LM3424 Datasheet, PDF (3/50 Pages) National Semiconductor (TI) – Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs

Absolute Maximum Ratings (Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
V_IN, EN, nDIM
-0.3V to 76.0V
-1 mA continuous
OVP, HSP, HSN
-0.3V to 76.0V
-100 µA continuous
IS
-0.3V to 76.0V
-2V for 100 ns
-1 mA continuous
V_CC
V_S, TREF, TSENSE, TGAIN,
COMP, CSH, RT, SLOPE, SS
-0.3V to 8.0V
-0.3V to 6.0V
SS
-30 µA to +30 µA
continuous
GATE, DDRV
-0.3V to V_CC
-2.5V for 100 ns
V_CC+2.5V for 100 ns
-1 mA to +1 mA continuous
GND
Junction Temperature
Storage Temperature Range
Maximum Lead Temperature
(Reflow and Solder)
Continuous Power Dissipation
ESD Susceptibility
Human Body Model
-0.3V to 0.3V
-2.5V to 2.5V for 100 ns
150°C
−65°C to +150°C
260°C
Internally Limited
2 kV
Operating Conditions (Notes 1, 2)
Operating Junction
Temperature Range
Input Voltage V_IN
−40°C to +125°C
4.5V to 75V
Electrical Characteristics (Note 2)
Specifications in standard type face are for T_J = 25°C and those with boldface type apply over the full Operating Temperature
Range ( T_J = −40°C to +125°C). Minimum and Maximum limits 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 condition applies: V_IN = +14V.
Symbol
Parameter
Conditions
Min
Typ
Max
(Note 7) (Note 8) (Note 7)
Units
STARTUP REGULATOR (V_CC)
V_CC-REG
V_CC Regulation
I_CC-LIM
V_CC Current Limit
I_Q
Quiescent Current
I_SD
Shutdown Current
V_CC-UVLO
V_CC UVLO Threshold
V_CC-HYS
ENABLE (EN)
V_CC UVLO Hysteresis
I_CC = 0 mA
V_CC = 0V
EN = 3.0V, Static
EN = 0V
V_CC Increasing
V_CC Decreasing
6.30
6.90
7.35
V
20
25
mA
2.0
3.0
0.1
1.0
µA
4.17
4.50
3.70
4.08
V
0.1
V_EN-ST
EN Startup Threshold
EN Increasing
EN decreasing
1.75
2.40
0.80
1.63
V
V_EN-HYS
EN Startup Hysteresis
R_EN
EN Pull-down Resistance
OVER-VOLTAGE PROTECTION (OVP)
0.1
0.45
0.82
1.30
MΩ
V_TH-OVP
I_HYS-OVP
OVP OVLO Threshold
OVP Hysteresis Source
Current
OVP Increasing
OVP Active (high)
1.185
1.240
1.285
V
13
20
27
µA
ERROR AMPLIFIER
V_CSH
CSH Reference Voltage
Error Amplifier Input Bias
Current
With Respect to GND
1.210
1.235
1.260
V
-0.6
0
0.6
µA
COMP Sink / Source Current
17
26
35
Transconductance
100
µA/V
Linear Input Range
(Note 9)
±125
mV
Transconductance
Bandwidth
-6dB Unloaded Response (Note 9)
1.0
MHz
3
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