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MIC3263 Datasheet(PDF) 6 Page - Micrel Semiconductor

Part # MIC3263
Description  Six-Channel WLED Driver for Backlighting Applications with Flicker-Free Dimming
PDF  32 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC3263 Datasheet(HTML) 6 Page - Micrel Semiconductor

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Micrel, Inc.
MIC3263
January 2010
6
M9999-012110
IN
22
–40°C≤ TA ≤ +
ted.
Symbol
Parameter
Min
Typ
Max
Units
Electrical Characteristics(4) (Continued)
V = 12V; L =
μH, COUT =10μF,TA = 25°C, BOLD values indicate
Condition
125°C, unless no
FDIMA
ming F quency
FDIM = 100Hz to 2kHz; MODE
FDIM = 1.6kHz to 20kHz; MOD
DD
20
0
0
+20
+20
%
PWM Dim
re
Accuracy
= 0
E = V
−20
−
FDRC
DRC Input Range
0.1
40
kHz
Turn on
1.3
VPWM
DRC Pin Threshol
Turn off
0.4
V
ds
Turn on
1.3
VEN
EN Pin Thresholds
Turn off
0.4
V
I
re
40
60
μA
EN
Enable Pin Cur nt
Boost Converter
DMAX
ximum Duty C
90
%
Ma
ycle
ISW
ent Li
to 20V, Guaranteed b
esi
.6
2.4
A
Switch Curr
mit
VIN = 6V
y D
gn
1
VSW
witch VCE
IN = 12V, ISW = 1.0A
0.3
V
Equivalent S
(ON)
V
I
ge C
40V
0.01
20
μA
SW
Switch Leaka
urrent
VIN = 0V, VIN =
N
Efficiency
VIN = 12V, Load = 6 Channels of 8 LEDs at 20mA
with 3.6V per LED, Frequency
90
%
= 400kHz
FSW
Oscillator Frequency
Range
Frequency Setting Range
0.4
1.2
1.8
MHz
fSW
Oscillator Frequency
RFSW = 160kΩ
0.96
1.2
1.44
MHz
VOVP
Overvoltage Protection
Comparators OVP Pin to 2.36V
2.36
V
Temperature Rising
160
°C
TSD
Thermal Shutdown
Hysteresis
20



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