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LM3424 Arkusz danych(PDF) 7 Page - Texas Instruments

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Numer części LM3424
Szczegółowy opis  Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
Logo TI1 - Texas Instruments

LM3424 Arkusz danych(HTML) 7 Page - Texas Instruments

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LM3424
www.ti.com
SNVS603B – AUGUST 2009 – REVISED OCTOBER 2009
Electrical Characteristics
(1) (continued)
Specifications in standard type face are for TJ = 25°C and those with boldface type apply over the full Operating
Temperature Range ( TJ = −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 TJ = +25°C, and are provided for reference
purposes only. Unless otherwise stated the following condition applies: VIN = +14V.
Min
Typ
Max
Symbol
Parameter
Conditions
Units
(2)
(3)
(2)
VLIM
Current Limit Threshold
215
245
275
mV
VLIM Delay to Output
35
75
ns
tON-MIN
Leading Edge Blanking
140
240
340
Time
HIGH SIDE TRANSCONDUCTANCE AMPLIFIER
Input Bias Current
10
µA
Transconductance
20
mA/V
Input Offset Current
-1.5
0
1.5
µA
Input Offset Voltage
-5
0
5
mV
Transconductance
ICSH = 100 µA
(4)
500
kHz
Bandwidth
GATE DRIVER (GATE)
RSRC-GATE
GATE Sourcing
GATE = High
2.0
6.0
Resistance
RSNK-GATE
GATE Sinking Resistance
GATE = Low
1.3
4.5
UNDER-VOLTAGE LOCKOUT and DIM INPUT (nDIM)
VTH-nDIM
nDIM / UVLO Threshold
1.185
1.240
1.285
V
IHYS-nDIM
nDIM Hysteresis Current
13
20
27
µA
DIM DRIVER (DDRV)
RSRC-DDRV
DDRV Sourcing
DDRV = High
13.5
30.0
Resistance
RSNK-DDRV
DDRV Sinking Resistance
DDRV = Low
3.5
10.0
nDIM rising to DDRV
700
rising
ns
nDIM rising to DDRV
360
falling
SOFT-START (SS)
ISS
Soft-start current
10
µA
THERMAL CONTROL
VS
VS Voltage
IVS = 0A
2.40
2.45
2.50
V
IVS = 1 mA
TREF input bias current
VTREF = 1.5V
0.1
VTSENSE = 1.5V
TSENSE Input Bias
VTREF = 1.5V
0.1
Current
VTSENSE = 1.5V
ITGAIN-MAX
TGAIN Maximum
VTGAIN = 2V
200
600
Sourcing Current
µA
ITF
CSH Current with High-
RTGAIN =
VTREF = 1.5V
100
side Amplifier Disabled
10 k
VTSENSE = 0.5V
VTREF = 1.5V
10
VTSENSE = 1.4V
VTREF = 1.5V
2
VTSENSE = 1.5V
THERMAL SHUTDOWN
Copyright © 2009, Texas Instruments Incorporated
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