Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

W_SERIES Arkusz danych(PDF) 5 Page - Copal Electronics

Numer części W_SERIES
Szczegółowy opis  WHITE LED DRIVERS
Download  7 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  COPAL [Copal Electronics]
Strona internetowa  http://www.nidec-copal-electronics.com/e
Logo COPAL - Copal Electronics

W_SERIES Arkusz danych(HTML) 5 Page - Copal Electronics

  W_SERIES Datasheet HTML 1Page - Copal Electronics W_SERIES Datasheet HTML 2Page - Copal Electronics W_SERIES Datasheet HTML 3Page - Copal Electronics W_SERIES Datasheet HTML 4Page - Copal Electronics W_SERIES Datasheet HTML 5Page - Copal Electronics W_SERIES Datasheet HTML 6Page - Copal Electronics W_SERIES Datasheet HTML 7Page - Copal Electronics  
Zoom Inzoom in Zoom Outzoom out
 5 / 7 page
background image
BASIC CIRCUITRY METHOD AND FEATURES
WHITE LED DRIVERS
Designed for driving LEDs in series configuration
High output voltage, high efficiency (over 80%)
This will be explained by using W-52 as an example.
It is composed of a PWM modulator for activating switch
transistor SW and a oscillator which are inside the IC, as
well as current sensor circuitry Current Control and error
amplifier for detecting the current flowing through the LED
and diode Over Voltage Protection for guarding against
excessive voltage.
It operates by setting the LED current (5mA to 40mA) to
225 times the current flowing through the RSET pin. An error
signal travels to the PWM modulator so that the current
flowing through the LED connected to the output equalizes
with the set value, and the switching circuitry, comprised of
an external inductor and switch transistor, varies within an
ON/OFF range and regulates the (PWM) output current in
order to provide a constant amount of current. In irregular
circumstances, such as when the output ter minal is open,
a diode guarding against excessive voltage will prevent the
voltage from rising and protect the circuitry.
FEATURES
Circuitry structure and operation
1. Boost regulator Type [using coil]
Vin
C1
L1
1
6
Vin
5
SHDN
SW
D1
C2
3
LED
SOT23 Pin Numbres
Figure 1: W-52 Block Diagram
ILED
ILED=
225xIs
Over Voltage
Protection
(22V)
W-52
1.2MHz
Oscillator
PWM
& Logic
Current
Control
100 mV
225x
GND
2
ISRSET
RSET
Current
Sense
Amp
+
+


Podobny numer części - W_SERIES

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Ohmite Mfg. Co.
W-SERIES OHMITE-W-SERIES Datasheet
333Kb / 1P
   The unique design (patent pending) of the W Series
More results

Podobny opis - W_SERIES

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Maxim Integrated Produc...
MAX1984 MAXIM-MAX1984 Datasheet
333Kb / 17P
   Ultra-High-Efficiency White LED Drivers
19-2761; Rev 0; 1/03
logo
Fairchild Semiconductor
FAN5611 FAIRCHILD-FAN5611_06 Datasheet
702Kb / 14P
   Low-Dropout LED Drivers for White, Blue, or any Color LED
FAN5611 FAIRCHILD-FAN5611 Datasheet
168Kb / 12P
   Low-Dropout LED Drivers for White, Blue or any Color LED
logo
Advanced Analogic Techn...
AAT1235 ANALOGICTECH-AAT1235 Datasheet
963Kb / 21P
   High Efficiency White LED Drivers for Backlight and Keypad
logo
Advanced Analog Technol...
AAT1236 AAT-AAT1236 Datasheet
1,016Kb / 24P
   High Efficiency White LED Drivers for Backlight and Keypad
logo
XP Power Limited
DLE45 XPPOWER-DLE45 Datasheet
266Kb / 5P
   LED Drivers
DLE25 XPPOWER-DLE25 Datasheet
482Kb / 5P
   LED Drivers
logo
Allegro MicroSystems
LC5200 ALLEGRO-LC5200 Datasheet
601Kb / 15P
   LED Drivers
logo
List of Unclassifed Man...
TSV-300S024ST ETC2-TSV-300S024ST Datasheet
594Kb / 2P
   LED Drivers
VLED40W-012 ETC2-VLED40W-012 Datasheet
683Kb / 3P
   LED Drivers
More results


Html Pages

1 2 3 4 5 6 7


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
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