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LED Driver. LT3966 Datasheet

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LED Driver. LT3966 Datasheet






LT3966 Driver. Datasheet pdf. Equivalent




LT3966 Driver. Datasheet pdf. Equivalent





Part

LT3966

Description

I2C Programmable Quad Monolithic Boost LED Driver



Feature


LT3966 I2C Programmable Quad Monolithic Boost LED Driver FEATURES n Four Indep endent DC/DC Channels n I2C Programmabl e n 8192:1 True Color PWM™ Dimming n 8-Bit Analog Dimming Pin Scaled by DAC n 11-Channel, 8-Bit ADC with 2 External Inputs n 1.6A, 60V Internal DMOS Switc hes n Input Voltage: 3V to 60V n Output Voltage and Current Monitoring to 60V n High Side PMOS Dis.
Manufacture

Analog Devices

Datasheet
Download LT3966 Datasheet


Analog Devices LT3966

LT3966; connect and PWM Switch Driver n Adjustab le Frequency: 300kHz to 4MHz with Optio nal Frequency Synchronization n Thermal ly Enhanced 6mm × 6mm 40-Lead QFN Pack age n AEC-Q100 Qualification in Progres s APPLICATIONS n Backlighting n Heads U p Displays DESCRIPTION The LT®3966 is an I2C programmable monolithic boost L ED driver with four independent channel s. Each channel prov.


Analog Devices LT3966

ides a 60V current mode boost converter with an internal 1.6A DMOS power switch , as well as internal and external anal og and PWM dimming features. I2C progra mmable features include a 13-bit (8192: 1) digital PWM generator, 8-bit analog dimming DAC, and flexible fault reporti ng and handling. An onboard 8-bit ADC a llows measurement of each channel’s o utput voltage and ou.


Analog Devices LT3966

tput current, as well as chip input volt age and two external measurements. In a ddition, independent shutdown and stand by control of each channel provides fle xible solutions for multitopology appli cations. The LT3966 is available in a t hermally enhanced 6mm × 6mm 40-Lead QF N package. All registered trademarks an d trademarks are the property of their respective owners. .

Part

LT3966

Description

I2C Programmable Quad Monolithic Boost LED Driver



Feature


LT3966 I2C Programmable Quad Monolithic Boost LED Driver FEATURES n Four Indep endent DC/DC Channels n I2C Programmabl e n 8192:1 True Color PWM™ Dimming n 8-Bit Analog Dimming Pin Scaled by DAC n 11-Channel, 8-Bit ADC with 2 External Inputs n 1.6A, 60V Internal DMOS Switc hes n Input Voltage: 3V to 60V n Output Voltage and Current Monitoring to 60V n High Side PMOS Dis.
Manufacture

Analog Devices

Datasheet
Download LT3966 Datasheet




 LT3966
LT3966
I2C Programmable Quad
Monolithic Boost LED Driver
FEATURES
n Four Independent DC/DC Channels
n I2C Programmable
n 8192:1 True Color PWM™ Dimming
n 8-Bit Analog Dimming Pin Scaled by DAC
n 11-Channel, 8-Bit ADC with 2 External Inputs
n 1.6A, 60V Internal DMOS Switches
n Input Voltage: 3V to 60V
n Output Voltage and Current Monitoring to 60V
n High Side PMOS Disconnect and PWM Switch Driver
n Adjustable Frequency: 300kHz to 4MHz with Optional
Frequency Synchronization
n Thermally Enhanced 6mm × 6mm 40-Lead QFN Package
n AEC-Q100 Qualification in Progress
APPLICATIONS
n Backlighting
n Heads Up Displays
DESCRIPTION
The LT®3966 is an I2C programmable monolithic boost
LED driver with four independent channels. Each chan-
nel provides a 60V current mode boost converter with
an internal 1.6A DMOS power switch, as well as inter-
nal and external analog and PWM dimming features. I2C
programmable features include a 13-bit (8192:1) digital
PWM generator, 8-bit analog dimming DAC, and flexible
fault reporting and handling.
An onboard 8-bit ADC allows measurement of each
channel’s output voltage and output current, as well
as chip input voltage and two external measurements.
In addition, independent shutdown and standby con-
trol of each channel provides flexible solutions for
multitopology applications.
The LT3966 is available in a thermally enhanced 6mm ×
6mm 40-Lead QFN package.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
100W Buck Mode LED Driver with I2C Dimming
VIN
44V TO 52V
ISP1
ISP2
ISP3
ISP4
4.7μF
×4
330mΩ
ISN1
330mΩ
ISN2
330mΩ
ISN3
330mΩ
ISN4
100
TG1
TG2
TG3
TG4
95
Efficiency
1MΩ
33k
1μF
1μF
1μF
1μF
68μH
68μH
68μH
68μH
VIN SW1
SW2
SW3
SW4
EN/UVLO
GND
LT3966
ISP1–4
ISN1–4
TG1–4
EXT1
CTRL/
EXT2 PWM1–4
INTVCC
FB1–4
SDA SCL ALERT RT
SYNC ADR1–2 INTVCC
150k
3966 TA01a
I2C 360kHz
BUS MULTI-
PHASE
4.7μF
97.6k
22.1k
90
85
80
75
fSW = 360kHz
VIN = 48V
VOUT = 34V
70
0.0 0.5 1.0 1.5 2.0 2.5 3.0
LED CURRENT (A)
(4 × 750mA/4 CH)
3966 TA01b
Rev. 0
Document Feedback
For more information www.analog.com
1




 LT3966
LT3966
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN, EN/UVLO, SW1, SW2, SW3, SW4, ISP1, ISP2,
ISP3, ISP4, ISN1, ISN2, ISN3, ISN4.......................62V
ISP–ISN (Any Channel)................................................2V
TG1–4................................................................. (Note 2)
INTVCC................................................................ (Note 3)
FB1–4, EXT1–2, CTRL/PWM1–4, ADR1–2, ALERT,
SDA, SCL, SYNC...................................................5.5V
RT................................................................................2V
Operating Junction Temperature Range (Notes 4, 5)
LT3966E............................................. –40°C to 125°C
LT3966J............................................. –40°C to 150°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
40 39 38 37 36 35 34 33 32 31
ISP1 1
30 ISP2
TG1 2
29 TG2
SW1 3
28 SW2
SW1 4
27 SW2
SW3 5
SW3 6
41
26 SW4
GND
25 SW4
TG3 7
24 TG4
ISP3 8
23 ISP4
ISN3 9
22 ISN4
FB3 10
21 FB4
11 12 13 14 15 16 17 18 19 20
QFN PACKAGE
40-LEAD (6mm × 6mm) PLASTIC QFN
TJMAX = 150°C, θJA = 33°C/W EXPOSED PAD (PIN 41) IS GND
AND MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT3966EUJ#PBF
LT3966EUJ#TRPBF
LT3966UJ
40-Lead (6mm × 6mm) Plastic QFN
–40°C to 125°C
LT3966JUJ#PBF
LT3966JUJ#TRPBF
LT3966UJ
40-Lead (6mm × 6mm) Plastic QFN
–40°C to 150°C
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
ELECTRICAL CHARACTERISTICS The l denotes specifications that apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. VIN = 12V unless otherwise noted.
PARAMETER
VIN Operating Range
VIN Quiescent Current
VIN Shutdown Current
EN/UVLO Shutdown Threshold Falling
EN/UVLO Rising Hysteresis
EN/UVLO Input Low Voltage
CONDITIONS
CTRL/PWM = 0V, EN/UVLO = 1.3V
EN/UVLO = 0V
EN/UVLO = 1.15V, CTRL/PWM = 0V
EN/UVLO Rising
IVIN < 1μA
MIN
TYP
MAX UNITS
l
3
60
V
2.7
3.3
mA
0
1
µA
190
230
µA
l 1.20
1.23
1.26
V
15
mV
0.4
V
Rev. 0
2
For more information www.analog.com




 LT3966
LT3966
ELECTRICAL CHARACTERISTICS The l denotes specifications that apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. VIN = 12V unless otherwise noted.
PARAMETER
CONDITIONS
EN/UVLO Bias Current Low
EN/UVLO = 1.15V
EN/UVLO Bias Current High
EN/UVLO = 1.3V
LDO Regulator
INTVCC Regulation Voltage
IINTVCC = –1mA, Not Switching
l
INTVCC Line Regulation
3V ≤ VIN ≤ 60V
INTVCC Load Regulation
–20mA ≤ IINTVCC ≤ 0mA, Not Switching
INTVCC Undervoltage Lockout
INTVCC Falling
l
INTVCC Undervoltage Lockout Hysteresis
INTVCC Rising
INTVCC Current Limit
VIN = 12V, INTVCC = 2.8V
INTVCC Dropout Voltage
VIN = 3V, IINTVCC = –15mA
Analog-to-Digital Converter
Converter Resolution
Converter Full-Scale Voltage
Converter LSB Size
Conversion Time (tCONV)
Rt = 100kΩ, MPHASE = 0, AUTO = 0
EXT1, EXT2 Input Impedance
VEXT1 = VEXT2 = 1V
EXT1, EXT2 Internal Voltage Clamp
IEXT1 = IEXT2 = 100μA
l
EXT1, EXT2 Internal Voltage Clamp Impedance VEXT1 = VEXT2 = 2V to 5.5V
Channel 1–4 LED Current Sense Amplifiers
ISP Common Mode Voltage Range
l
Full-Scale Current Sense Threshold
(VISP–VISN)
Externally Adjusted Half-Scale Threshold
(VISP–VISN)
Externally Adjusted 1/10th Scale Threshold
(VISP–VISN)
Internally Adjusted Half-Scale Threshold
(VISP–VISN)
ISP = 55V, CTRL/PWM =1.5V, ADIM[7:0] = 0xFF l
ISP = 3V, CTRL/PWM = 1.5V, ADIM[7:0] = 0xFF l
ISP = 55V, CTRL/PWM = 0.7V, ADIM[7:0] = 0xFF l
ISP = 3V, CTRL/PWM = 0.7V, ADIM[7:0] = 0xFF l
ISP = 55V, CTRL/PWM = 0.3V, ADIM[7:0] = 0xFF l
ISP = 3V, CTRL/PWM = 0.3V, ADIM[7:0] = 0xFF l
ISP = 55V, CTRL/PWM = 1.5V, ADIM[7:0] =
l
0x7F
l
ISP = 3V, CTRL/PWM = 1.5V, ADIM[7:0] = 0x7F
Internally Adjusted 1/10th Scale Threshold
(VISP–VISN)
ISP = 55V, CTRL/PWM = 1.5V, ADIM[7:0] =
l
0x19
l
ISP = 3V, CTRL/PWM = 1.5V, ADIM[7:0] = 0x19
Overcurrent Protection Threshold (VISP–VISN) ISP = 60V
C/10 Threshold
ISP = 60V
ISP/ISN Input Bias Current (Combined)
CTRL/PWM = 3V (Active), ISP = ISN = 55V
CTRL/PWM = 0V (Standby), ISP = ISN = 55V
PWM Threshold
CTRL/PWM Falling
l
MIN
2.9
2.6
1.266
4.95
10
1.4
3
242
242
122
122
20
20
121
121
20
20
14
90
TYP
2
10
3
0.03
0.04
2.7
75
36
320
8
1.275
5
20
100
1.7
2.2
250
250
125
125
25
25
125
125
25
25
370
22
440
13
103
MAX UNITS
µA
100
nA
3.1
V
%/V
%/mA
2.8
V
mV
mA
mV
Bits
1.284
V
5.05
mV
µs
1.9
V
55
V
255
mV
255
mV
128
mV
128
mV
31
mV
31
mV
129
mV
129
mV
31
mV
31
mV
mV
30
mV
µA
17
µA
115
mV
Rev. 0
For more information www.analog.com
3



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