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Supertex inc.

www.supertex.com

HV857LDB1

Doc.# DSDB-HV857LDB1

A032813

General Description

The Supertex HV857LDB1 demoboard contains all

necessary circuitry to demonstrate the features of the

HV857L EL lamp driver.

Simply connect it to a power supply and a lamp. For

additional assistance in designing EL driver circuits,

please refer to application notes AN-H33 (effect of

external components on performance of Supertex

EL drivers).

Board Layout and Connection Diagram

Low Noise, High Voltage

EL Lamp Driver IC Demoboard

Connections:

EN - Enable Input

Enables/Disables the lamp driver. A logic high, (connect

to VDD) enables the driver and a logic low, (connect to

GND) disables the driver. This input can be connected to

a mechanical switch or to a logic circuit output that has a

source impedance of less than 20kΩ.

VDD - IC Supply

Supplies the HV857L EL driver IC. The supplied circuit is

optimized for 3.0V operation. The operating range can be

from 1.8 to 5.0V. Connect to the positive terminal of a power

supply.

VIN - Inductor Supply

Supplies the high voltage power converter. Connect to the

positive terminal of a power supply.

GND - Circuit Ground

Connect to VDD and VIN negative terminals. Supply bypass

capacitors for both VDD and VIN are provided on the demo

board. External supply bypass capacitors are not required.

VA and VB - Lamp Connections

Connect to an EL lamp. Polarity is irrelevant.

Note:

Make sure all the above connections are made before powering up the supply voltages.

HV857L

CDD

RSW

VDD VB

GND

VIN

CIN

REL

Actual Dimensions: 12mm x 12mm

Parameter Value

Input voltage: 1.8 to 5.0V

Typical supply current: 27mA

Lamp size: 3.0in2

Lamp frequency: 204Hz

Converter frequency: 70kHz

Specications

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)

1235 Bordeaux Drive, Sunnyvale, CA 94089

Tel: 408-222-8888

www.supertex.com

HV857LDB1

Doc.# DSDB-HV857LDB1

A032813

Typical Performance

Circuit Schematic

220µH*

3.3nF

100V

Lamp

BAS21

Enable Signal

ON = V

OFF = 0V

VDD

VIN

CIN

4.7µF

CDD

0.1µF

REL = 2.0MΩ

RSW = 560kΩ

* Murata Inductor LQH32CN221K21

HV857L

VDD

RSW-Osc

REL-Osc

GND LX

Bill of Materials

Component Description Package Manufacturer Part #

LX220µH Inductor - Murata LQH32CN221K21

CS3.3nF, 100V, NPO chip capacitor 0805 Novacap 0805N332K101NT

RSW 5%, 560kΩ resistor 0805 Any ---

REL 5%, 2MΩ resistor 0805 Any ---

CIN 4.7µF, 10V ceramic chip capacitor 0805 Any ---

CDD 0.1µF, 16V ceramic chip capacitor 0603 Any ---

Diode 250V fast recovery diode SOT-23 Diodes Inc BAS21

U1 EL driver IC MSOP-8 Supertex Inc HV857LMG-G

The above circuit may be optimized further based on specication of the lamp used.

Lamp Size

(in2)

VDD = VIN

(V)

IIN

(mA)

VCS

(V)

fEL

(Hz)

Brightness

ft-lm cd/m2

3.0 1.8 27.06 70 202 2.49 8.51

3.0 2.0 26.95 73 202 3.04 10.40

3.0 3.0 27.01 90 204 5.49 18.78

3.0 4.0 21.94 96 204 5.97 20.42

3.0 5.0 17.55 98 204 6.24 21.33

Produktspecifikationer

Varumärke:	Microchip
Kategori:	Inte kategoriserad
Modell:	HV857LDB1
Färg på produkten:	Wit
Snäll:	Kit voor vloeistofkoeling
Ljudnivå (hög hastighet:	27.2 dB
Maximalt luftflöde:	71.93 cfm
Antal fans:	3 ventilator(en)
Färg på belysningen:	Multi
Rotationshastighet (max):	1750 RPM
Rotationshastighet (min):	650 RPM
Belysning LED:	Ja
Lämplig plats:	Processor
Ventilator diameter:	120 mm
Spänningsklassificering:	12 V
Nominell nätspänning:	0.26 A
Processorsocklar som stöds:	LGA 1150 (Socket H3), LGA 1151 (Socket H4), LGA 1155 (Socket H2), LGA 1156 (Socket H), LGA 1200 (Socket H5), LGA 1700, Socket AM2, Socket AM2+, Socket AM3, Socket AM3+, Socket AM4, Socket AM5, Socket FM1, Socket FM2, Socket FM2+
Maximalt lufttryck:	1.86 mmH2O
Stöd för pulsbreddsmodulering:	Ja
Typ av lager:	Ventilatorlager
Matventilator (bxdxh):	120 x 120 x 25 mm
Fläktkontakt:	4-pin
Radiatormaterial:	Aluminium
Pumpljudnivå:	12 dB
Pompspänning:	12 V
Pumpströmförbrukning:	3.96 W
Kylarens bredd:	394 mm
Kylarens djup:	119.6 mm
Kylarens höjd:	27.2 mm
Pompkontakt:	3-pin
Pump genomsnittliga felintervall (MTTF):	70000 uur
Fan Mean Failure Interval (MTTF):	160000 uur
Säkerhetsströmstyrka:	0.37 Ah
Pompbredd:	81 mm
Pumpdjup:	76 mm
Pomphoogte:	47 mm