HV830
High Voltage EL Lamp Driver
Ordering Information
Package Options
8-Lead SO
HV830LG
Device
Input Voltage
Die
HV830
2.0V to 9.5V
HV830X
Features
General Description
❏ Processed with HVCMOS® technology
❏ 2.0V to 9.5V operating supply voltage
❏ DC to AC conversion
TheSupertexHV830isahigh-voltagedriverdesignedfordriving
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 100V. The chip can be enabled by connecting the
resistors on RSW-osc and REL-osc to VDD and disabled when
connected to GND.
❏ 200V peak-to-peak typical output voltage
❏ Large output load capability – typically 50nF
❏ Permits the use of high-resistance elastomeric lamp
connectors
❏ Adjustable output lamp frequency to control lamp color,
The HV830 has two internal oscillators, a switching MOSFET,
and a high-voltage EL lamp driver.The frequency for the switch-
ing converter MOSFET is set by an external resistor connected
between the RSW-osc pin and the supply pin VDD. The EL lamp
driver frequency is set by an external resistor connected be-
tween REL-osc pin and the VDD pin. An external inductor is
connected between the Lx and VDD pins. A 0.01µF to 0.1µF
capacitor is connected between CS and GND. The EL lamp is
connected between VA and VB.
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
❏ Very low standby current – 30nA typical
The switching MOSFET charges the external inductor and
discharges it into the Cs capacitor.The voltage at Cs will start to
increase. Once the voltage at Cs reaches a nominal value of
100V, the switching MOSFET is turned OFF to conserve power.
The outputs VA and VB are configured as an H-bridge and are
switchedinoppositestatestoachieve200Vpeak-to-peakacross
the EL lamp.
Applications
❏ Handheld personal computers
❏ Electronic personal organizers
❏ GPS units
❏ Pagers
Pin Configuration
❏ Cellular phones
❏ Portable instrumentation
Absolute Maximum Ratings*
Supply Voltage, VDD
-0.5V to +10V
-0.5V to +120V
-25°C to +85°C
-65°C to +150°C
400mW
1
2
3
4
8
7
6
5
VDD
RSW-osc
Cs
REL-osc
VA
Output Voltage, VCs
Operating Temperature Range
Storage Temperature Range
Power Dissipation
VB
Lx
GND
Note:
SO-8
*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
1
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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