Microchip MIC3263 Manual


Læs nedenfor 📖 manual på dansk for Microchip MIC3263 (32 sider) i kategorien Ikke kategoriseret. Denne guide var nyttig for 3 personer og blev bedømt med 4.5 stjerner i gennemsnit af 2 brugere

Side 1/32
MIC3263
Six-Channel WLED Driver for
Backlighting Applications with
Flicker-Free Dimming
MLF is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 http://www.micrel.com
January 2010 M9999-012110
can be set to a
ed to 16
frequency from 400 KHz to 1.8 MHz to a
sizes. The 6V to 40V wide input voltage
allows direct operation from 6V or high
batteries commonly found in notebook compute
range of − °40 C to + °125 C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com
General Description
The MIC3263 is a high-efficiency Pulse Width
(PWM) boost switching regulator that is op
constant-current WLED d
Modulation
timized for
lications. river backlighting ap
The MIC3263 drives six channels of up to ten
channel. Each channel is matched in current to
for constant brightness across the screen a
programmed from 15mA to 30mA.
The MIC3263 provides a very flexible dimm
scheme with better accuracy and noise imm
dimming frequency
p
WLEDs per
within ±3%
nd can be
ing control
unity. The
ny value between
100Hz and 20kHz by an external resistor. T
ratio is determined by the duty cycle of a dim
control input signal and can be set to one of 16
he dimming
ming ratio
levels with
a minimum ratio of 1%.The LED dimming curre
an external resistor to allow programming of
between 15mA and 30mA.
The dimming ratio of the MIC3263 is fix
nt is set by
LED current
log levels
to better match the sensitivity of the human e
the dimming levels has hysteresis to avo
between levels and a
ye. Each of
id skipping
llow for high noise immun
The MIC3263 has a programmable PW
ity.
M switching
llow small inductor
range of MIC3263
cell count Li-Ion
r s.
The MIC3263 is available in a low-profile 24-pin 4mm x
4mm MLF® package and has a junction temperature
.
nge
white LEDs
from 15mA to 30mA
ith open and short LEDs
og levels sets the dimming ratio
the jitter from the dimming
control input signal and eliminates dimming flicker
control
rrent matching ±3%
ED current setting ±2%
ing frequency from 400kHz to
High efficiency up to 90%
Low (<40μA) shutdown current over temperature
rature protection
mmable over-voltage protection
° + °C to 125 C junction temperature range
ilable in 24-pin 4mm x 4mm MLF® package
ons
White LED driver for backlighting
LCD Panels and Monitors
Multimedia players
Navigation equipment
Gaming systems
Video poker
Slot machines
_________________________________________________________________________________________________________________________
Features
6V to 40V wide input voltage ra
Drives 6 channels of up to 10
Programmable WLED current
Highly reliable operation w
Accurate 16 dimming l
from 1% to 100%
Flicker-Free Dimming filters
Allows external dimming
LED channel cu Accurate
Accurate initial L
Programmable switch
1.8MHz
Over tempe
Progra
• − 40
Ava
Applicati
Notebooks


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: MIC3263

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