38026

38026 is a monolithic full bridge stage in Multipower BCD Technology. The device is particularly designed to make the output stage of classD audio amplifier capable to deliver 100W undistorted output power on 8W load. The input pins have threshold proportional to VIbias pin voltage. The commutation speed of the output stage is settable with an extenal resistor (Curref pin) to choice for each application the best compromise of THD versus EMI and current spikes.

The overcurrent protection works in two steps, the first one, at a lower value limits the current terminating the pulse (independently to the input) when the current in the power output MOS reaches a first threshold: it is aimed to act in case of overload and its effect is to stabilize the mean current in the load to a limit value. The second step shuts down completely the device and restarts the power on sequence if the current reaches a second (higher) threshold: it is aimed to act in case of short circuit, when the first limitation can fail.