Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

IC-WJZ Datasheet(PDF) 7 Page - IC-Haus GmbH

Part # IC-WJZ
Description  LASER DIODE DRIVER
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ICHAUS [IC-Haus GmbH]
Direct Link  http://www.ichaus.biz
Logo ICHAUS - IC-Haus GmbH

IC-WJZ Datasheet(HTML) 7 Page - IC-Haus GmbH

Back Button IC-WJZ Datasheet HTML 3Page - IC-Haus GmbH IC-WJZ Datasheet HTML 4Page - IC-Haus GmbH IC-WJZ Datasheet HTML 5Page - IC-Haus GmbH IC-WJZ Datasheet HTML 6Page - IC-Haus GmbH IC-WJZ Datasheet HTML 7Page - IC-Haus GmbH IC-WJZ Datasheet HTML 8Page - IC-Haus GmbH IC-WJZ Datasheet HTML 9Page - IC-Haus GmbH IC-WJZ Datasheet HTML 10Page - IC-Haus GmbH IC-WJZ Datasheet HTML 11Page - IC-Haus GmbH Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 12 page
background image
iC-WJ, iC-WJZ
LASER DIODE DRIVER
Rev C1, Page 7/12
For the monitor diode current of 0.25 mA the resistor
RSET is calculated as:
RSET =
CR1 ∗ V (ISET )
Iav (AMD)
=
3 ∗ 1.22 V
0.25 mA
= 14.6 k Ω
with Electrical Characteristics No. 301 for V(ISET) and
No. 108 (iC-WJZ) for current ratio CR1.
Averaging control
The control of the average optical laser power requires
a capacitor at pin CI. This capacitor is used for aver-
aging and must be adjusted to the selected pulse rep-
etition frequency and the charging current preset with
RSET. The ratios are linear in both cases, i.e. the ca-
pacitor CI must be increased in size proportionally as
the pulse repetition frequency slows or the current from
ISET increases:
CI ≥
440 ∗ I(ISET )
f ∗ V (ISET )
=
440
f ∗ RSET
Example
Pulse repetition frequency 100 kHz, RSET = 10 kΩ:
CI = 440 nF, chosen 470 nF.
Otherwise the charging of the capacitor CI during the
pulse pauses (with I(ISET) = 1.22 V / RSET) will create
an excessive mean value potential and may destroy
the laser diode during the next pulse. The capacitor CI
is correctly dimensioned when the current through the
laser diode and the optical output signal do not show
any overshots following the rising edge.
I(AMD)
V(CI)
V(IN)
Time
2.552 V
2.550 V
0 A
250 uA
0 V
5.0 V
Figure 3: Steady-state averaging control, f(IN) =
100 kHz (1:1), CI = 470 nF, RSET = 10 kΩ
In steady-state condition and for a pulse duty factor of
50 % (pulse/pause 1:1), signals as shown in Figure 3
are present at the IC pins.
Figure 4 shows the corresponding signals for a pulse
duty factor of 20 %. The influence of the pulse duty
factor on the peak value of the monitor current pro-
portional to the laser current is apparent. The average
kept constant by the control (RSET unchanged) means
a peak value increased by the factor 2.5. The pulse
duty factor for which RSET was dimensioned should
therefore be kept constant if possible.
Time
I(AMD)
600 uA
0 A
3.120 V
3.118 V
V(IN)
5.0 V
0 V
V(CI)
Figure 4: Steady-state averaging, f(IN) = 100 kHz
(1:4), CI = 470 nF, RSET = 10 kΩ
0 s
2 ms
4 ms
6 ms
8 ms
10 ms
12 ms
I(KLD)
0 A
V(CI)
3.0 V
2.0 V
1.0 V
0 V
Figure 5: Turn-on behavior, f(IN) = 100 kHz (1:1), CI
= 470 nF, RSET = 10 kΩ
Turn-on and turn-off behavior
Capacitor CI also determines the starting time from
switching on the supply voltage VCC to steady-state
laser pulse operation or after a discharge of CI by
the watchdog. The following applies to estimating the
starting time (Figure 5):
Ton =
2.5 V ∗ CI
I(ISET )
=
2.5 V ∗ CI ∗ RSET
1.22 V


Similar Part No. - IC-WJZ

ManufacturerPart #DatasheetDescription
logo
IC-Haus GmbH
IC-WJZ ICHAUS-IC-WJZ Datasheet
114Kb / 3P
   APPLICATION NOTES
More results

Similar Description - IC-WJZ

ManufacturerPart #DatasheetDescription
logo
Mitsubishi Electric Sem...
M66512P MITSUBISHI-M66512P Datasheet
143Kb / 10P
   LASER-DIODE DRIVER
M66510P MITSUBISHI-M66510P Datasheet
224Kb / 10P
   LASER-DIODE DRIVER
logo
IC-Haus GmbH
WJZMSOP8 ICHAUS-WJZMSOP8 Datasheet
577Kb / 12P
   LASER DIODE DRIVER
logo
Roithner LaserTechnik G...
EU-38-PD ROITHNER-EU-38-PD Datasheet
95Kb / 2P
   Laser Diode Driver
logo
IC-Haus GmbH
WJZSO8 ICHAUS-WJZSO8 Datasheet
577Kb / 12P
   LASER DIODE DRIVER
logo
ELM Technology Corporat...
ELM185 ELM-TECH-ELM185 Datasheet
819Kb / 10P
   Laser Diode Driver
logo
ELM Electronics
ELM185 ELM-ELM185 Datasheet
919Kb / 10P
   Laser Diode Driver
logo
ELM Technology Corporat...
ELM185-SERIES ELM-TECH-ELM185-SERIES Datasheet
919Kb / 10P
   Laser Diode Driver
logo
List of Unclassifed Man...
HY6410 ETC1-HY6410 Datasheet
199Kb / 2P
   Laser Diode Driver
logo
Sony Corporation
CXB1818Q SONY-CXB1818Q Datasheet
225Kb / 17P
   Laser Diode Driver
logo
List of Unclassifed Man...
HY6330 ETC-HY6330 Datasheet
176Kb / 2P
   Laser Diode Driver
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


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