Motore di ricerca datesheet componenti elettronici
  Italian  ▼
ALLDATASHEETIT.COM

X  

7447709821 Scheda tecnica(PDF) 11 Page - STMicroelectronics

Il numero della parte 7447709821
Spiegazioni elettronici  Digital constant-current controller
Download  34 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

7447709821 Scheda tecnica(HTML) 11 Page - STMicroelectronics

Back Button 7447709821 Datasheet HTML 7Page - STMicroelectronics 7447709821 Datasheet HTML 8Page - STMicroelectronics 7447709821 Datasheet HTML 9Page - STMicroelectronics 7447709821 Datasheet HTML 10Page - STMicroelectronics 7447709821 Datasheet HTML 11Page - STMicroelectronics 7447709821 Datasheet HTML 12Page - STMicroelectronics 7447709821 Datasheet HTML 13Page - STMicroelectronics 7447709821 Datasheet HTML 14Page - STMicroelectronics 7447709821 Datasheet HTML 15Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 34 page
background image
AN3151
Overview of inverse buck converter
Doc ID 17051 Rev 1
11/34
The output voltage =VLED = N* VF(Typical)=40 V
Where N=Number of LEDs per string=10 and Vf is the typical forward voltage (4 V).
Forward voltage has some variation in respect to the typical value and the LED
manufacturer reports also the minimum forward voltage Vfmin and maximum forward voltage
Vfmax.
These values must be considered for dimensioning of the power converter.
The LED characteristics are strongly dependent on manufacturer and are reported in their
corresponding datasheets.
In particular, these are necessary to calculate the duty cycle variation range.
Design spec calculation:
Equation 2
Equation 3
δ=Ton/Ts and expressed in terms of voltage for a buck converter:
Equation 4
Equation 5
Equation 6
The current ripple admitted for this application is less than 10 % depending on the following
formula:
Equation 7
ILEDAVG = Average LED current
ΔI
LED
10
%
Ripple current on the LEDs
Table 1.
Electrical specs (continued)
Description
Symbol
Value
Unit
VOUTmin= VLEDmin=N*Vfmin=10*3.85 V=38.5 V
VOUTmax=VLEDmax=N*Vfmax=10*4.15 V=41.5 V
δ=Vout/Vin
δmin= V
OUTmin/Vin=80.2 %
δmax= V
OUTmax/Vin=86.4 %
⎛ −
=
Δ
Δ
=
Δ
Vin
Vout
1
L
*
Fs
Vout
I
%
10
I
I
min
min
L
L
LED


Codice articolo simile - 7447709821

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Wurth Elektronik GmbH &...
7447709821 WURTH-7447709821 Datasheet
189Kb / 3P
   POWER-CHOKE WE-PD
More results

Descrizione simile - 7447709821

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Unisonic Technologies
USL1601 UTC-USL1601 Datasheet
174Kb / 6P
   CONSTANT CURRENT CONTROLLER
logo
Texas Instruments
UCC28710 TI1-UCC28710_15 Datasheet
1Mb / 34P
[Old version datasheet]   Constant-Voltage, Constant-Current Controller
logo
HTC Korea TAEJIN Techno...
TJ1052 HTC-TJ1052 Datasheet
181Kb / 4P
   CONSTANT VOLTAGE & CONSTANT CURRENT CONTROLLER
TJ1051 HTC-TJ1051_08 Datasheet
192Kb / 4P
   CONSTANT VOLTAGE & CONSTANT CURRENT CONTROLLER
logo
Texas Instruments
UCC28722 TI1-UCC28722 Datasheet
1Mb / 34P
[Old version datasheet]   Constant-Voltage, Constant-Current Controller
logo
BCD Semiconductor Manuf...
AP4313 BCDSEMI-AP4313_10 Datasheet
685Kb / 12P
   CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER
logo
Seaward Electronics Inc...
SE1052 SEAWARD-SE1052 Datasheet
288Kb / 8P
   Constant Voltage and Constant Current Controller
logo
Diodes Incorporated
AP4305 DIODES-AP4305 Datasheet
451Kb / 10P
   CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER
AP4313 DIODES-AP4313 Datasheet
359Kb / 9P
   CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER
AP4312Q DIODES-AP4312Q Datasheet
562Kb / 11P
   CONSTANT VOLTAGE AND CONSTANT CURRENT CONTROLLER
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34


Scheda tecnica Scarica

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEETIT.COM
Lei ha avuto il aiuto da alldatasheet?  [ DONATE ] 

Di alldatasheet   |   Richest di pubblicita   |   contatti   |   Privacy Policy   |   scambio Link   |   Ricerca produttore
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