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LM3492 データシート(PDF) 4 Page - Texas Instruments

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部品番号 LM3492
部品情報  Two-Channel Individual Dimmable LED Driver
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
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LM3492 データシート(HTML) 4 Page - Texas Instruments

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LM3492, LM3492Q
SNVS656C – SEPTEMBER 2010 – REVISED MAY 2013
www.ti.com
ELECTRICAL CHARACTERISTICS
Specification with standard type are for TA = TJ = +25°C only; limits in boldface type apply over the full Operating Junction
Temperature (TJ) range. Minimum and Maximum are ensured through test, design or statistical correlation. Typical values
represent the most likely parametric norm at TJ = +25°C, and are provided for reference purposes only. Unless otherwise
stated the following conditions apply: VIN = 12V.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Start-Up Regulator, VCC
VCC
VCC pin output voltage
CVCC = 0.47 µF, no load
4.7
5.5
6.3
V
ICC = 2 mA
4.7
5.5
6.3
V
VCC-UVLO
VCC pin under-voltage lockout threshold (UVLO)
VCC increasing
3.56
3.78
4.00
V
VCC-UVLO-HYS
VCC pin UVLO hysteresis
VCC decreasing
310
mV
IIN
IIN operating current
No switching, VFB = 0V
3.6
5.2
mA
IIN-SD
IIN operating current, Device shutdown
VEN = 0V
30
95
µA
IVCC
VCC pin current limit (1)
VCC = 0V
18
30
mA
VCC-VOUT
VCC pin output voltage when supplied by VOUT
VIN = Open, ICC = 1 mA, VOUT = 18V
3.5
4.1
4.7
V
Enable Input
VEN
EN pin input threshold
VEN rising
1.55
1.63
1.71
V
VEN-HYS
EN pin threshold hysteresis
VEN falling
194
mV
IEN-SHUT
Enable Pull-up Current at shutdown
VEN = 0V
2
µA
IEN-OPER
Enable Pull-up Current during operation
VEN = 2V
40
µA
Current Regulator
VIREF
IREF pin voltage
VIN = 4.5V to 65V
1.231
1.256
1.281
V
VDHC50
VIOUT under DHC at IOUT = 50 mA
RIREF = 25 kΩ
0.160
0.225
0.290
V
VDHC100
VIOUT under DHC at IOUT = 100 mA
RIREF = 12.5 kΩ
0.38
0.48
0.58
V
VDHC200
VIOUT under DHC at IOUT = 200 mA
RIREF = 6.25 kΩ
0.81
0.99
1.17
V
IOUT50
Current Output under DHC at VIOUT = VDHC50
RIREF = 25 kΩ, VIOUT = VDHC50
47.5
50
52.5
mA
RIREF = 25 kΩ, VIOUT = VDHC50
46.5
50
53.5
mA
IOUT100
Current Output under DHC at VIOUT = VDHC100
RIREF = 12.5 kΩ, VIOUT = VDHC100
97
100
103
mA
RIREF = 12.5 kΩ, VIOUT = VDHC100
96
100
104
mA
IOUT200
Current Output under DHC at VIOUT = VDHC200
RIREF = 6.25 kΩ, VIOUT = VDHC200
194
200
206
mA
RIREF = 6.25 kΩ, VIOUT = VDHC200
192
200
208
mA
IOUTOFF
Leakage at Maximum Work Voltage
VDIM = 0, VIOUT = 65V
5
µA
VIOUT50-MIN
Minimum Work Voltage, 50 mA
RIREF = 25 kΩ, IOUT = 0.98 x IOUT50
0.1
0.15
V
VIOUT100-MIN
Minimum Work Voltage, 100 mA
RIREF = 12.5 kΩ, IOUT = 0.98 x IOUT100
0.2
0.35
V
VIOUT200-MIN
Minimum Work Voltage, 200 mA
RIREF = 6.25 kΩ, IOUT = 0.98 x IOUT200
0.4
0.65
V
VDIM-HIGH
DIM Voltage HIGH
1.17
V
VDIM-LOW
DIM Voltage LOW
0.7
V
Boost Converter
ICDHC-SRC
CDHC pin source current
VCDHC = 1.6V, VFB = 3V, VIOUT = 0V,
60
µA
DIM = High
ICDHC-SINK
CDHC pin sink current
VCDHC = 1.6V, VFB = 3V, VIOUT = 3V,
56
µA
DIM = High
ICDHC-LEAKAGE
CDHC pin leakage current
DIM = Low, VCDHC = 2.6V
5
46
nA
ICL-MAX
Integrated MOSFET peak current limit threshold
3.3
3.9
4.5
A
ICL-HALF
Half integrated MOSFET peak current limit threshold RILIM = 11 kΩ
2.0
A
RDS(on)
Integrated MOSFET RDS(on)
ISW = 500 mA
0.19
0.43
VFBTH-PWRGD
Power-Good FB pin threshold
2.25
V
IFB
Feedback pin input current
VFB = 3V
1
µA
ton
ON timer pulse width
VIN = 12V, VOUT = 65V, RRT = 300 kΩ
1460
ns
VIN = 24V, VOUT = 32.5V, RRT = 300 kΩ
800
ns
VIN = 12V, VOUT = 65V, RRT = 100 kΩ
550
ns
VIN = 24V, VOUT = 32.5V, RRT = 100 kΩ
350
ns
ton-min-ILIM
ON timer minimum pulse width at current limit
145
ns
(1)
VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading.
4
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