TE –
SOLE
– OB
High-Voltage EL Lamp Driver
Package Options
Device
HV8051
HV8053
Input Voltage
1.0V to 1.6V
2.4V to 3.5V
8-Lead SO
HV8051LG
HV8053LG
Die
HV8051X
HV8053X
HV8051
HV8053
Ordering Information
Features
Processed with HVCMOS
®
technology
1.0V to 3.5V operating supply voltage
DC to AC conversion
Adjustable output lamp frequency to control lamp color,
lamp life, and power consumption
Adjustable converter frequency to eliminate harmonics and
optimize power consumption
General Description
The Supertex HV8051 and HV8053 are high-voltage drivers
designed for driving EL lamps of typically 4nF and 12nF for a 1V
and 3V operation. The input supply voltage range is from 1.0V to
1.6V for HV8051 and 2.4V to 3.5V for HV8053. The device uses
a single inductor and a minimum number of passive components.
Typical output voltage that can be applied to the EL lamp is
±50V
for HV8051 and
±70V
for HV8053.
The HV8051/HV8053 has two internal oscillators, a switching
bipolar junction transistor (BJT), and a high-voltage EL lamp
driver. The frequency for the switching BJT is set by an external
resistor connected between the R
sw-osc
pin and the supply pin
V
DD
. The EL lamp driver frequency is set by an external resistor
connected between R
EL-osc
pin and the V
DD
pin. An external
inductor is connected between the L
x
and V
DD
pins. A 0.1µF
capacitor is connected between C
s
and GND pins. The EL lamp
is connected between V
A
and V
B
pins.
The switching BJT charges the external inductor and discharges
it into the 0.1µF capacitor at C
s
. The voltage at C
s
will start to
increase. The outputs V
A
and V
B
are configured as an H bridge
and are switching in opposite states to achieve a peak-to-peak
voltage of two times the V
CS
voltage across the EL lamp.
Applications
Pagers
Portable transceiver
Cellular phones
Remote control units
Calculators
Pin Configuration
15
Absolute Maximum Ratings*
Supply voltage, V
DD
Operating temperature range
Storage temperature range
SO-8 power dissipation
Note:
*All voltages are referenced to GND.
ςΑ
V
DD
R
SW-osc
C
s
L
x
1
2
3
4
8
7
6
5
-0.5V to +4.5V
-25°C to +85°C
-65°C to +150°C
400mW
R
EL-osc
V
A
V
B
GND
top view
SO-8
15-9
SUPERTEX [ Supertex, Inc ]
