Supertex inc.

Supertex inc.

www.supertex.com

Doc.# DSFP-HV513

C072413

HV513

Features

Applications

Typical Application Circuit

8-Channel Serial to Parallel Converter with High Voltage

Push-Pull Outputs, POL, Hi-Z, and Short Circuit Detect

General Description

The HV513 is a low voltage serial to high voltage parallel converter

with 8 high voltage push-pull outputs. This device has been designed

to drive small capacitve loads such as piezoelectric transducers. It can

also be used in any application requiring multiple high voltage outputs,

with medium current source and sink capabilities.

The device consists of an 8-bit shift register, 8 latches, and control logic

to perform the polarity select and blanking of the outputs. Data is shifted

through the shift register on the low to high transition of the clock.Adata

output buffer is provided for cascading devices. Operation of the shift

register is not affected by the LE, BL, POL, or the HI-Z control inputs.

Transfer of data from the shift register to the latch occurs when the LE

is high. The data in the latch is stored when LE is low. A high-Z (HI-Z)

pin is provided to set all the outputs in a high-Z state.

All outputs have short circuit protection that detects if the outputs have

reached the required output state. If output does not track the required

state, then the SHORT pin will be low. This output will pulse low during

the output transistion period under normal operation; see SC Timing

Diagram for details.

All outputs will have a break-before-make circuitry to reduce cross-over

current during output state changes.

The POL, BL, LE, and HI-Z inputs have an internal pull up resistor.

DIN

CLK

DOUT

LE

HiZ

POL

HV

HV

High Voltage

Power Supply

Supertex HV513

D

IN

to the next HV513 for cascading

Piezo

Element

BL

SHORT

8

/

FPGA

Low Voltage

Power Supply

Low Voltage

Shift Register

Latches

Output

Controller

High Voltage

Level

Translators

&

Push-Pull

Output

Buffers