hv826 Supertex, Inc., hv826 Datasheet

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hv826

Manufacturer Part Number
hv826
Description
High Voltage El Lamp Driver Ic
Manufacturer
Supertex, Inc.
Datasheet

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Features
Applications
HV826 Block Diagram
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
Pagers
Portable Transceiver
Cellular phones
Remote control units
Calculators
RSW
GND
VDD
REL
High Voltage EL Lamp Driver IC
Switch
Osc
Disable
C
+
_
V
REF
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 confi gured
as an H bridge and are switching in opposite states to achieve
160V peak-to-peak across the EL lamp.
V
SEN
Output
Osc
Q
Q
Q
Q
LX
CS
VA
VB
HV826

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hv826 Summary of contents

Page 1

... RSW GND REL 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 ...

Page 2

... V -0 VDD RSW-Osc 2 7 HV826 REL-Osc GND 4 5 Top View 8-Lead SOIC/ 8-Lead MSOP =25°C) A Max Units Conditions 6.0 Ω 100mA 1.5V. See Fig.1 IN 100 LOW SW-Osc 1.8V DD ...

Page 3

... B I rightness vs. nductor 3. 1. 100 220 330 560 I V (µH) nductor alue Lamp 7 6 1N4148 220µH 0.1µF 100V Brightness 5.00ft- alue 6.0 5.0 4.0 3.0 2.0 1.0 0.0 900 HV826 4 90 ...

Page 4

... I V (µH) nductor alue 4 2.0KΩ 8 10nF 7 Equivalent to 6 3in 2 lamp 1N4148 560µH 0.01µF 100V Brightness 4.0ft- alue 5.0 Brightness (ft-lm) 4.0 3.0 2.0 1.0 0.0 560 900 HV826 4 90 ...

Page 5

... MAX 0.10 - 0.25 4.90 ± 0.10 Notes: 1. All dimensions in millimeters. Angles in degrees. Note the corner is not chamfered, then a Pin 1 identifier Top View 0.17 - 0.25 1.25 MIN 0.31 - 0.51 1.27BSC Side View 5 must be located within the area indicated. 5° - 15° 0.25 - 0.50 (4 PLCS) Note 2 45° 0° - 8° 0.40 - 1.27 End View HV826 ...

Page 6

... JEDEC Registration MO-187, Variation AA, Issue E, Dec. 2004. Drawings not to scale. (The package drawing(s) in this data sheet may not refl ect the most current specifi cations. For the latest package outline information go to http://www.supertex.com/packaging.html.) Doc.# DSFP-HV826 A111306 E E1 Seating Plane ...

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