputs feature ESD protection provided by further Zener stacks. The MOSFETs are rated with a drain-source voltage (VDS) of 60V and a maximum gate-source voltage (VGS) of ±12V. The DMN61D8LVTQ dual-channel inductive load driver is available in the space saving TSOT26 package.





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