Diodes' AH9485 / 86 are single-chip motor-driver ICs with an integrated H-bridge switch and high-sensitivity Hall sensors for the driving of small, low-profile, single-coil, brushless DC motors and cooling fans. The output stage “soft switching” minimizes acoustic switching noise and electromagnetic interference (EMI) providing a low-noise solution. For system flexibility, the family offers versatile DC voltage and PWM speed control options. The AH9485 / 86 feature rotor lock detect, shutdown, and automatic restart. The AH9485 features an open-drain frequency generator tachometer (FG) output, while the AH9486 has a rotation detect alarm (RD) output, both to interface externally to monitor speed and rotation status. They are both packaged in the flat-pin TSOT26F package to help place the devices in a PCB cut-out to minimize overall component height.