LM3431_08 Datasheet, PDF (4/24 Pages) National Semiconductor (TI) – 3-Channel Constant Current LED Driver with Integrated Boost Controller

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Voltages from the indicated
pins to SGND:
VIN
EN
DIM
MODE/F
REFIN
THM
DLY
SNSx
NDRVx
CFB
SC
AFB
-0.3V to 37V
-0.3V to 10V
-0.3V to 7V
-0.3V to 7V
-0.3V to 7V
-0.3V to 7V
-0.3V to 7V
-0.3V to 7V
-0.3V to 7V
-0.3V to 7V
-0.3V to 40V
-0.3V to 7V
CS
VCC
Storage Temperature
Soldering Dwell Time, Temp.
  Infrared
  Vapor Phase
ESD Rating (Note 2)
Human Body Model
-0.3V to 7V
-0.3V to 7V
-65°C to +150°C
20sec, 240°C
75sec, 219°C
2 kV
Operating Ratings (Note 1)
VIN
Junction Temp. Range
Thermal Resistance (θ_JA)
(Note 3)
TSSOP-28 (0.5W)
Power Dissipation (Note 4)
TSSOP-28
4.5V to 36V
-40°C to +125°C
32°C/W
3.1W
Electrical Characteristics Specifications in standard type are for TJ = 25°C only, and limits in boldface type
apply over the junction temperature (TJ) range of -40°C to +125°C. Unless otherwise stated, V_IN = 12V. Minimum and Maximum
limits are guaranteed 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. (Note 5)
Symbol
Parameter
System
I_Q
I_{Q_SB}
I_{Q_SD}
V_CC
VCC_ILIM
UVLO
Operating VIN Current (Note 6)
Standby mode VIN current
Shutdown mode VIN Current
VCC voltage
VCC current limit
UVLO threshold
hysteresis
V_{EN_ST}
V_EN
Enable pin Standby threshold
Enable pin On threshold
hysteresis
Linear Current Controller
V_REF
I_REFIN
ΔV_REF / ΔV_IN
V_NDRV
I_{NDRV_SK}
I_{NDRV_SC}
I_SNS
V_OS
V_OS
V_{OS_DELTA}
Reference Voltage
REFIN input bias current
Line regulation
NDRVx drive voltage capability
NDRVx drive sink current
NDRVx drive source current
SNSx input bias current
SNSx amp offset voltage
SNSx amp offset voltage
Ch. To Ch. offset voltage mismatch
(Note 7)
V_{OS_DELTA}
Ch. To Ch. offset voltage mismatch
(Note 7)
V_{OS_DELTA}
Ch. To Ch. offset voltage mismatch
(Note 7)
V_{OS_DELTA}
Ch. To Ch. offset voltage mismatch
(Note 7)
Conditions
DIM = 5V
EN = 1V
EN = 0V, Vin = 36V
Iload = 25 mA, Vin = 5.5 to 36V
VIN rising, measured at VCC
EN rising
EN rising
IREF < 300 µA
REFIN = 300 mV
5.5V < VIN < 36V
INDRVx = 5 mA
NDRV_X = 0.9V
NDRV_X = 0.9V
SNSx = 300 mV
REFIN = 300 mV (LM3431)
REFIN = 300 mV (LM3431A)
REFIN = 300 mV, 25°C (LM3431)
REFIN = 300 mV, -40°C to +125°C
(LM3431)
REFIN = 300 mV, 25°C (LM3431A)
REFIN = 300 mV, -40°C to +125°C
(LM3431A)
Min Typ Max Units
4.0 4.85 mA
3.7
mA
15 23 uA
4.80 5 5.24 V
72
mA
4.36 4.50 V
0.28
V
0.75
V
1.185 1.230 1.275 V
115 165 mV
2.45 2.5 2.55 V
14 80 nA
0.0001
%/V
3.7
V
4
6
8 mA
10 15 20 mA
20 30 µA
-5
+5 mV
-3
+3 mV
5.5 mV
6 mV
3.5 mV
4 mV
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