Microchip HV861DB1 Manual

Microchip Ikke kategoriseret HV861DB1

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Supertex inc.

www.supertex.com

HV861DB1

Doc.# DSDB-HV861DB1

A032813

General Description

The Supertex HV861DB1 demoboard contains all the

necessary circuitry to demonstrate the features of the HV861

dual EL Lamp driver.

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

Figure 1.

A 2.2µF capacitor is connected between VREF and GND. It

allows the lamp to slowly (in about 400ms) brighten up/dim

down during power up/power down. The dimming feature is

common to both lamps.

Board Layout

Dimmable, Low Noise, Dual EL Lamp

Driver Demoboard

Specications

Parameter Value

VDD input voltage: 2.5V to 4.5V

VIN inductor supply voltage: 3.2V to 4.2V

Typical supply current: 28mA

Lamp size: 4.5in2

Lamp frequency: 188Hz

Converter frequency: 98kHz

Connections:

EN1 and EN2: Lamp Selection

CMOS logic inputs which enable/disable the lamp drivers.

When EN1 is connected to VDD/GND, Lamp 1 (EL1) will

be ON/OFF. When EN2 is connected to VDD/GND, Lamp 2

(EL2) will be ON/OFF.

VDD: IC Supply

Supplies the HV861 EL driver IC. The supplied circuit is op-

timized for 3.0V operation.

VIN: Inductor Supply

Supplies the high voltage power converter. The demoboard

is optimized for 3.2V to 4.2V operation

GND: Circuit Ground

Connect to VDD and VIN negative terminals. Supply bypass

capacitor for both VDD and VIN are provided on the demo

board. External supply bypass capacitors are not necessary.

EL1 and EL2: Lamp Connections

Connects to Lamps 1 and 2.

COM1 and COM2: Lamp Connections

Connects to the other side of Lamps 1 and 2.

Actual Dimensions: 26mm x 24mm

Notes:

All of the above connections must be made before powering up the supply voltages.

The VREG pin should not be touched after power-up.

EL1

COM1

COM2

EL2

VDD

EN1

EN2

GND

VIN

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	HV861DB1

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