Page 1
Off-Line High Voltage EL Lamp Driver
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
Ordering Information
Package Options
Device 8-Lead SO 8-Lead SO + Slug 7-Pin TO-220 Die
HV809 HV809LG HV809SG HV809K2 HV809X
HV809
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/in2 lamp)
❏ Adjustable output lamp frequency
❏ Adjustable On/Off pulsing frequency
Applications
❏ Electronic Organizers
❏ Handheld Portable Computers
❏ Display Signs
❏ Portable Instrumentation Equipment
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
connected between V
A
and GND pins. The EL lamp is
EL-osc
and VB. 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.
Pin Configurations
1
HV
IN
2
V
DD
3
osc2 GND
4
osc1 R
8
V
A
7
V
B
6
5
EL-osc
Absolute Maximum Ratings
top view
SO-8
HVIN, Input Voltage +210V
VDD, Internal Logic Voltage +15V
Operating Temperature Range -25°C to +85°C
Storage Temperature Range -55°C to +150°C
Power Dissipation SO-8 500mW
Note:
*All voltages are referenced to GND.
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.
SO-8 + Slug 1.5 Watts
7 Pin TO-220 15 Watts
For detailed circuit and application information, please refer
to Application Note AN-H36.
1
Page 2
Electrical Characteristics
HV809
DC Characteristics (Over recommended operating conditions unless otherwise specified, T
= 25°C)
A
Symbol Parameter Min Typ Max Units Conditions
70 mA
I
IN
High voltage supply current
9mA
I
INQ
Quiescent supply current 400 µA
100 µA
I
SINK
I
SOURCE
I
osc1
V
H
V
A-B
V
DD
I
DD (OUT)
osc2 sink current 300 µAV
osc2 source current 100 µAV
osc1 logic input leakage current ±10 µAV
osc1 hysteresis voltage 2.5 V
Min differential output voltage across lamp 400 V HVIN = 200V
Internal supply voltage 8 10 12 V No load on V
Maximum output VDD current 4 mA For HV809K2, ∆VDD = 1.0V
AC Characteristics (Over recommended operating conditions unless otherwise specified, T
HVIN = 170V, REL = 1.0MΩ,
C
= 350nF
L
HV
= 170V, REL = 1.0MΩ,
IN
CL = 50nF
= 170V, R
HV
IN
EL-osc
osc1 = GND, No Load
= 170V, R
HV
IN
EL-osc
osc1 = VDD, No Load
= 1.0V
osc2
= VDD -1.0V
osc2
= 0V and V
osc1
= 25°C)
A
DD
DD
Symbol Parameter Min Typ Max Units Conditions
f
EL
t
r
t
f
V
output drive frequency 320 400 480 Hz R
A-B
0.8 1.0 1.2 KHz R
Output rise time 180 250 µs CL = 150nF, HV
= 1.0MΩ, osc1 = GND,
EL-osc
= 350nF
C
L
= 390KΩ, osc1 = GND,
EL-osc
= 150nF
C
L
IN
Output fall time 50 100 µs CL = 150nF, HVIN = 170V
= 1.0MΩ,
= 1.0MΩ
= 170V
Recommended Operating Conditions
Symbol Parameter Min Typ Max Units Conditions
HV
C
T
IN
L
A
High voltage input 50 200 V
Load capacitance 350 nF R
150 nF R
Operating temperature -25 85 °C
= 1.0MΩ, HVIN = 170V
EL-osc
= 390KΩ, HVIN = 170V
EL-osc
Function Table
osc1 Outputs VA and V
GND Enabled
V
DD
Disabled
B
2
Page 3
Block Diagram
HV
IN
HV809
∗Τηε ΕΝΑβλ
R
EL-osc
V
DD
osc1
osc2
GND
Linear
Regulator
Logic
and
osc
Q
V
A
Q
Q
V
B
Q
Typical Applications
120VAC
Figure 1: AC Off-Line EL Lamp
Cin
GND
Enable
Disable
Cdd
HV809
Rel
HV
EL Lamp
IN
3
Page 4
Typical Application
HV809
3 to 12VDC 50V to 200VDC
V
batt
DC-DC
Converter
Figure 2: Pulsing EL Lamp
3 to 12VDC 50V to 200VDC
V
batt
DC-DC
Converter
HV
1
IN
V
8
A
EL Lamp
V
2
DD
osc2
3
V
GND
7
B
6
R
osc1 R
4
HV809
EL-osc
5
R
EL
C
HV
1
IN
8
V
A
EL Lamp
V
2
DD
V
7
B
Figure 3: Push Button Delayed Turn Off
GND
3
osc2
osc1 R
R
4
EL-osc
HV809
6
5
R
EL
C
©2001 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited.
11/12/01
1235 Bordeaux Drive, Sunnyvale, CA 94089
TEL: (408) 744-0100 • FAX: (408) 222-4895
4
www.supertex.com
Loading...