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: PD
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—DRV
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.
, PD1, PD2 and PD3. Additional
0
, DRV1, DRV2 and DRV3—that drive
0
Push-Pull Configuration
CC
HV39
V
V
LL
HIGH
FAULT
PD0
PD3
DRV0
DRV3
V
220V
Push-Pull
Output
•
•
*VN2222NC
(1 of 4
•
•
LL
FETs)
V
CS
4
ENA
OE
D0 – D3
GND
5V
Digital
Control
* VN2222NC is an N-channel DMOS FET quad array recommended for use in
conjunction with HV39 outputs to form four 220V push-pull outputs. Each of the
four devices has a max R
of 220V.
12/13/01
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the
Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.
2. The output threshold is internally tested for each P
A) P
driving high with output > V
D(N)
OR
B) P
driving Low with output < V
D(N)
The fail condition occurs when OE = H and conditions for “pass” are not satisfied.
3. Fault output = V
condition has been detected for one of the outputs. The Fault output shall remain in the low state, regardless of the state of the output which initiated the fault status, until
the next falling edge of OE. Whenever OE = L, the Fault output is forced to V
time the OE input is set to H.
4. H>L indicates falling edge (H to L).
5. HI-Z indicates no current is sourced to output P
6. P/F indicates “Pass” or “Fail” fault threshold conditions.
indicates a fault has been detected in at least one of the P
FL
TH (MAX)
TH (MIN)
output; the pass condition occurs when OE = H and:
D(N)
, or may occurs if P
, or may occur if P
.
D(N)
driving high and output > V
D(N)
driving low and output < V
D(N)
output loads when OE = H. All other outputs shall function normally when a fault
D(N)
, and the fault latch is reset. If the fault condition persists, the fault response repeats each