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PDF HV826 Data sheet ( Hoja de datos )
| Número de pieza | HV826 | |
| Descripción | High Voltage EL Lamp Driver | |
| Fabricantes | Supertex Inc | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de HV826 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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HV826
High Voltage EL Lamp Driver IC
Features
► 1.8V to 3.5V operating supply voltage
► DC to AC conversion
► Output voltage regulation
► Adjustable output lamp frequency
► Adjustable converter frequency
► Enable/disable function
Applications
► Pagers
► Portable Transceiver
► Cellular phones
► Remote control units
► Calculators
General Description
The Supertex HV826 is a high voltage driver designed for
driving EL lamps. The input supply voltage range is from 1.8V
to 3.5V. 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 ±80V. The chip can be
enabled/disabled by connecting the resistor on the RSW-Osc
pin to VDD/GND.
The HV826 has two internal oscillators, a switching MOSFET,
and a high voltage EL lamp driver. The frequency for the
switching 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 REL-Osc pin and the VDD pin. An external inductor
is connected between the LX pin and VDD pin. A 0.01-0.1µF
capacitor is connected between the CS pin and GND. The EL
lamp is connected between the VA pin and the VB pin.
The switching MOSFET charges the external inductor and
discharges it into the capacitor at the CS pin. The voltage at
CS will start to increase. Once the voltage at CS reaches a
nominal value of 80V, the switching MOSFET is turned OFF
to conserve power. The output pins VA and VB are configured
as an H bridge and are switching in opposite states to achieve
160V peak-to-peak across the EL lamp.
HV826 Block Diagram
VDD
RSW
GND
Switch
Osc
Disable
+
C
_ VREF
VSEN
Q
Q
Output
Osc
LX
CS
VA
Q
REL
VB
Q
1 page  
HV826
8-Lead SOIC (Narrow Body) Package (LG)
8
6.00 ± 0.20
3.90 ± 0.10
4.90 ± 0.10
Note 2
Notes:
1. All dimensions in millimeters. Angles in degrees.
2. If the corner is not chamfered, then a Pin 1 identifier
must be located within the area indicated.
1
Top View
1.75 MAX
1.25 MIN
0.10 - 0.25
1.27BSC
0.31 - 0.51
Side View
5° - 15°
(4 PLCS)
0.17 - 0.25
45°
0.25 - 0.50
Note 2
0.40 - 1.27
0° - 8°
End View
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet HV826.PDF ] | |
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