LX1745 Просмотр технического описания (PDF) - Microsemi Corporation
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LX1745 Datasheet PDF : 16 Pages
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INTEGRATED PRODUCTS
LX1745
Triple Output Boost – LED Driver / LCD Bias
PRODUCTION DATASHEET
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ TA ≤ 70°C except where
otherwise noted and the following test conditions: VIN = 3V, LSHDN = VIN, SHDN1 = VIN, SHDN2 = VIN
Parameter
` LED DRIVER
LFB Threshold Voltage
LFB Input Bias Current
BRT Input Voltage Range
BRT Input Bias Current
LED Driver Shutdown Input
Bias Current
Current Sense Bias Current
Switch Peak Current
DRV Sink/Source Current
DRV On-Resistance
Maximum Switch On-Time
Minimum Switch Off-Time
OVP Threshold Voltage
Reference Voltage
` LCD BIAS
Output Voltage Range
FBx Threshold Voltage
FBx Input Current
LCD Bias Shutdown Input Bias
Current
Peak Inductor Current
Internal NFET On-resistance
Switch Pin Leakage Current
Switch On-Time
Switch Off-Time
ADJx Input Voltage Range
ADJx Input Bias Current
` ENTIRE REGULATOR
Operating Voltage
Minimum Start-up Voltage
Start-up Voltage Temperature
Coefficient
Shutdown High Input Voltage
Shutdown Low Input Voltage
Quiescent Current
Symbol
Test Conditions
VLFB
ILFB
VBRT
IBRT
I SHDN1
ICS
IPK
RDRV(ON)
tON
tOFF
VOVP
VREF
VBRT = 100mV
VBRT = 20mV
VLFB = 100mV
BRT = 100mv
0.0V ≤ SHDN1 ≤ VIN
RCS = 0kΩ
RCS = 2kΩ
VIN = 5V, VDRV = 3V
VCC = 5V
VFB = 1V
VFB = 1V
VOUT
VFB
IFB
I SHDNx
ILIM
RDS(ON)
ILEAK
tON
tOFF
VADJx
IADJx
VFB = 1.4V
SHDNx = GND
TA = +25°C
ISW = 10mA, TA = +25°C, VIN = 5V
VSW = 25V
VFB = 1V
VFB = 1V
VIN
κ
V SHDNx
V SHDNx
IQ
Recommended Operating Range
TA = +25°C
VIN = 2V
VIN = 2V
VFBx = 1.4V, VLFB > VBRT – 0.1V
VFBx = 1.4V, VLFB > VBRT – 0.1V, VLSHDN <
0.4V
VFBx = 1.4V, VLFB > VBRT – 0.1V, VSHDN1 <
0.4V
VFBx = 1.4V, VLFB > VBRT – 0.1V, VSHDN2 <
0.4V
V SHDN1 < 0.4V, VSHDN2 < 0.4V, VLSHDN <
0.4V
LX1745
Units
Min Typ Max
85
5
100
20
115
35
mV
-100
100 nA
0
VIN V
60 nA
-100
100 nA
4
µA
170
210
mA
85 100
mA
12
15
Ω
∞
µS
200 300 410 nS
1.15 1.21 1.26
1.186 1.21 1.234
V
25
V
1.166 1.190 1.214 V
200 nA
100 nA
330
mA
1.1
Ω
1.0 µA
∞
µs
150
400 ns
0.9
1.5
V
0.3 1.0 µA
1.6
6.0
V
1.6
V
-2
mV/°C
1.6
V
0.4
V
200 320
0.35 1
140 220 µA
80 120
0.35 1
Copyright 2000
Rev. 1.1a, 2004-02-06
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
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