OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LT3496EUFD#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LT3496
1
3496ff
Features
applications
Description
Triple Output LED Driver
The LT
®
3496 is a triple output DC/DC converter designed
to operate as a constant-current source and is ideal for
driving LEDs. The LT3496 works in buck, boost or buck-
boost mode. The LT3496 uses a fixed frequency, current
mode architecture resulting in stable operation over a
wide range of supply and output voltages. A frequency
adjust pin allows the user to program switching frequency
between 330kHz and 2.1MHz to optimize efficiency and
external component size.
The LT3496 supports 3000:1 dimming control on each
channel. Each of the three regulators is independently
operated by that channel’s PWM signal. The PWM feature
allows precise adjustment of the color mixing or dimming
ratio of the LED source. Each of the three channels has
a built-in gate driver to drive an external LED-disconnect
P-channel MOSFET, allowing high dimming range. The
output current range of each channel of the LT3496 is
programmed with an external sense resistor.
The CTRL pins are used to adjust the LED currents either
for analog dimming or overtemperature protection.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT and True Color PWM are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents, including
7199560, 7321203, and others pending.
n
True Color PWM™ Dimming Delivers Up to 3000:1
Dimming Ratio
n
Built-In Gate Driver for PMOS LED Disconnect
n
Three Independent Driver Channels with 750mA,
45V Internal Switches
n
Operates in Buck, Boost, Buck-Boost Modes
n
CTRL Pin Accurately Sets LED Current Sense
Threshold Over a Range of 10mV to 100mV
n
Adjustable Frequency: 330kHz to 2.1MHz
n
Open LED Protection
n
Wide V
IN
Supply Range:
Operation from 3V to 30V
Transient Protection to 40V
n
Surface Mount Components
n
28-Lead (4mm × 5mm) QFN and TSSOP Packages
n
RGB Lighting
n
Billboards and Large Displays
n
Automotive and Avionic Lighting
n
Constant-Current Sources
High Dimming Ratio Triple Output LED Power Supply
3000:1 PWM Dimming at 120Hz
typical application
PWM
5V/DIV
0.5µs/DIV
3496 TA01b
I
LED
0.5A/DIV
I
L
0.5A/DIV
0.5A
0.47µF
0.47µF
LED1
200mΩ 200mΩ
TG1
PV
IN
42V
7 LEDs
18µH
CAP1
0.5A
LED2
TG2
18µH
CAP2
0.5A
0.47µF
LED3
1µF
s3
200mΩ
470pF
3496 TA01a
TG3
18µH
CAP3
SW1 SW2
LT3496
GND
SW3
TG1, TG2, TG3
VC1, VC2, VC3
V
REF
CTRL1, CTRL2, CTRL3
f
ADJ
OVP1, OVP2, OVP3
CAP1, CAP2, CAP3
LED1, LED2, LED3
V
IN
PWM1, PWM2, PWM3
SHDN
PWM1, PWM2, PWM3
SHDN
V
IN
3V TO 24V
1µF
22k
LT3496
2
3496ff
absolute MaxiMuM ratings
V
IN
(Note 4) ...............................................................40V
SW1, SW2, SW3, LED1, LED2, LED3,
CAP1, CAP2, CAP3....................................................45V
TG1, TG2, TG3 .................................... CAP – 10V to CAP
PWM1, PWM2, PWM3 ..............................................20V
V
REF
, CTRL1, CTRL2, CTRL3, f
ADJ
, VC1, VC2, VC3,
OVP1, OVP2, OVP3 ..................................................2.5V
SHDN (Note 4) ...........................................................V
IN
(Note 1)
pin conFiguration
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
FE PACKAGE
28-LEAD PLASTIC TSSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SHDN
PWM3
PWM2
PWM1
V
REF
CTRL3
CTRL2
CTRL1
f
ADJ
VC3
VC2
VC1
OVP3
OVP2
V
IN
TG3
LED3
CAP3
SW3
SW2
CAP2
LED2
TG2
SW1
CAP1
LED1
TG1
OVP1
29
θ
JA
= 30°C/W, θ
JC
= 10°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
9 10
TOP VIEW
29
UFD PACKAGE
28-LEAD (4mm s 5mm) PLASTIC QFN
11 12 13
28 27 26 25 24
14
23
6
5
4
3
2
1
PWM1
V
REF
CTRL3
CTRL2
CTRL1
f
ADJ
VC3
VC2
CAP3
SW3
SW2
CAP2
LED2
TG2
SW1
CAP1
PWM2
PWM3
SHDN
V
IN
TG3
LED3
VC1
OVP3
OVP2
OVP1
TG1
LED1
7
17
18
19
20
21
22
16
8
15
θ
JA
= 34°C/W, θ
JC
= 2.7°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3496EFE#PBF LT3496EFE#TRPBF 3496FE 28-Lead Plastic TSSOP –40°C to 125°C
LT3496IFE#PBF LT3496IFE#TRPBF 3496FE 28-Lead Plastic TSSOP –40°C to 125°C
LT3496EUFD#PBF LT3496EUFD#TRPBF 3496
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3496IUFD#PBF LT3496IUFD#TRPBF 3496
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 125°C
LT3496HUFD#PBF LT3496HUFD#TRPBF 3496
28-Lead (4mm × 5mm) Plastic QFN
–40°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
*For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
orDer inForMation
Operating Junction Temperature Range (Notes 2, 6)
LT3496E ............................................ –40°C to 125°C
LT3496I ............................................. –40°C to 125°C
LT3496H ............................................ –40°C to 150°C
Storage Temperature Range
QFN .................................................... –65°C to 150°C
TSSOP ................................................. 65°C to 125°C
Lead Temperature (Soldering, 10 sec)
TSSOP .............................................................. 300°C
LT3496
3
3496ff
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 5V, V
SHDN
= 5V, CAP1, CAP2, CAP3 = 5V, PWM1, PWM2, PWM3 = 5V,
f
ADJ
= 0.5V, CTRL1, CTRL2, CTRL3 = 1.5V, OVP1, OVP2, OVP3 = 0V, unless otherwise noted.
electrical characteristics
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operation Voltage (Note 4) 3 30 V
V
IN
Undervoltage Lockout 2.1 2.4 V
Full-Scale LED Current Sense Voltage
(V
CAP1-LED1
, V
CAP2-LED2
, V
CAP3-LED3
)
CAP1, CAP2, CAP3 = 24V
l
98
97
100 103
104
mV
mV
One-Tenth Scale LED Current Sense Voltage
(V
CAP1-LED1
, V
CAP2-LED2
, V
CAP3-LED3
)
CTRL1, CTRL2, CTRL3 = 100mV, CAP1, CAP2, CAP3 = 24V
H-Grade
E-Grade, I-Grade
l
l
7.5
7.5
10
10
13.5
12.5
mV
mV
CAP1, CAP2, CAP3 Operating Voltage 0V ≤ V
CAP1-LED1
≤ 104mV
0V ≤ V
CAP2-LED2
≤ 104mV
0V ≤ V
CAP3-LED3
≤ 104mV
2.5 45 V
V
REF
Output Voltage I
REF
= 200µA, Current Out of Pin
l
1.96 2 2.04 V
V
REF
Line Regulation 3V ≤ V
IN
≤ 40V, I
REF
= 10µA 0.03 %/V
Quiescent Current in Shutdown SHDN = 0V 0.1 10 µA
Quiescent Current Idle PWM1, PWM2, PWM3 = 0V 6 7.5 mA
Quiescent Current Active (Not Switching) 11 14 mA
Switching Frequency f
ADJ
= 1.5V
f
ADJ
= 0.5V
f
ADJ
= 0.1V
1900 2100
1300
330
2300 kHz
kHz
kHz
Maximum Duty Cycle f
ADJ
= 1.5V (2.1MHz)
f
ADJ
= 0.5V (1.3MHz)
f
ADJ
= 0.1V (330kHz)
l
70 78
87
97
%
%
%
CTRL1, CTRL2, CTRL3 Input Bias Current Current Out of Pin, CTRL1, CTRL2, CTRL3 = 0.1V 20 100 nA
f
ADJ
Input Bias Current Current Out of Pin, f
ADJ
= 0.1V 20 100 nA
OVP1, OVP2, OVP3 Input Bias Current Current Out of Pin, OVP1, OVP2, OVP3 = 0.1V 10 100 nA
OVP1, OVP2, OVP3 Threshold 0.95 1 1.05 V
VC1, VC2, VC3 Idle Input Bias Current PWM1, PWM2, PWM3 = 0V –20 0 20 nA
VC1, VC2, VC3 Output Impedance CAP1, CAP2, CAP3 = 24V 10 MΩ
EAMP g
m
(ΔI
VC
/ΔV
CAP-LED
)
CAP1, CAP2, CAP3 = 24V 200 µS
SW1, SW2, SW3 Current Limit (Note 3) 750 1000 1250 mA
SW1, SW2, SW3 V
CESAT
I
SW
= 500mA (Note 3) 260 mV
SW1, SW2, SW3 Leakage Current SHDN = 0V, SW = 5V 2 µA
CAP1, CAP2, CAP3 Input Bias Current 180 250 µA
CAP1, CAP2, CAP3, LED1, LED2, LED3 Idle Input
Bias Current
PWM1, PWM2, PWM3 = 0V 1 µA
CAP1, CAP2, CAP3, LED1, LED2, LED3 Input Bias
Current in Shutdown
SHDN = 0V 1 µA
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LT3496EUFD#PBF

Mfr. #:
Buy LT3496EUFD#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
LED Lighting Drivers High Current, 45V, 2.1MHz Triple Output LED Driver in 4x4 QFN
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet