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LM3414MR Fiches technique(PDF) 5 Page - Texas Instruments

No de pièce LM3414MR
Description  Common Anode-Capable Constant Current Buck LED Driver
Download  30 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI1 - Texas Instruments

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LM3414, LM3414HV
www.ti.com
SNVS678F – JUNE 2010 – REVISED NOVEMBER 2015
6.4 Thermal Information
LM3414, LM3414HV
THERMAL METRIC(1)
NGQ (WSON)
DDA (SOIC-8)
UNIT
8 PINS
8 PINS
RθJA
Junction-to-ambient thermal resistance
47.7
50.5
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
43.1
55.7
°C/W
RθJB
Junction-to-board thermal resistance
22.3
28.6
°C/W
ψJT
Junction-to-top characterization parameter
0.4
9.5
°C/W
ψJB
Junction-to-board characterization parameter
22.5
28.5
°C/W
RθJC(bot)
Junction-to-case (bottom) thermal resistance
4
3.2
°C/W
(1)
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report, SPRA953.
6.5 Electrical Characteristics
MIN and MAX limits apply for TJ = –40°C to 125°C unless specified otherwise. VIN = 24 V unless otherwise indicated.
PARAMETER
TEST CONDITIONS
MIN(1)
TYP(2)
MAX(1)
UNIT
SYSTEM PARAMETERS - LM3414
4.5 V
≤ Vin ≤ 42 V
IIN-DIM-HIGH
Operating Current
RIADJ = 3.125 kΩ
2.2
3.2
3.5
mA
VDIM = High
4.5 V
≤ Vin ≤ 42 V
IIN-DIM-LOW
Standby Current
RIADJ = 3.125 kΩ
0.8
1.15
1.4
mA
VDIM = Low
Main Switch Turned OFF
ILX-OFF
LX Pin Current
6
µA
VLX = VIN = 42 V
SYSTEM PARAMETERS - LM3414HV
4.5 V
≤ Vin ≤ 65 V
IIN-DIM-HIGH
Operating Current
RIADJ = 3.125 kΩ
2.2
3.3
3.6
mA
VDIM = High
4.5 V
≤ Vin ≤ 65 V
IIN-DIM-LOW
Standby Current
RIADJ = 3.125 kΩ
0.8
1.2
1.45
mA
VDIM = Low
Main Switch Turned OFF
ILX-OFF
LX Pin Current
6.5
µA
VLX = VIN= 65 V
SYSTEM PARAMETERS - LM3414/3414HV
RIADJ = 3.125 kΩ
0.97
1
1.03
A
TA = 25°C
ILED
Average LED Current
RIADJ = 3.125 kΩ
0.95
1
1.05
A
TA = –40°C to 125°C
VCC-UVLO
Vcc UVLO Threshold
VCC Decreasing, TA = 25°C
3.6
3.75
3.9
V
VCC-UVLO-HYS
Vcc UVLO Hysteresis
300
mV
VIADJ
IADJ Pin voltage
1.23
1.255
1.280
V
VDIM
DIM Pin Threshold
VDIM Increasing
1
1.2
V
VDIM-HYS
DIM Pin Hysteresis
100
mV
fSW
Switching frequency
250
500
1000
kHz
fSW-TOL
Switching frequency tolerance
RFS = 40 kΩ
420
500
580
kHz
tON-MIN
Minimum on-time
400
ns
(1)
All limits specified at room temperature (TYP) and at temperature extremes (MIN/MAX). All room temperature limits are 100%
production tested. All limits at temperature extremes are specified through correlation using standard Statistical Quality Control (SQC)
methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2)
Typical specification represent the most likely parametric norm at 25°C operation.
Copyright © 2010–2015, Texas Instruments Incorporated
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