Microchip HV852DB1 Manual de Usario

Microchip No categorizado HV852DB1

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Supertex inc.

www.supertex.com

HV852DB1

Doc.# DSDB-HV852DB1

A032813

The Supertex HV852DB1 demoboard contains all necessary

circuitry to demonstrate the features of the HV852 EL lamp

driver.

Simply connect it to a power supply and a lamp, as shown

below. For additional assistance in implementation of the

HV852 circuit, please refer to the HV852 data sheet.

High Voltage, Low Noise,

Inductorless EL Lamp Driver Demoboard

Parameter Value

VDD input voltage: 2.4 to 5.0V

Supply current: 25mA

Lamp size: 1.5in2

Lamp frequency: 245Hz

Connections:

EN - Enable Input

Enables/Disables the lamp driver. Logic high (VDD), enables

the driver, and a logic low (GND), disables the driver. This

input may be connected to a mechanical switch, or to a logic

circuit output.

VDD - IC Supply

Supplies the HV852 EL driver IC. The supplied circuit is

optimized for 2.4 to 5.0V operation.

and VB - Lamp Connections

Connects to an EL lamp. Polarity is irrelevant.

GND - Circuit Ground

Connect to VDD negative terminals. Supply bypass capacitor

for VDD is provided on the demo board. External supply

bypass capacitors are not necessary.

CLKEN - Clock Enable

To use external clock for setting the EL lamp frequency, this

pin will need to be connected to VDD. To set the lamp frequency

via REL, this pin will need to be connected to GND.

CLKIN - Logic Input

An external logic clock applied to this pin can be used to set

the EL lamp frequency. When using external clock signal,

REL

will need to be removed, and REL pin will need to be

connected to GND. CLKEN will need to be connected to V DD

when an external clock signal is used. Connect both CLK EN

and CLKIN to GND when not in use.

General Description Specications

Board Layout and Connection Diagram

GND

CLKIN

VDD VA

CLKEN

REL CDD

HV852DB1

HV852

Actual Dimensions: 13mm x 8.0mm

Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives

an adequate “product liability indemnification insurance agreement.” does not assume responsibility for use of devices described, and limits its liabilit Supertex inc. y

to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and

specifications are subject to change without notice. For the latest product specifications refer to the (website: http//wwwSupertex inc. .supertex.com)