Microchip HV852DB1 Bedienungsanleitung


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Supertex inc.
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.
VA
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
EN
VDD VA
VB
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)
©2013 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited. Supertex inc.
1235 Bordeaux Drive, Sunnyvale, CA 94089
Tel: 408-222-8888
www.supertex.com
2
HV852DB1
Doc.# DSDB-HV852DB1
A032813
Circuit Schematic
Bill of Materials
Part Description Package Manufacturer Part Number
REL 1%, 1.5MΩ resistor 0603 Any ---
CDD 2.2µF, 6.3V, ceramic chip capacitor 0603 Any ---
U1 EL driver IC 10-Lead DFN Supertex Inc HV852K7-G
The above circuit may need to be optimized further based on specication of the lamp used.
Typical Performance
The specic external components used in the above circuit are: C
DD = 2.2µF, 6.3V ceramic capacitor and R
EL = 1.5MΩ.
The following was observed when driving a 0.93in
2 green lamp and 1.5in
2 green lamp.
Lamp Size
(in2)
VDD
(V)
IDD
(mA)
VPEAK
(V)
fEL
(Hz)
Lamp Brightness
(ft-lm) (cd/m2)
0.93 2.4 15.6 79 245 4.30 14.7
0.93 3.0 14.9 79 245 5.10 17.4
0.93 3.6 14.7 79 245 5.32 18.2
0.93 4.2 15.1 79 245 5.50 18.8
0.93 5.0 15.7 79 245 5.61 19.2
1.50 2.4 19.0 66 245 2.81 9.60
1.50 3.0 23.4 79 245 4.77 16.3
1.50 3.6 23.5 79 245 5.26 18.0
1.50 4.2 23.7 79 245 5.53 18.9
1.50 5.0 24.1 79 245 5.73 19.6
EL
Lamp
VDD = ON
GND = OFF
CDD
VDD
+
-
REL
VDD
VB
REL
GND
VA
EN
CLKIN
CLKEN
VDD
GND
1
2
3
4
5 6
7
8
9
10
HV852


Produktspezifikationen

Marke: Microchip
Kategorie: Nicht kategorisiert
Modell: HV852DB1

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