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LM3466 Datenblatt(PDF) 3 Page - Texas Instruments

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Teilenummer LM3466
Bauteilbeschribung  Multi-String LED Current Balancer for Use with Constant-Current Power Supplies
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Hersteller  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

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LM3466
www.ti.com
SNOSB96F – JUNE 2011 – REVISED NOVEMBER 2013
ELECTRICAL CHARACTERISTICS
–40°C
≤ TJ ≤ 125°C, VIN = 48 V (unless otherwise stated)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VIN pin under-voltage lockout (UVLO)
VIN-UVLO-UPPER
Input voltage increasing
4.06
4.78
5.30
V
upper threshold
VIN-UVLO-HYS
VIN pin UVLO hysteresis
Input voltage decreasing, TA = 25°C
0.52
V
IIN
Operating current to the VIN pin
550
640
µA
VEQ = 200 mV, TA = 25°C
197.1
200
201.0
VSEN
SEN pin voltage regulation
mV
VEQ = 200 mV
195.6
200
201.5
ISEN
SEN pin bias current out
VSEN = 0 V
9.35
10.29
11.23
µA
ILED-OFF
ILED pin off current
VILED = 70 V
0.1
0.6
µA
Integrated power MOSFET on-
RDS(on)
IILED = 300 mA
0.5
1.2
resistance
VSRC-OPEN
SRC pin open circuit threshold
VSEN = VSRC, VCOMM = 0 V
25
31
37
mV
ILIMIT
Current limit
VSEN = VSRC = 0 V, VILED = 3 V
1.75
2.06
2.35
A
COMMILOW
COMM pin pull-low current
VCOMM = 5 V
34
54
µA
COMM pin to ground through a 10-k
COMMVHIGH
COMM pin pull-high voltage
6.0
V
resistor
TSD
Thermal shutdown
150
°C
Connection Diagrams
Figure 1. DDA (SO PowerPAD) Package, 8 Pins
Figure 2. NEC (TO-220) Package, 7 Pins
(Top View)
(Top View)
PIN DESCRIPTIONS
PINS
NAME
I/O
DESCRIPTION
DDA
NEC
Open-drain status output. Indicates the status of the LM3466 including startup, LED string
COMM
2
6
O
active/inactive, thermal shutdown.
GND
5
4
Ground. Connects to ground.
Current regulator input. Connects to the drain of the integrated power MOSFET. Connects this pin to
ILED
1
5
I
the cathode of an LED string. Connects a capacitor from this pin to ground to minimize noise if the
connecting cable to the LED string is long.
SEN
6
2
I
Current sense input. Senses the voltage of an external current sensing resistor.
7
Source of power MOSFET. Connects to the source of the integrated power MOSFET. Connect this
SRC
3
O
pin to an external current sensing resistor.
8
Control voltage. Connects to the VEQ pin of other LM3466 with a 51-
Ω resistor in series with a 1-µF
VEQ
4
1
O
capacitor to ground.
Input voltage supply. Connects to voltage supply from 6 V to 70 V. Connects a 10-nF capacitor from
VIN
3
7
I
this pin to ground for decoupling.
Thermal Pad
Thermal connection pad. Connects to a ground plane.
Copyright © 2011–2013, Texas Instruments Incorporated
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