LT3596
60V Step-Down LED Driver
Fae Tseru Dpircse Tnoi
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300mA Buck Regulator, Drives Up to 10 LEDs per
The LT 3596 is a 60V step-down LED Driver. It achieves
Channel with Fast NPN Current Sources
10,000:1 digital PWM dimming at 100Hz with fast NPN
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Fast Current Sources for <1s Pulse Widths
current sources driving up to 10 LEDs in each channel.
(10,000:1 True Color PWM Dimming at 100Hz)
100:1 LED dimming can also be done with analog control
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LEDs Disconnected in Shutdown
of the CTRL1-3 pin.
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Adaptive V for Increased Efficiency
OUT
The step-down switching frequency is programmable
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6V to 60V Input Voltage Range
between 200kHz and 1MHz and is synchronizable to an
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1.5% Accurate LED Current Matching
external clock. The LT3596 also provides maximum LED
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External Resistors Set LED Current for Each Channel
brightness while adhering to manufacturers specifica-
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Requires No External Compensation
tions for thermal derating. The derate temperature is
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Programmable Switching Frequency (200kHz to 1MHz)
programmed by placing a negative temperature coefficient
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Synchronizable to External Clock
(NTC) resistor on the master control pin.
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Open, Short LED Detection and Reporting
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The LT3596 adaptively controls V in order to achieve
Programmable LED Thermal Derating and Reporting
OUT
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optimal efficiency. Other features include: 1.5% LED current
Programmable Temperature Protection
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matching between channels, open LED reporting, shorted
5mm 8mm Thermally Enhanced QFN Package with
LED pin protection and reporting, programmable LED cur-
0.6mm High Voltage Pin Spacing
rent and programmable temperature protection.
a acilpp Tsnoi
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation and True Color PWM is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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LED Billboards and Signboards
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Mono, Multi, Full Color LED Displays
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Large Screen Display LED Backlighting
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Automotive, Industrial and Medical Displays
T lacipy a acilpp Tn oi
48V 1MHz Step-Down 8W, 100mA LED Driver (Eight White LEDs per Channel)
V 5V
IN
V BIAS
IN
BIAS
48V
10F 4.7F
270k
EN/UVLO BOOST
100H
100nF
91k
SW V
OUT 10,000:1 PWM Dimming at 100Hz
LT3596 4.7F
100k
SYNC SYNC DA
RT
GND
3.65k
33.2k
FB z 28V PWM
PER LED 2V/DIV
PWM1 PWM1 V
OUT STRING
PWM2 PWM2
PWM3 PWM3
CTRL1 CTRL1
I
LED
CTRL2 CTRL2
50mA/DIV
CTRL3 CTRL3
BIAS
LED1
100k
LED2
LED3
FAULT FAULT
3596 TA01b
V
REF 200ns/DIV
3696 TA01a
90.9k
10k
I
SET1
TSET I
SET2
CTRLM I
SET3
49.9k 100k
20k 20k 20k
3596fa
LT3596
a ulosb T e Mixa Mu M r a Tsgni p ni c no Farugi Tnoi
(Note 1)
TOP VIEW
Input Voltage (V ), EN/UVLO ..................................60V
IN
BOOST .....................................................................80V
BOOST Pin Above SW Pin ....................................... 25V
51 50 48 46 44
43 NC
LED1-3, V ............................................................42V
OUT
FB 2
BIAS, FAULT .............................................................25V
41 NC
V , RT, I , TSET, CTRLM .................................3V
REF SET1-3
EN/UVLO 4
FB, CTRL1-3, PWM1-3, SYNC ....................................6V
39 NC
Operating Temperature Range
TSET
6
(Notes 2, 3) ............................................ 40C to 125C
V 7 37 BIAS
REF
Maximum Junction Temperature .......................... 125C
53
GND 9 35 NC
Storage Temperature Range .................. 65C to 150C
GND
34 NC
NC 11 33 CTRL1
NC 12 32 CTRL2
CTRLM 13 31 CTRL3
I 14 30 PWM1
SET1
I 15 29 PWM2
SET2
I 16 28 PWM3
SET3
27
RT 17 SYNC
18 19 20 21 22 23 24 25 26
UHG PACKAGE
VARIATION: UHG52 (39)
52-LEAD (5mm s 8mm) PLASTIC QFN
T = 125C, = 32C/W
JMAX JA
EXPOSED PAD (PIN 53) IS GND, MUST BE SOLDERED TO PCB
o r D re i n Fro Ma Tnoi
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LT3596EUHG#PBF LT3596EUHG#TRPBF 3596 52-Lead (5mm 8mm) Plastic QFN 40C to 125C
LT3596IUHG#PBF LT3596IUHG#TRPBF 3596 40C to 125C
52-Lead (5mm 8mm) Plastic QFN
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: