LM3492HC Datasheet, PDF (4/17 Pages) Texas Instruments – Two-Channel Individual Dimmable LED Driver with Boost Converter and Fast Current Regulator

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the Texas Instruments Sales Office/
Distributors for availability and specifications.
VIN, RT, VOUT to GND
SW to GND
SW to GND (Transient)
ILIM to GND
FB to GND
COMM, DIM1, DIM2, to GND
−0.3V to 67V
−0.3V to 67V
−2V (<100 ns)
−0.3V to 1V
−0.3V to 5V
−0.3V to 6V
ESD Rating (Note 2)
Human Body Model
Storage Temperature Range
JunctionTemperature (T_J)
±2kV
−65°C to +150°C
150°C
Operating Ratings (Note 1)
Supply Voltage (VIN)
Operation Temperature Range (T_A)
Thermal Resistance (θ_JA) (Note 3)
4.5V to 65V
−40°C to +125°C
32.7°C/W
Electrical Characteristics Specification with standard type are for T_A = T_J = +25°C only; limits in boldface type
apply over the full Operating Junction Temperature (T_J) range. Minimum and Maximum are guaranteed through test, design or
statistical correlation. Typical values represent the most likely parametric norm at T_J = +25°C, and are provided for reference
purposes only. Unless otherwise stated the following conditions apply: V_IN = 12V.
Symbol
Parameter
Conditions
Min Typ Max Units
Start-Up Regulator, VCC
V_CC
V_CC-UVLO
VCC pin output voltage
VCC pin under-voltage lockout threshold
(UVLO)
C_VCC = 0.47 µF, no load
I_CC = 2 mA
V_CC increasing
4.7 5.5 6.3 V
4.7 5.5 6.3 V
3.56 3.78 4.00 V
V_CC-UVLO-HYS
I_IN
I_IN-SD
I_VCC
V_CC-VOUT
VCC pin UVLO hysteresis
V_CC decreasing
I_IN operating current
No switching, V_FB = 0V
I_IN operating current, Device shutdown V_EN = 0V
VCC pin current limit (Note 4)
V_CC = 0V
VCC pin output voltage when supplied by
VOUT
V_IN = Open, I_CC = 1 mA, V_OUT = 18V
310
mV
3.6 5.2 mA
30 95 µA
18 30
mA
3.5 4.1 4.7 V
Enable Input
V_EN
EN pin input threshold
V_EN-HYS
EN pin threshold hysteresis
I_EN-SHUT
Enable Pull-up Current at shutdown
I_EN-OPER
Enable Pull-up Current during operation
Current Regulator
V_EN rising
V_EN falling
V_EN = 0V
V_EN = 2V
1.55 1.63 1.71 V
194
mV
2
µA
40
µA
V_IREF
V_DHC50
V_DHC100
V_DHC200
V_DHC250
I_OUT50
I_OUT100
I_OUT200
I_OUT250
I_OUTOFF
V_IOUT50-MIN
V_IOUT100-MIN
V_IOUT200-MIN
IREF pin voltage
V_IOUT under DHC at I_OUT = 50 mA
V_IOUT under DHC at I_OUT = 100 mA
V_IOUT under DHC at I_OUT = 200 mA
V_IOUT under DHC at I_OUT = 250 mA
Current Output under DHC at V_IOUT =
V_DHC50
Current Output under DHC at V_IOUT =
V_DHC100
Current Output under DHC at V_IOUT =
V_DHC200
Current Output under DHC at V_IOUT =
V_DHC250
Leakage at Maximum Work Voltage
Minimum Work Voltage, 50 mA
Minimum Work Voltage, 100 mA
Minimum Work Voltage, 200 mA
V_IN = 4.5V to 65V
R_IREF = 25 kΩ
R_IREF = 12.5 kΩ
R_IREF = 6.25 kΩ
R_IREF = 5 kΩ
R_IREF = 25 kΩ, V_IOUT = V_DHC50
R_IREF = 25 kΩ, V_IOUT = V_DHC50
R_IREF = 12.5 kΩ, V_IOUT = V_DHC100
R_IREF = 12.5 kΩ, V_IOUT = V_DHC100
R_IREF = 6.25 kΩ, V_IOUT = V_DHC200
R_IREF = 6.25 kΩ, V_IOUT = V_DHC200
R_IREF = 5 kΩ, V_IOUT = V_DHC250
R_IREF = 5 kΩ, V_IOUT = V_DHC250
V_DIM = 0, V_IOUT = 65V
R_IREF = 25 kΩ, I_OUT = 0.98 x I_OUT50
R_IREF = 12.5 kΩ, I_OUT = 0.98 x I_OUT100
R_IREF = 6.25 kΩ, I_OUT = 0.98 x I_OUT200
1.231 1.256 1.281 V
0.160 0.225 0.290 V
0.38 0.48 0.58 V
0.81 0.99 1.17 V
0.81 1.21 1.44 V
47.5 50 52.5 mA
46.5 50 53.5 mA
97 100 103 mA
96 100 104 mA
194 200 206 mA
192 200 208 mA
241.3 250 258.8 mA
238 250 262 mA
5 µA
0.1 0.15 V
0.2 0.35 V
0.4 0.65 V
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