LM3431MHX National Semiconductor, LM3431MHX Datasheet - Page 5

• Manufacturer Part Number: LM3431MHX
• Description: 3-Channel Constant Current LED Driver with Integrated Boost Controller
• Manufacturer: National Semiconductor

Protection
Boost controller
ΔV
V
DIM
DIM
TH
V
V
V
V
T
V
I
I
Symbol
V
V
V
SC_SHORT
COMP_SC
COMP_SK
I
I
Vslope
I
CFB
CFB
T
ILIM
SC_OPEN
DLY_reset
MODE/F
DLY_SC
DLY_BLK
AFB_UVP
MODE_H
DLY_SK
AFB_max
I
MODE_L
V
D
EA
LEDOFF
V
SS_END
V
V
T
I
SS/SH
I
I
F
on_min
R
T
V
MODE/F
bw
THM
ILIM
CFB
I
THM
DIM
DLY
CFB
MAX
DIM
LG
DLY_R
SW
DLY_F
SD
RT
LG
gm
/ ΔV
gm
TC
IN
Parameter
SNSx amp bandwidth
LEDOFF voltage
DIM threshold
hysteresis
Minimum internal DIM pulse width
(Note 8)
DIM to NDRV delay time
DIM to NDRV delay time
MODE/F threshold
MODE/F source/sink current
MODE/F minimum voltage
MODE/F peak voltage
SC high threshold
SC open clamp voltage
DLY source current
DLY sink current
DLY threshold voltage
DLY reset threshold voltage
DLY blank time
THM threshold
THM hysteresis current
ILIM max source current
AFB overvoltage threshold
AFB undervoltage threshold
Thermal shutdown threshold
CFB voltage
CFB source current
CFB temperature coefficient
CFB Line regulation
SS/SH source current
SS/SH voltage
RT voltage
Switching Frequency
Minimum Switching Frequency
Maximum Switching Frequency
Minimum on time
Maximum duty cycle
ILIM amplifier transconductance
Slope compensation
COMP source current
COMP sink current
Error amplifier transconductance
Gate Drive On Resistance
Driver Output Current
Conditions
At unity gain
DIM low
MODE/F > 4V
DIM rising
DIM falling
For Digital Dimming control
Analog dimming mode
Analog dimming mode
LED short circuit fault, SC rising
LED open circuit fault, SC rising
DLY = 1.0V
DLY = 1.0V
DLY rising
DLY falling
DIM rising
THM = 1V
COMP = 2.0V
AFB falling
DIM high
DIM high
5.5V < VIN < 36V
At EN going high
At end of soft-start cycle
R
R
R
R
COMP to ILIM gain
Peak voltage per cycle
VCOMP = 1.2V, AFB = 0.5V
VCOMP =1.2V, AFB = 1.5V
CFB to COMP gain, DIM high
Source Current = 200 mA, VIN = 5.5V
Sink Current = 200 mA
Source, LG = 2.5V, VIN = 5.5V
Sink, LG = 2.5V
RT
RT
RT
RT
= 34.8 kΩ
= 34.8 kΩ
= 130 kΩ
= 22.6 kΩ
5
3.16
2.40
1.19
1.87
0.73
1.60
1.80
Min
651
180
900
5.7
39
31
35
13
80
0.001
1000
0.37
3.50
1.23
0.85
1.71
1.85
1.22
0.35
0.70
Typ
-2.6
100
350
160
700
200
170
155
150
230
1.9
0.8
0.4
3.8
2.5
1.8
2.8
1.6
9.6
2.0
6.4
2.2
90
40
57
40
50
19
85
85
75
2
5
6
www.national.com
1100
Max
3.87
3.16
1.27
2.22
0.98
1.82
1.90
749
220
230
2.3
6.2
73
46
65
24
mV/°C
Units
umho
umho
MHz
%/V
kHz
mV
mV
uA
µA
µA
µA
µA
µA
µA
µA
µA
µs
ns
ns
µs
°C
ns
%
Ω
Ω
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
A
A