HV823LG Supertex, HV823LG Datasheet

Display Drivers EL LAMP DRIVER

HV823LG

Manufacturer Part Number
HV823LG
Description
Display Drivers EL LAMP DRIVER
Manufacturer
Supertex
Datasheet

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

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
HV823LG
Manufacturer:
SUPERTEX
Quantity:
3 046
Part Number:
HV823LG
Manufacturer:
SUPERTEX
Quantity:
20 000
Part Number:
HV823LG-G
Manufacturer:
SUPERTEX
Quantity:
20 000
Features
Applications
Block Diagram
Supertex inc.
Processed with HVCMOS
2.0 to 9.5V operating supply voltage
DC to AC conversion
180V peak-to-peak typical output voltage
Large output load capability typically 50nF
Permits the use of high-resistance elastomeric
lamp components
Adjustable output lamp frequency to control lamp
color, lamp life, and power consumption
Adjustable converter frequency to eliminate
harmonics and optimize power consumption
Enable/disable function
Low current draw under no load condition
Handheld personal computers
Electronic personal organizers
GPS units
Pagers
Cellular phones
Portable instrumentation
Supertex inc.
RSW-Osc
REL-Osc
Enable *
GND
VDD
®
High Voltage EL Lamp Driver IC
technology
* Enable is available in die form only.
Switch
Osc
Disable
1235 Bordeaux Drive, Sunnyvale, CA 94089
C
+
_
General Description
The Supertex HV823 is a high-voltage driver designed for driving EL
lamps of up to 50nF. EL lamps greater than 50nF can be driven for
applications not requiring high brightness. The input supply voltage
range is from 2.0V to 9.5V. The device uses a single inductor and
a minimum number of passive components. The nominal regulated
output voltage that is applied to the EL lamp is ±90V. The chip can
be enabled by connecting the resistors on the RSW-Osc pin and
the REL-Osc pin to the VDD pin, and disabled when connected to
GND.
The HV823 has two internal oscillators, a switching MOSFET and a
high-voltage EL lamp driver. The frequency of the switching converter
MOSFET is set by an external resistor connected between the RSW-
Osc pin and the VDD supply pin. The EL lamp driver frequency is
set by an external resistor connected between the REL-Osc pin and
the VDD pin. An external inductor is connected between the LX pin
and the VDD pin. A 0.01µF to 0.1µF capacitor is connected between
the CS pin and the GND. The EL lamp is connected between the
VA and VB pins.
The switching MOSFET charges the external inductor and discharg-
es it into the C
Once the voltage at C
ing MOSFET is turned OFF to conserve power. The output pins VA
and VB are configured as an H-bridge and are switched in opposite
states to achieve 180V peak-to-peak across the EL lamp.
For additional information, see Application Notes AN-H33 and
AN-H34.
V
REF
S
capacitor. The voltage at C
Tel: 408-222-8888
Output
Osc
S
reaches a nominal value of 90V, the switch-
Q
Q
Q
Q
www.supertex.com
S
will start to increase.
VA
VB
CS
LX
HV823

Related parts for HV823LG

HV823LG Summary of contents

Page 1

... Enable is available in die form only. Supertex inc. General Description The Supertex HV823 is a high-voltage driver designed for driving EL lamps 50nF. EL lamps greater than 50nF can be driven for applications not requiring high brightness. The input supply voltage range is from 2.0V to 9.5V. The device uses a single inductor and a minimum number of passive components. The nominal regulated output voltage that is applied to the EL lamp is ± ...

Page 2

... Ordering Information 8-Lead SOIC 4.90x3.90mm body Device 1.75mm height (max) 1.27mm pitch HV823 HV823LG-G -G indicates the package is RoHS compliant - “Green” Absolute Maximum Ratings Parameter Supply voltage Output voltage Power dissipation Storage temperature Operating temperature Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device ...

Page 3

... Larger values may be required depending upon supply impedance. Typical Performance Curves for Fig. 1 using 3.0in Brightness vs Supertex inc. (Low input current with moderate output brightness) 2.0MΩ 1 VDD 750KΩ 2 RSW-Osc 1N4148 0.1µF HV823 100V I IN 25mA 65V EL Lamp 2 vs. V ...

Page 4

... Larger values may be required depending upon supply impedance. Typical Performance Curves for Fig. 2 using 6.0in V vs (V) IN Brightness vs. V 8.0 7.5 7.0 6.5 6.0 5 (V) IN Supertex inc. 2.0MΩ VDD 1 750KΩ 2 RSW-Osc 1N4148 0.01µF HV823 100V 1.0nF 16V I IN 25mA 75V EL Lamp ...

Page 5

... Larger values may be required depending upon supply impedance. Typical Performance Curves for Fig. 3 using 12.0in V vs (V) IN Brightness vs. V 8.0 7.5 7.0 6.5 6.0 5 (V) IN Supertex inc. 1 VDD 330KΩ 2 RSW-Osc 560µ 1N4148 4 LX 0.1µF 2 0.01µF HV823 1.0nF 100V 16V 30mA 75V 380Hz ...

Page 6

... 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 OFF = Regulated DD Voltage + V = Battery IN Voltage - Supertex inc. Enable/Disable Table VDD RSW-Osc 4.7µF 1N4148 ...

Page 7

... Lamp greater than the power dissipation of the package (400mW), an external resistor in series with one side of the lamp is recommended to help reduce the package power dissipation. Supertex inc. will decrease. The color of the EL lamp is dependent upon its frequency. CS capacitor may also be needed when driving large EL lamp due to increase in switching larger than 1 ...

Page 8

... JEDEC Registration MS-012, Variation AA, Issue E, Sept. 2005. * This dimension is not specified in the JEDEC drawing. Drawings are not to scale. Supertex Doc. #: DSPD-8SOLGTG, Version I041309. (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to http://www.supertex.com/packaging.html.) does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives Supertex inc ...

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