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LX1996 Datasheet(PDF) 5 Page - Microsemi Corporation

Part # LX1996
Description  Multi-string LED Back-light Controller
PDF  22 Pages
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Manufacturer  MICROSEMI [Microsemi Corporation]
Direct Link  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

LX1996 Datasheet(HTML) 5 Page - Microsemi Corporation

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LX1996
PRODUCTION DATASHEET
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
Copyright
© 2007
Rev. 1.0, 2007-12-14
Multi-string LED Back-light Controller
TM
®
ELECTRICAL CHA RACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature of -400C < Temp <850C, and the
following test conditions: VIN=12V, VOT = 3V, EN = VIN , RPRG= 4.99 kΩ, L=6.8μH, RSRC= 0.075Ω, COUTPUT = 4.7uF
LX1996
Parameter
Symbol
Test Conditions / Comment
Min
Typ
Max
Units
Power Supply
Input Voltage
VIN
6
12
28
V
Quiescent current
IIN ON
EN ≥2.4V, output not switching, VCS = 0.8V
2.5
mA
Sleep Current
IIN sleep
EN ≤ 0.4V
6
15
µA
Logic
DSEL1 Input High Voltage
VDSEL1-H
2.4
V
DSEL1 Input Low Voltage
V DSEL1-L
0.8
V
DSEL1 input current High
I DSEL1_H
DSEL1 = 2.4V
4
10
µA
DSEL1 input current Low
I DSEL1_L
DSEL1 = 0.8V
-10
-4
µA
DSEL1 Open Voltage
1.2
1.6
2.0
V
DSEL2 Input High Voltage
2.4
V
DSEL2 Input Low Voltage
0.8
V
DSEL2 Pull-down Resistor
600
kΩ
EN Input High Voltage
2.4
V
EN Input Low Voltage
0.8
V
EN input current
IEN_H
12V ≥ EN ≥ 2.4V
4.0
10
μA
EN input current
IEN_L
EN < 0.4V
0.4
1
μA
PWM Input High Voltage
VPWM-H
2.4
V
PWM Input Low Voltage
VPWM-L
0.8
V
PWM Pull-down Resistor
600
kΩ
DIMMING
DI Input Bias Current
VDI =0.2 to 2.0V, Analog dimming
1
μA
Maximum PRG voltage
VTH_DI_H
VDI =2.0V, Analog dimming
1.83
2.0
2.17
V
Minimum PRG voltage
VTH_DI_L
VDI =0.2V, Analog dimming
0.2
V
Direct Digital Dimming
Frequency
FPWM
100
25000
Hz
Direct Digital Dimming Min.
PWM Pulse Width (Note 2)
FPWM
4
us
RT Reference Voltage
RT = 100kΩ
2
V
CT = 200pF, RT = 100kΩ
25
kHz
Internal PWM Frequency
FINTPWM
CT =.047μF, RT = 100kΩ
100
Hz
Sync. freq. Capture Range
Percent of Internal PWM Frequency
-25
+25
%
Minimum PWM Input Pulse
Width
For synchronization
400
ns
Device Protection
OVP Threshold Voltage
VTH_OVP
1.9
2.0
2.1
V



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