Automotive inductive-load driver saves space & cost
Designed for automotive inductive load-switching applications, such as window, door latch and antenna relays, solenoids and small DC motors, the DMN61D8LVTQ dual-channel inductive-load driver has been introduced by Diodes Incorporated. The on-chip integrated Zener diodes and bias resistors eliminate the need for several external components, reducing both the cost and the PCB footprint.
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.
System design is eased with inputs that can be directly driven by standard logic devices, MCUs and FPGAs. These inputs feature ESD protection provided by further Zener stacks. The MOSFETs are rated with a drain-source voltage of 60V and a maximum gate-source voltage of ±12V.
The DMN61D8LVTQ TSOT-26 dual-channel inductive load driver is priced at $0.14 each in 3,000 unit quantities.
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