Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

SD42511 Fiches technique(PDF) 4 Page - Silan Microelectronics Joint-stock

No de pièce SD42511
Description  1A WHITE LED DRIVER WITH PWM DIMMING CONTROLLER
Download  9 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  SILAN [Silan Microelectronics Joint-stock]
Site Internet  http://www.silan.com.cn
Logo SILAN - Silan Microelectronics Joint-stock

SD42511 Fiches technique(HTML) 4 Page - Silan Microelectronics Joint-stock

  SD42511 Datasheet HTML 1Page - Silan Microelectronics Joint-stock SD42511 Datasheet HTML 2Page - Silan Microelectronics Joint-stock SD42511 Datasheet HTML 3Page - Silan Microelectronics Joint-stock SD42511 Datasheet HTML 4Page - Silan Microelectronics Joint-stock SD42511 Datasheet HTML 5Page - Silan Microelectronics Joint-stock SD42511 Datasheet HTML 6Page - Silan Microelectronics Joint-stock SD42511 Datasheet HTML 7Page - Silan Microelectronics Joint-stock SD42511 Datasheet HTML 8Page - Silan Microelectronics Joint-stock SD42511 Datasheet HTML 9Page - Silan Microelectronics Joint-stock  
Zoom Inzoom in Zoom Outzoom out
 4 / 9 page
background image
SD42511
1.
PWM Dimming Function
SD42511 has internal PWM dimming function. When PWM voltage is open or connects to high level, the
chip is working normally; when PWM voltage connects to low level, COMP pin disconnects with the chip, the
charge of the capacitor is in hold state, voltage level holds, and the output of current comparator is high,
transistor is off without output current. When PWM signal is high, COMP pin is connected with the chip to
improve the startup speed of the chip. Adjust the output current by control the duty of external PWM signal.
The minimum setup time of SD42511 PWM dimming is less than 20
μS, and the maximum PWM dimming ratio
is up to 500:1. When high dimming ratio is needed, the dimming frequency is recommended 500Hz below; or
else the dimming frequency can be up to 2 KHz. When PWM pin is low, output is shutdown. In normal station,
LED pin holds above 2V, and if the LED or other components have electric leakage which makes the LED pin is
low and caused change on PWM dimming, we recommend to increase the output capacitor, then the LED level
will not be too low when shutdown to maintain the normal PWM dimming.
2.
Output Current Setting
The output current is determined by the sampling resistor and setting voltage. The sampling voltage of VFB-
VLED is 88mV, and adjust the output current by adjusting the sampling resistor Rs (refer to Typical Application
Circuit).
S
LED
FB
OUT
R
V
V
I
=
3.
Bootstrap Circuit
SD42511 has Bootstrap circuit, which provides grid drive voltage to power MOSFET; the chip has diode to
charge the bootstrap capacitor by 5V standard voltage.
4.
Current Limiting Function
SD42511 has internal current limiting function, and the voltage on COMP is clamped at about 2.2V, the output
current of the power MOSFET is limited at about 1.6A by current comparator.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
REV:1.3
2008.11.19
Http://www.silan.com.cn
Page 4 of 10


Numéro de pièce similaire - SD42511

FabricantNo de pièceFiches techniqueDescription
logo
Silan Microelectronics ...
SD42509 SILAN-SD42509 Datasheet
606Kb / 7P
   1A WHITE LED DRIVER
SD42524 SILAN-SD42524 Datasheet
693Kb / 11P
   1A High Power LED Driver with 6~36V Input
More results

Description similaire - SD42511

FabricantNo de pièceFiches techniqueDescription
logo
Renesas Technology Corp
ISL97634 RENESAS-ISL97634 Datasheet
875Kb / 12P
   White LED Driver with Wide PWM Dimming Range
logo
Intersil Corporation
ISL97634 INTERSIL-ISL97634_08 Datasheet
460Kb / 10P
   White LED Driver with Wide PWM Dimming Range
ISL97634IRT14Z-T INTERSIL-ISL97634IRT14Z-T Datasheet
584Kb / 12P
   White LED Driver with Wide PWM Dimming Range
August 27, 2013
ISL97634 INTERSIL-ISL97634 Datasheet
471Kb / 10P
   White LED Driver with Wide PWM Dimming Range
logo
Maxic Technology Corpor...
MT7261 MAXIC-MT7261 Datasheet
167Kb / 1P
   Boost White LED Driver With High Frequency PWM Dimming
logo
Lowpower Semiconductor ...
LP3350 POWER-LP3350 Datasheet
324Kb / 7P
   LED Driver with PWM Dimming Control
logo
Princeton Technology Co...
PT6989 PTC-PT6989 Datasheet
279Kb / 4P
   BUCK LED DRIVER WITH PWM DIMMING
logo
Intersil Corporation
ISL97632 INTERSIL-ISL97632_07 Datasheet
184Kb / 9P
   White LED Driver with Digital Dimming
ISL97632 INTERSIL-ISL97632_08 Datasheet
175Kb / 9P
   White LED Driver with Digital Dimming
logo
ETA SOLUTIONS CO. LIMIT...
ETA1168 ETA-ETA1168 Datasheet
219Kb / 1P
   40V Step-Up Regulator for White LED Driver with PWM Dimming
More results


Html Pages

1 2 3 4 5 6 7 8 9


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
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