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Adjustable On/Off pulsing frequency
General Description
The Supertex HV809 is an off-line high voltage EL lamp driver
integrated circuit designed for driving EL lamps of up to 350nF at
400Hz. The input supply voltage can be a rectified nominal 120V
AC source or any other DC source up to 200V. The HV809 will
supply the EL lamp with an AC square wave with a peak-to-peak
voltage of two times the input DC voltage.
The HV809 has two internal oscillators, a low output voltage
linear regulator, and a high voltage output H-bridge. The high
voltage output H-bridge frequency is set by an external resistor
connected between the R
EL-osc
and GND pins. The EL lamp is
connected between V
A
and V
B
. For the HV809 in the 8-pin
package, an external RC network can be connected between the
oscillator鈥檚 osc1 and osc2 pins to pulse the EL lamp on and off.
Applications
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Electronic Organizers
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Handheld Portable Computers
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Display Signs
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Portable Instrumentation Equipment
Pin Configurations
HV
IN
V
DD
osc2
osc1
1
2
3
4
8
7
6
5
V
A
V
B
GND
R
EL-osc
Absolute Maximum Ratings
HV
IN
, Input Voltage
V
DD
, Internal Logic Voltage
Operating Temperature Range
Storage Temperature Range
Power Dissipation
SO-8
SO-8 + Slug
7 Pin TO-220
Note:
*All voltages are referenced to GND.
top view
SO-8
TAB: GND
Pin 01:
Pin 02:
Pin 03:
Pin 04:
Pin 05:
Pin 06:
Pin 07:
TAB:
osc1
V
DD
R
EL-osc
GND
V
B
V
A
HV
IN
GND
+210V
+15V
-25擄C to +85擄C
-55擄C to +150擄C
500mW
1.5 Watts
15 Watts
12 3
456
7
7 -Pin
TO-220
For detailed circuit and application information, please refer
to Application Note AN-H36.
11/12/01
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the
Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.
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