Electronic Components Datasheet Search
  English  ▼

X  

Preview PDF HTML

LED7707TR Datasheet(PDF) 34 Page - STMicroelectronics

Part # LED7707TR
Description  6-rows 85 mA LEDs driver with boost regulator for LCD panels backlight
PDF  48 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LED7707TR Datasheet(HTML) 34 Page - STMicroelectronics

Back Button LED7707TR Datasheet HTML 30Page - STMicroelectronics LED7707TR Datasheet HTML 31Page - STMicroelectronics LED7707TR Datasheet HTML 32Page - STMicroelectronics LED7707TR Datasheet HTML 33Page - STMicroelectronics LED7707TR Datasheet HTML 34Page - STMicroelectronics LED7707TR Datasheet HTML 35Page - STMicroelectronics LED7707TR Datasheet HTML 36Page - STMicroelectronics LED7707TR Datasheet HTML 37Page - STMicroelectronics LED7707TR Datasheet HTML 38Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 34 / 48 page
background image
Application information
LED7707
34/48
6.4.4
Output capacitor choice
The choice of the output capacitor is mainly affected by the desired output voltage ripple.
Since the voltage across the LEDs can be considered almost constant, this ripple is
transferred across the current generators, affecting their dynamic response.
The output ripple can be estimated as (neglecting the contribution of ESR of COUT, very low
in case of MLCC):
Equation 31
where IL, peak is the inductor peak current (see Figure 21) calculated as:
Equation 32
whereas D, working in DCM, is:
Equation 33
defining M as:
Equation 34
Figure 21.
Inductor current in DCM operation
(
)
`
C
2
T
I
I
V
OUT
OFF
OUT
peak
,
L
OUT
⋅
⋅
−
=
Δ
⎩
⎨
⎧
=
=
=
⋅
⋅
=
V
2
.
13
V
@
A
762
.
1
V
8
.
10
V
@
A
915
.
1
L
F
D
V
I
max
,
IN
min
,
IN
sw
IN
peak
,
L
⎩
⎨
⎧
=
=
=
−
⋅
⋅
⋅
=
V
2
.
13
V
@
414
.
0
V
8
.
10
V
@
55
.
0
R
)
1
M
(
M
L
F
2
D
max
,
IN
min
,
IN
0
sw
⎩
⎨
⎧
=
=
=
V
2
.
13
V
@
015
.
2
V
8
.
10
V
@
463
.
2
V
V
M
max
,
IN
min
,
IN
IN
OUT
IL, peak
IL
t
TSW = 1/FSW
TON
TOFF
AM00593v1



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 35 36 37 38 39 40 41 42 43 44 45 46 47 48


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   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