HV823LG Supertex, HV823LG Datasheet - Page 6

• Manufacturer Part Number: HV823LG
• Description: Display Drivers EL LAMP DRIVER
• Manufacturer: Supertex

Specifications of HV823LG

• Driver Type: EL Lamp Drivers
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8 Narrow
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Enable/Disable Configuration
The HV823 can be easily enabled and disabled via a logic
control signal on the R
4. The control signal can be from a microprocessor. R
and R
of microamperes will be drawn from the logic signal when it
is at a logic high (enable) state. When the microprocessor
signal is high the device is enabled and when the signal is
low, it is disabled.
Fig. 4: Enable/Disable Configuration
Split Supply Configuration Using a Single Cell (1.5V) Battery
The HV823 can also be used for handheld devices operating
from a single cell 1.5V battery where a regulated voltage is
available. This is shown in Fig. 5. The regulated voltage can
be used to run the internal logic of the HV823. The amount of
current necessary to run the internal logic is typically 100µA
Split Supply Configuration for Battery Voltages of Higher than 9.5V
Fig. 5 can also be used with high battery voltages, such as
12V, as long as the input voltage, V
Fig. 5: Split Supply Configuration
EL
are typically very high values, therefore, only 10’s
OFF = 0V
ON = V
ON = V
OFF = 0
Supertex inc.
DD
DD
V
DD
V
= Regulated
IN
V
= Battery
IN
SW
Voltage
= V
Voltage
+
-
and R
DD
+
-
EL
Remote Enable
resistors as shown in Fig.
Remote Enable
●
DD
4.7µF
15V
1235 Bordeaux Drive, Sunnyvale, CA 94089
, to the HV823 device
0.1µF*
L
X
L
X
1N4148
100V
C
S
1N4148
100V
C
R
R
S
EL
SW
R
R
SW
SW
EL
6
Enable/Disable Table
1.0nF
1
2
3
4
at a V
provide the current without being loaded down. The HV823
used in this configuration can also be enabled/disabled via
logic control signal on the R
Fig. 4.
is within its specifications of 2.0V to 9.5V.
RSW-Osc
VDD
CS
LX
1
2
3
4
DD
VDD
RSW-Osc
CS
LX
HV823
R
of 3.0V. Therefore, the regulated voltage could easily
SW
HV823
●
Resistor
REL-Osc
V
0V
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DD
GND
REL-Osc
VA
VB
GND
VB
VA
8
7
6
5
8
7
6
5
SW
●
and R
www.supertex.com
EL Lamp
EL
EL Lamp
resistors as shown in
Disable
HV823
Enable
HV823