HV839MG-G Supertex, HV839MG-G Datasheet

Display Drivers Dual EL Lamp Drvr

HV839MG-G

Manufacturer Part Number
HV839MG-G
Description
Display Drivers Dual EL Lamp Drvr
Manufacturer
Supertex
Datasheet

Specifications of HV839MG-G

Driver Type
EL Lamp Drivers
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
MSOP-10
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
Applications
Typical Application Circuit
Supertex inc.
Independent input control for lamp selection
Split supply capability
Patented output timing
One miniature inductor to power both lamps
Low shutdown current
Wide input voltage range 2.0 to 5.8V
Output voltage regulation
No SCR output
Available in small packages (10-lead MSOP and
10-lead DFN)
Mobile cellular phones, dual display
Keypad and LCD backlighting
Portable instrumentation
Dual segment lamps
Hand held wireless communication devices
V
0 = OFF
EN
V
= ON
V
DD
IN
+
-
+
-
Supertex inc.
V
0 = OFF
EN
= ON
High Voltage Dual EL Lamp Driver IC
C
C
1. The bigger sized lamp should be tied to EL1 and the smaller
DD
IN
sized lamp to EL2 terminals (pins 10 and 9 respectively)
1235 Bordeaux Drive, Sunnyvale, CA 94089
RSW-Osc
1
2
3
4
5
C1
VDD
RSW-Osc
C2
GND
HV839
General Description
The Supertex HV839 is a high voltage driver designed for driving
two EL lamps with a combined area of 3.5in
voltage range is from 2.0 to 5.8V. The device is designed to
reduce the amount of audible noise emitted by the lamp. This
device uses a single inductor and minimum number of passive
components to drive two EL lamps. The nominal regulated
output voltage of ±90V is applied to the EL lamps. The two EL
lamps can be turned ON and OFF by the two logic input control
pins, C1 and C2. The device is disabled when both C1 and C2
(pins 1 and 4) are at logic low.
The HV839 has an internal oscillator, a switching MOSFET, and
two high voltage EL lamp drivers. An external resistor connected
between the RSW-Osc pin and the voltage supply pin VDD sets
the frequency for the switching MOSFET. The EL lamp driver
frequency is set by dividing the MOSFET switching frequency
by 128. An external inductor is connected between the LX and
the VDD pins. Depending on the EL lamp size, a 1.0 to 10.0nF,
100V capacitor is connected between CS and GROUND. The
two EL lamps are connected between EL1 to COM and EL2
to COM. The switching MOSFET charges the external inductor
and discharges it into the capacitor at CS. The voltage at CS
increases. Once the voltage at CS reaches a nominal value of
90V, the switching MOSFET is turned OFF to conserve power.
The outputs EL1 to COM and EL2 to COM are configured as H
bridges and switch in opposite states to achieve 180V across
the EL lamp.
COM
EL1
EL2
CS
LX
10
9
8
7
6
Tel: 408-222-8888
L
X
D
EL Lamp 1
C
www.supertex.com
S
1
EL Lamp 2
2
. The input supply
HV839
1

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HV839MG-G Summary of contents

Page 1

... The bigger sized lamp should be tied to EL1 and the smaller Supertex inc. General Description The Supertex HV839 is a high voltage driver designed for driving two EL lamps with a combined area of 3.5in voltage range is from 2.0 to 5.8V. The device is designed to reduce the amount of audible noise emitted by the lamp. This device uses a single inductor and minimum number of passive components to drive two EL lamps ...

Page 2

... Supply voltage DD T Operating temperature A Supertex inc. Pin Configurations 10-Lead MSOP 3.00x3.00mm body 1.10mm height (max) 0.50mm pitch HV839MG-G Value -0.5V to +7.5V -0.5V to +120V Product Marking -65°C to +150°C -40°C to +85°C H839 Package may or may not include the following marks θ ...

Page 3

... Switching transistor duty cycle I Input logic low current going into the control pin IL I Input logic high current going into the control pin IH V Logic input low voltage EN-L V Logic input high voltage EN-H Supertex inc. = 2.6 to 5.5V Min - 2.0 80 160 - - - - - ...

Page 4

... Murata LQH32CN221K21 3. The bigger sized lamp should be tied to EL1 and the smaller sized lamp to EL2 terminals (pins 10 and 9 respectively) Device Lamp EL1 HV839MG-G or HV839K6-G Both EL1 and EL2 ON Supertex inc. VDD LX Control Logic & ...

Page 5

... IN Audible Noise Reduction This section describes a method (patented) developed at Supertex to reduce the audible noise emitted by the EL lamps used in application sensitive to audible noise. The waveform takes the shape of approximately 2RC time con- stants for rising and 2RC time constants for falling, where ...

Page 6

... Lamp = 1.3in , EL2 Lamp = 0.93in 2.0 2.5 3.0 3.5 V (V) IN Brightness 2.0 2.5 3.0 3 100 Supertex inc 3.0V 4.0 4.5 5.0 IN 4.0 4.5 5 Brightness vs Inductor Value 200 300 400 Inductor Value (mH) 1235 Bordeaux Drive, Sunnyvale, CA 94089 2.0 2.5 3.0 3.5 4 ...

Page 7

... EL lamp 2 connection. For optimum performance, the smaller of the two lamps should be con- 9 EL2 nected to this pin. EL lamp 1 connection. For optimum performance, the larger of the two lamps should be connected 10 EL1 to this pin. Supertex inc. can be determined as: SW-OSC1 = (220 x 500 kΩ. EL1 1235 Bordeaux Drive, Sunnyvale, CA 94089 7 decreases. A 220kΩ ...

Page 8

... Dimension NOM 0.90 0.02 (mm) MAX 1.00 0.05 JEDEC Registration MO-229, Variation VEED-5, Issue C, Aug. 2003. * This dimension is not specified in the JEDEC drawing. Drawings not to scale. Supertex Doc. #: DSPD-10DFNK63X3P050, Version B041309. Supertex inc. E Note 1 (Index Area D/2 x E/2) θ Seating Plane A3 Note 2 ...

Page 9

... JEDEC Registration MO-187, Variation BA, Issue E, Dec. 2004. * This dimension is not specified in the JEDEC drawing. Drawings are not to scale. Supertex Doc. #: DSPD-10MSOPMG, Version F041309 (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to http://www.supertex.com/packaging.html.) does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives Supertex inc ...

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