LT3743IUFD#PBF Linear Technology, LT3743IUFD#PBF Datasheet - Page 22

• Manufacturer Part Number: LT3743IUFD#PBF
• Description: IC LED DRVR HP CONST CURR 28QFN
• Manufacturer: Linear Technology
• Type: High Power, Constant Currentr

Specifications of LT3743IUFD#PBF

• Topology: High Side, Low Side, PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: No
• Type - Primary: General Purpose
• Type - Secondary: RGB
• Frequency: 200kHz ~ 1MHz
• Voltage - Supply: 6 V ~ 36 V
• Mounting Type: Surface Mount
• Package / Case: 28-QFN
• Operating Temperature: -40°C ~ 125°C
• Internal Switch(s): Yes
• Efficiency: 92%
• Led Driver Application: Lighting
• No. Of Outputs: 1
• Output Current: 20A
• Output Voltage: 40V
• Input Voltage: 6V To 36V
• Dimming Control Type: PWM
• Operating Temperature Range: -40°C To +125°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Current - Output / Channel: -

LT3743
TYPICAL APPLICATIONS
22
499Ω
499Ω
R
R
2.2nF
2.2nF
HOT
HOT
R
10k
R
10k
CONTROL
NTC
NTC
6V to 36V, 2A LED Driver With Current Limited Shunted Output
INPUT
CTRL_SEL
82.5k
CTRL_SEL
82.5k
CONTROL
EN/UVLO
EN/UVLO
10nF
10nF
INTV
INTV
INPUT
CC
CC
6V to 36V, 2A LED Driver With Shunted Output
4.7nF
4.7nF
34k
34k
EN/UVLO
PWM
CTRL_SEL
RT
SYNC
V
CTRL_L
CTRL_H
CTRL_T
SS
EN/UVLO
PWM
CTRL_SEL
RT
SYNC
V
CTRL_H
CTRL_L
CTRL_T
SS
REF
REF
VCL
VCL
LT3743
LT3743
PWMGH
PWMGH
PWMGL
PWMGL
V
SENSE
SENSE
V
SENSE
SENSE
CBOOT
CBOOT
VCH
VCH
CC_INT
CC_INT
GND
GND
SW
SW
V
V
HG
HG
LG
34k
LG
34k
FB
FB
IN
IN
+
–
4.7nF
+
–
4.7nF
100nF
100nF
22μF
22μF
1μF
1μF
D1: LUMINUS CBT-40
L1: IHLP4040DZE10R0M01
M1, M2: Si7848BDP
M3: Si2312BDS
D1: LUMINUS CBT-40
L1: MSS1048-103MLB
M1, M2: Si7848BDP
M3: Si2312BDS
M1
M2
M1
M2
10μH
10μH
L1
L1
8.2μF
8.2μF
25mΩ
25mΩ
V
6V TO 36V
V
6V TO 36V
IN
IN
2A MAXIMUM
M3
M3
OUTPUT
2A MAXIMUM
2.2μF
OUTPUT
2.2μF
40.2k
10k
3743 TA04
40.2k
10k
3743 TA03
D1
D1
CTRL_SEL
CTRL_SEL
10V/DIV
5V/DIV
2A/DIV
1A/DIV
5V/DIV
2A/DIV
1A/DIV
2V/DIV
I
LED
SW
I
I
LED
SW
Shunted Output with CTRL_L at GND
L
I
L
Shunted Output with CTRL_H
Equal to CTRL_L
20μs/DIV
20μs/DIV
3743 TA04b
3743 TA03b
3743fb