HV8051 Datasheet, PDF (1/4 Pages) Supertex, Inc – High-Voltage EL Lamp Driver

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High-Voltage EL Lamp Driver
Ordering Information
Device
HV8051
HV8053
Input Voltage
1.0V to 1.6V
2.4V to 3.5V
Package Options
8-Lead SO
Die
HV8051LG
HV8051X
HV8053LG
HV8053X
HV8051
HV8053
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
Applications
Pagers
Portable transceiver
Cellular phones
Remote control units
Calculators
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.
Pin Configuration
15
Absolute Maximum Ratings*
ςΑ
Supply voltage, V_DD
Operating temperature range
Storage temperature range
SO-8 power dissipation
-0.5V to +4.5V
-25°C to +85°C
-65°C to +150°C
400mW
V_DD 1
R
SW-osc
2
C_{s 3}
L_{x 4}
R 8
EL-osc
7
V
A
6 ^V_B
5 ^GND
Note:
*All voltages are referenced to GND.
top view
SO-8
15-9