HV809
Off-Line, High Voltage EL Lamp Driver
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
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 voltage output
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 pins 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.
For detailed circuit and application information please refer to
Application Note AN-H36.
Applications
►
Electronic organizers
►
Handheld portable computers
►
Display signs
►
Portable instrumentation equipment
Block Diagram
HV
IN
Linear
Regulator
Q
V
A
Q
V
DD
Osc1
Osc2
R
EL-Osc
Q
Logic
and
Osc
V
B
Q
GND
1
HV809
Ordering Information
Device
HV809
Package Options
8-Lead SO
HV809LG-G
8-Lead SO + Slug
HV809SG-G
7-Lead TO-220
HV809K2-G
-G indicates package is RoHS compliant (‘Green’)
Absolute Maximum Ratings
Parameter
HV
IN
, Input voltage
V
DD
, Internal logic voltage
Operating temperature Range
Storage temperature Range
Power dissipation:
SO-8
SO-8 + Slug
7-Lead TO-220
Value
+210V
+15V
-25°C to +85°C
-55°C to +150°C
500mW
1.5 Watts
15Watts
Pin Configurations
HV
IN
V
DD
Osc2
Osc1
1
2
3
4
8
7
6
5
V
A
V
B
GND
R
EL-Osc
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
SO-8
(top view)
1 2 3 4
5 6 7
HV
IN
V
DD
Osc2
Osc1
1
2
3
4
8
7
6
5
V
A
V
B
GND
R
EL-Osc
TO-220
Absolute Maximum Ratings are those values beyond which damage to the
device may occur. Functional operation under these conditions is not implied.
Continuous operation of the device at the absolute rating level may affect
device reliability. All voltages are referenced to device ground.
SO-8 w/ Heat Slug
(top view,
Heat Slug Potential is at ground)
Electrical Characteristics
DC Characteristics
(Over recommended operating conditions unless otherwise specified
Symbol
Parameter
Min
-
I
IN
High voltage supply current
-
-
I
INQ
Quiescent supply current
-
I
SINK
I
SOURCE
I
Osc1
V
H
V
A-B
V
DD
I
DD (OUT)
Osc2 sink current
Osc2 source current
Osc1 logic input leakage current
Osc1 hysteresis voltage
Min differential output voltage across
lamp
Internal supply voltage
Minimum output V
DD
current
-
-
-
-
-
8.0
-
-
300
100
±10
2.5
-
10
-
100
-
-
-
-
400
12
4.0
μA
μA
μA
μA
V
V
V
mA
HV
IN
= 170V, R
EL-osc
= 1.0MΩ,
Osc1 = V
DD
, No Load
V
Osc2
= 1.0V
V
Osc2
= V
DD
-1.0V
V
Osc1
= 0V and V
DD
---
HV
IN
= 200V
No load on V
DD
For HV809K2, ΔV
DD
= 1.0V
-
-
9.0
400
mA
μA
Typ
-
Max
70
- T
A
= 25°C)
Units
mA
Conditions
HV
IN
= 170V, R
EL
= 1.0MΩ,
C
L
= 350nF
HV
IN
= 170V, R
EL
= 1.0MΩ,
C
L
= 50nF
HV
IN
= 170V, R
EL-Osc
= 1.0MΩ,
Osc1 = GND, No Load
2
Embedded System
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