1
HV809
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's osc1 and osc2 pins to pulse the EL lamp on and off.
Off-Line High Voltage EL Lamp Driver
Ordering Information
Absolute Maximum Ratings
HV
IN
, Input Voltage
+210V
V
DD
, Internal Logic Voltage
+15V
Operating Temperature Range
-25
C to +85C
Storage Temperature Range
-55
C to +150C
Power Dissipation
SO-8
500mW
SO-8 + Slug
1.5 Watts
7 Pin TO-220
15 Watts
Note:
*All voltages are referenced to GND.
Features
Processed with HVCMOS
technology
Input voltage up to 200V DC
400V peak-to-peak output voltage
Output load up to 350nF (100 in
2
for 3.5nF/in
2
lamp)
Adjustable output lamp frequency
Adjustable On/Off pulsing frequency
Applications
Electronic Organizers
Handheld Portable Computers
Display Signs
Portable Instrumentation Equipment
Package Options
Device
8-Lead SO
8-Lead SO + Slug
7-Pin TO-220
Die
HV809
HV809LG
HV809SG
HV809K2
HV809X
Pin Configurations
HV
IN
V
A
V
DD
V
B
osc2
GND
osc1
R
EL-osc
7 -Pin
TO-220
TAB: GND
1 2 3 4
5 6 7
Pin 01: osc1
Pin 02: V
DD
Pin 03: R
EL-osc
Pin 04: GND
Pin 05: V
B
Pin 06: V
A
Pin 07: HV
IN
TAB:
GND
For detailed circuit and application information, please refer
to Application Note AN-H36.
1
2
3
4
8
7
6
5
top view
SO-8
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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HV809
Symbol
Parameter
Min
Typ
Max
Units
Conditions
f
EL
V
A-B
output drive frequency
320
400
480
Hz
R
EL-osc
= 1.0M
, osc1 = GND,
C
L
= 350nF
0.8
1.0
1.2
KHz
R
EL-osc
= 390K
, osc1 = GND,
C
L
= 150nF
t
r
Output rise time
180
250
s
CL = 150nF, HV
IN
= 170V
t
f
Output fall time
50
100
s
CL = 150nF, HV
IN
= 170V
AC Characteristics
(Over recommended operating conditions unless otherwise specified, T
A
= 25
C)
Symbol
Parameter
Min
Typ
Max
Units
Conditions
HV
IN
High voltage input
50
200
V
C
L
Load capacitance
350
nF
R
EL-osc
= 1.0M
, HV
IN
= 170V
150
nF
R
EL-osc
= 390K
, HV
IN
= 170V
T
A
Operating temperature
-25
85
C
Recommended Operating Conditions
osc1
Outputs V
A
and V
B
GND
Enabled
V
DD
Disabled
Function Table
Electrical Characteristics
Symbol
Parameter
Min
Typ
Max
Units
Conditions
I
IN
High voltage supply current
70
mA
HV
IN
= 170V, R
EL
= 1.0M
,
C
L
= 350nF
9
mA
HV
IN
= 170V, R
EL
= 1.0M
,
C
L
= 50nF
I
INQ
Quiescent supply current
400
A
HV
IN
= 170V, R
EL-osc
= 1.0M
,
osc1 = GND, No Load
100
A
HV
IN
= 170V, R
EL-osc
= 1.0M
osc1 = V
DD
, No Load
I
SINK
osc2 sink current
300
A
V
osc2
= 1.0V
I
SOURCE
osc2 source current
100
A
V
osc2
= V
DD
-1.0V
I
osc1
osc1 logic input leakage current
10
A
V
osc1
= 0V and V
DD
V
H
osc1 hysteresis voltage
2.5
V
V
A-B
Min differential output voltage across lamp
400
V
HV
IN
= 200V
V
DD
Internal supply voltage
8
10
12
V
No load on V
DD
I
DD (OUT)
Maximum output V
DD
current
4
mA
For HV809K2,
V
DD
= 1.0V
DC Characteristics
(Over recommended operating conditions unless otherwise specified, T
A
= 25
C)
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HV809
Typical Application
Figure 2: Pulsing EL Lamp
Figure 3: Push Button Delayed Turn Off
EL Lamp
R
EL
R
C
3 to 12VDC
50V to 200VDC
DC-DC
Converter
HV809
V
batt
HV
IN
V
DD
osc2
osc1
R
EL-osc
GND
V
B
V
A
1
2
3
4
8
7
6
5
EL Lamp
R
EL
R
C
3 to 12VDC
50V to 200VDC
DC-DC
Converter
HV809
V
batt
HV
IN
V
DD
osc2
osc1
R
EL-osc
GND
V
B
V
A
1
2
3
4
8
7
6
5
1235 Bordeaux Drive, Sunnyvale, CA 94089
TEL: (408) 744-0100 FAX: (408) 222-4895
www.supertex.com
11/12/01
2001 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited.
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