USA - Supertex ( http://www.supertex.com ) introduced the MD7120, a high voltage, high speed, N-channel, full-bridge power MOSFET driver for use in Class-D audio amplifiers. The MD7120 provides a broad range of output voltage from 12V to 200V, has +/-5 nanosecond dead time matching and rise or fall times of less than 30 nanoseconds with a typical 1nF load.
The N-channel MOSFETs are driven from normal logic level inputs by directly coupled internal level translators. The MD7120 can be connected directly to a 200V supply voltage and can drive over 100W output with 90% efficiency.
Its internal core consists of control logic, level translators, a bootstrap-powered high side gate driver and over-temperature, under-voltage and current protection circuits. The thresholds of the current protection for both the high and low sides are resistor-programmable.
"The MD7120 has been optimized for parameters critical to Class-D audio performance such as high efficiency and low EMI," states Ahmed Masood, Vice President of Marketing for Supertex. "Additionally, this MOSFET driver provides up to a 3.0A peak driving current with matched output resistance and channel-to-channel propagation delay for lower total harmonic distortion and noise."