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PDF HV809 Data sheet ( Hoja de datos )
| Número de pieza | HV809 | |
| Descripción | Off-Line High Voltage EL Lamp Driver | |
| Fabricantes | Supertex Inc | |
| Logotipo |  |
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Supertex inc.
HV809
Off-Line, High Voltage
EL Lamp Driver
Features
►► Processed with HVCMOS® technology
►► Input voltage up to 200V DC
►► 400V peak-to-peak output voltage
►► Output load up to 350nF (100in2 for 3.5nF/in2 lamp)
►► Adjustable output lamp frequency
►► Adjustable on/off pulsing frequency
Applications
►► Electronic organizers
►► Handheld portable computers
►► Display signs
►► Portable instrumentation equipment
General Description
The Supertex HV809 is an off-line, high voltage, EL lamp
driver integrated circuit designed for driving EL lamps of up to
350nF at 400Hz. The input supply voltage can be a rectified
nominal 120V AC source or any other DC source up to 200V.
The HV809 will supply the EL lamp with an AC square wave
with a peak-to-peak voltage of two times the input DC voltage.
The HV809 has two internal oscillators, a low voltage output
linear regulator, and a high voltage output H-bridge. The high
voltage output H-bridge frequency is set by an external resis-
tor connected between the REL-Osc and GND pins. The EL
lamp is connected between pins VA and VB. For the HV809 in
the 8-pin package, an external RC network can be connected
between the oscillator’s Osc1 and Osc2 pins to pulse the EL
lamp on and off.
For detailed circuit and application information please refer to
Application Note AN-H36.
Block Diagram
HVIN
Linear
Regulator
VDD
Osc1
Osc2
REL-Osc
GND
Logic
and
Osc
Q
Q
Q
Q
VA
VB
Doc.# DSFP-HV809
B071013
Supertex inc.
www.supertex.com
1 page  
Typical Waveform on VA, VB, and Differential Waveform VA - VB
(HVIN = 170V, REL = 1.0MΩ, and CL = 350nF)
VA
VB
VA - VB
HV809
Function Table
Pin Name Description
Osc1
Osc2
The Output H-bridge can be enabled and disabled by connecting the Osc1 pin to the GND and VDD
pins. The output can be left enabled by connecting the Osc1 pin to GND.
The RC network can be connected between the oscillator’s Osc1 and Osc2 pins to pulse the EL lamp
on and off.
VDD
Internal supply voltage.
REL-Osc
EL lamp frequency is controlled via an external REL resistor connected between the REL-Osc and GND
pins of the device.
VB VB side of the EL lamp driver H-bridge. Connection for one of the EL lamp terminals.
VA VA side of the EL lamp driver H-bridge. Connection for one of the EL lamp terminals.
HVIN
High voltage input supply pin.
GND
Ground pin.
Doc.# DSFP-HV809
B071013
Supertex inc.
5 www.supertex.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet HV809.PDF ] | |
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