HV3922

The HV3922 is a monolithic high-voltage quad-output driver that is designed to be used in conjunction with the Supertex VN2222NC*, a separate N-channel DMOS FET quad array, whose device characterics are briefly described below. Together, these devices per-form a 220V push-pull function that is especially suited for driving PIN diodes in applications such as frequency- hopping radios, microwave communication systems and phased array radar.

Used as a microwave or RF switch, the HV3922 has 4 highvoltage P-channel outputs: PD0, PD1, PD2 and PD3. Additional controls are Chip Select (CS) and Output Enable (OE) functions. The HV3922 also has an output fault detection function that protects the outputs from damage by putting them into a high impedance state when a short is detected. The HV3922 provides 4 low-voltage outputs-DRV0, DRV1, DRV2 and DRV3-that drive the gates of the 4 N-channel FETs in the VN2222NC device. See the diagram below for an example of the push-pull output structure that these two devices provide.

For detailed electrical characteristics of the VN2222NC, please see the data sheet in Chapter 8. Currently, the HV3922 is available in through-hole and surface-mount ceramic packages that are suitable for military applications, while the VN2222NC is offered in ceramic quad and discrete packages (VN2224N2 and VN2224N3). For commercial product availability, please consult the factory.