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LT3590ESC8#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LT3590
1
3590f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
48V Buck Mode
LED Driver in SC70
and 2mm x 2mm DFN
The LT
®
3590 is a fi xed frequency buck mode converter
specifi cally designed to drive up to 10 LEDs in series from
a 48V DC source. Series connection of the LEDs provides
identical LED currents of up to 50mA, resulting in uniform
brightness and eliminating the need for ballast resistors.
A fi xed frequency, current mode architecture results in
stable operation over a wide range of input voltage and
output voltage.
The high switching frequency of 850kHz permits the use
of tiny, low profi le inductors and capacitors. A single pin
performs both shutdown and accurate LED dimming
control. The power switch, Schottky diode and control
circuitry are all contained inside a space saving SC70
package or 2mm × 2mm DFN package to allow a small
converter footprint and lower parts cost.
Buck Mode Driver for Ten White LEDs
■
4.5V to 55V Input Voltage Range
■
Up to 50mA LED Current
■
80mA, 55V Switch
■
Internal Schottky Diode
■
15μA Supply Current in Shutdown
■
500μA Supply Current Operating, Not Switching
■
Switching Frequency: 850kHz
■
200mV Feedback Voltage with ±5% Accuracy
■
CTRL Input Performs Dimming and Shutdown
■
91% Effi ciency (10 LEDs, 50mA)
■
Requires Only 1μF Output Capacitor
■
8-Lead SC70 Package
■
6-Lead 2mm × 2mm DFN Package
■
LED Fixed Signage
■
Traffi c Signs
■
Neon Sign Replacement
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
V
IN
48V
CONTROL
CTRL
V
IN
4Ω
50mA
LT3590
VREG SW
LED
GND
1μF
0.1μF
1μF
3590 TA01a
470μH
Conversion Effi ciency
LED CURRENT (mA)
0
EFFICIENCY (%)
70
80
90
30
50
60
50
40
10 20 40
100
3590 TA01b
LT3590
2
3590f
ABSOLUTE MAXIMUM RATINGS
Input Voltage (V
IN
) ..................................... –0.3V to 55V
LED Voltage ............................................... –0.3V to 55V
CTRL Voltage ................................................. 0V to 6.0V
VREG Voltage ................................................. 0V to 4.0V
Operating Junction Temperature Range
(Note 2) ...............................................–40°C to 85°C
(Note 1)
Maximum Junction Temperature........................... 125°C
Storage Temperature Range ...................–65°C to 150°C
Lead Temperature (Soldering, 10 sec)
SC 8 Package Only ............................................ 300°C
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3590EDC#PBF LT3590EDC#TRPBF LCNZ 6-Lead (2mm × 2mm) Plastic DFN –40°C to 85°C
LT3590ESC8#PBF LT3590ESC8#TRPBF LCPB 8-Lead Plastic SC70 –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to: http://www.linear.com/tapeandreel/
TOP VIEW
VREG
LED
V
IN
CTRL
GND
SW
DC PACKAGE
6-LEAD (2mm × 2mm) PLASTIC DFN
4
5
7
6
3
2
1
SW 1
GND 2
GND 3
GND 4
8 V
IN
7 LED
6 VREG
5 CTRL
TOP VIEW
SC8 PACKAGE
8-LEAD PLASTIC SC70
T
JMAX
= 125°C, θ
JA
= 75°C/W TO 95°C/W
T
JMAX
= 125°C, θ
JA
= 65°C/W TO 85°C/W, θ
JC
= 20°C/W
EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB
PIN CONFIGURATION
ORDER INFORMATION
LT3590
3
3590f
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT3590E is guaranteed to meet performance specifi cations
from 0°C to 85°C junction temperature. Specifi cations over the –40°C
to 85°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage
4.5 V
LED Current Sense Voltage (V
IN
-V
LED
)
●
190 200 210 mV
Sense Voltage Load Regulation ΔI
LED
= 10mA to 50mA
5 mV
Quiescent Current ON, No Switching V
LED
= 47.7V 500 700 μA
Quiescent Current in Shutdown V
CTRL
= 0V 15 20 μA
Switching Frequency
●
650 850 1050 kHz
Maximum Duty Cycle
●
90 %
Switch Current Limit
80 115 150 mA
Switch V
CESAT
I
SW
= 50mA 500 mV
Switch Leakage Current V
SW
= 48V 1 2 μA
V
CTRL
for Full LED Current
●
1.5 V
V
CTRL
to Shut Down IC 100 mV
V
CTRL
to Turn on IC 150 mV
CTRL Pin Bias Current V
CTRL
= 1V, Current Out of Pin 100 nA
LED Pin Bias Current V
LED
= 47.8V 9 14 μA
LDO Voltage V
REG
I
VREG
= 1mA 3.1 3.3 3.5 V
LDO Load Regulation ΔI
VREG
= 0mA to 1mA 17 mV
LDO Current Limit 1.5 mA
Schottky Forward Drop I
SCHOTTKY
= 50mA 0.8 V
Schottky Leakage Current V
R
= 48V 4 μA
The ● denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C, V
IN
= 48V, V
CTRL
= 3.3V, unless otherwise noted.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

LT3590ESC8#TRPBF

Mfr. #:
Buy LT3590ESC8#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
LED Lighting Drivers 48V LED Driver in SC70
Lifecycle:
New from this manufacturer.
Delivery:
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