Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

TK65914M Datasheet(PDF) 9 Page - TOKO, Inc

Part # TK65914M
Description  SMALL EL LAMP DRIVER
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  TOKO [TOKO, Inc]
Direct Link  http://www.toko.com
Logo TOKO - TOKO, Inc

TK65914M Datasheet(HTML) 9 Page - TOKO, Inc

Back Button TK65914M Datasheet HTML 5Page - TOKO, Inc TK65914M Datasheet HTML 6Page - TOKO, Inc TK65914M Datasheet HTML 7Page - TOKO, Inc TK65914M Datasheet HTML 8Page - TOKO, Inc TK65914M Datasheet HTML 9Page - TOKO, Inc TK65914M Datasheet HTML 10Page - TOKO, Inc TK65914M Datasheet HTML 11Page - TOKO, Inc TK65914M Datasheet HTML 12Page - TOKO, Inc TK65914M Datasheet HTML 13Page - TOKO, Inc Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 20 page
background image
May 2000 TOKO, Inc.
Page 9
TK6591x
clock is generated by dividing the high frequency clock by
128; this lower frequency clock corresponds to the drive
frequency of the EL Lamp. The laser-trimmed oscillators
are relatively insensitive to variations in temperature and
supply voltage. Therefore, they provide good control of the
lamp color emitted by the panel.
The circuit below illustrates a typical application where the
TK6591x is driving a 1-square-inch EL Lamp with a
capacitance of approximately 5 nF.
By keeping the ratio of the boost frequency and the H-
Bridge frequency constant, the peak-to-peak output voltage
from the TK6591x becomes primarily dependent upon the
capacitance of the EL Lamp, the peak current threshold of
the boost converter, and the value of the inductive element
used in the boost converter. For the TK6591x, the peak
current threshold is laser-trimmed to 32 mA. The capacitive
load of the EL Lamp is a function of panel size and is
typically fixed. Therefore, the high voltage output of the
boost converter can be set to a desired voltage by selecting
the appropriate value of the inductive element used in the
boost converter.
I
PEAK = Boost Peak Current Threshold (32 mA)
C
EL = Capacitance of EL Lamp
L = Inductance Value
V
HV = (IPEAK / 2) x
(L /C
EL) x 128
THEORY OF OPERATION
An Electroluminescent (EL) Lamp is a strip of plastic,
coated with a phosphorous material that emits light when
a high voltage AC signal is applied to the terminals of the
device. EL panels have the ability to light the entire panel
uniformly. Because of this, they are gradually becoming
more popular and widespread than LEDs. The amount of
light emitted from an EL Lamp is typically proportional to
the magnitude of the voltage applied to the lamp.
Furthermore, the color of the light emitted by an EL Lamp
is somewhat dependent upon the frequency of the applied
drive signal. For most applications, a peak-to-peak voltage
of 100 to 170 V, with a drive frequency of 175 to 400 Hz,
provides optimal trade-off between lamp intensity and
power consumption.
The capacitance of the EL Panel is typically proportional to
the size of the lamp (a 1 square inch EL Panel typically
exhibits approximately 5 nF of capacitance load). The
TK6591x series of devices has been optimized to drive EL
panels, which are approximately 1-2 square inches in size.
The Boost section of the TK6591x consists of a controller
for stepping up a relatively low voltage (2.7 to 6 V) to a
much higher voltage (50 to 90 V) needed to drive the EL
Lamp. The boost section of the TK6591x uses a proprietary
architecture which provides a relatively constant output
power, independent of the input supply, without the need
for sensing the high voltage output of the boost converter.
By controlling the peak current through the switching
element of the boost converter, the boost section provides
a constant output power independent of the input supply.
The H-Bridge section of the TK6591x switches the high
voltage output of the boost converter to the two terminals
of the EL Lamp. By alternately switching the terminals of
the lamp between the high voltage supply and ground, the
peak-to-peak voltage developed across the lamp is
effectively twice the high voltage generated by boost
converter. Furthermore, the TK6591x limits the magnitude
of the drive currents through the H-Bridge switches in
order to minimize the edge rates developed across the EL
Lamp. This approach protects the EL Panel from large
current spikes and reduces the likelihood of high frequency
noise components being injected into neighboring circuitry.
The Oscillator section of the TK6591x generates a fixed
frequency clock source for the previously described Boost
and H-Bridge sections, without the need for external
components. The high frequency output of the oscillator is
used for driving the boost controller. A lower frequency
CEL
5 nF
VIN
C1
22 nF
D1
EL +
HV
GND
IND
EL -
VCC
L1
FIGURE 1: TYPICAL APPLICATION


Similar Part No. - TK65914M

ManufacturerPart #DatasheetDescription
logo
TOKO, Inc
TK65920M TOKO-TK65920M Datasheet
199Kb / 20P
   MEDIUM EL LAMP DRIVER
TK65920MTL TOKO-TK65920MTL Datasheet
199Kb / 20P
   MEDIUM EL LAMP DRIVER
TK65920MTL/B0 TOKO-TK65920MTL/B0 Datasheet
199Kb / 20P
   MEDIUM EL LAMP DRIVER
TK65921M TOKO-TK65921M Datasheet
199Kb / 20P
   MEDIUM EL LAMP DRIVER
TK65921MTL TOKO-TK65921MTL Datasheet
199Kb / 20P
   MEDIUM EL LAMP DRIVER
More results

Similar Description - TK65914M

ManufacturerPart #DatasheetDescription
logo
Supertex, Inc
HV857DB1 SUTEX-HV857DB1 Datasheet
437Kb / 2P
   EL Lamp Driver
HV833DB1 SUTEX-HV833DB1 Datasheet
38Kb / 2P
   EL Lamp Driver
logo
TOKO, Inc
TK6592X TOKO-TK6592X Datasheet
199Kb / 20P
   MEDIUM EL LAMP DRIVER
logo
BOWIN ELECTRONIC CO.
M3802 BOWIN-M3802 Datasheet
43Kb / 3P
   EL LAMP DRIVER CONTROLLER
logo
TOKO, Inc
TK6593X TOKO-TK6593X Datasheet
194Kb / 16P
   LARGE EL LAMP DRIVER
logo
Supertex, Inc
HV832DB1 SUTEX-HV832DB1 Datasheet
445Kb / 2P
   Dual EL Lamp Driver
logo
IMP, Inc
IMP522 IMP-IMP522 Datasheet
128Kb / 6P
   Dual EL Lamp Driver
logo
SHENZHEN FUMAN ELECTRON...
SC1001 FUMAN-SC1001 Datasheet
158Kb / 5P
   EL LAMP DRIVER IC
logo
List of Unclassifed Man...
M5003 ETC-M5003 Datasheet
108Kb / 4P
   EL LAMP DRIVER IC
logo
IMP, Inc
IMP803 IMP-IMP803 Datasheet
162Kb / 8P
   HIGH-VOLTAGE EL LAMP DRIVER
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com