MD1213K6-G

The MD1213 is a high-speed dual-MOSFET driver. It is designed to drive high-voltage P-channel and N-channel MOSFETs for medical ultrasound and other applications requiring a high-output current for a capacitive load. The high-speed input stage of the MD1213 can operate from 1.8V to 5V logic interface with an optimum operating input signal range of 1.8V to 3.3V. An adaptive threshold circuit is used to set the level translator switch threshold to the average of the input logic 0 and logic 1 levels. The input logic levels may be ground referenced even though the driver is putting out bipolar signals. The level translator uses a proprietary circuit, which provides DC coupling together with high-speed operation.

The output stage of the MD1213 has separate power connections enabling the output signal L and H levels to be chosen independently from the supply voltages used for the majority of the circuit. The output stage is capable of peak currents of up to ±2A, depending on the supply voltages used and load capacitance present.

The OE pin serves a dual purpose. First, its logic H level is used to compute the threshold voltage level for the channel input level translators. Second, when OE is low, the outputs are disabled with the A output high and the B output low. This assists in properly pre-charging the AC coupling capacitors that may be used in series in the gate drive circuit of an external PMOS and NMOS transistor pair.