LT3743IFE#PBF Linear Technology, LT3743IFE#PBF Datasheet - Page 21

• Manufacturer Part Number: LT3743IFE#PBF
• Description: IC LED DVR HP CONST CURR 28TSSOP
• Manufacturer: Linear Technology
• Type: High Power, Constant Currentr

Specifications of LT3743IFE#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-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• 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
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Current - Output / Channel: -

TYPICAL APPLICATIONS
499Ω
R
2.2nF
HOT
50k
R
10k
NTC
CTRL_SEL
82.5k
EN/UVLO
10nF
50k
PWM
4.7nF
34k
EN/UVLO
PWM
CTRL_SEL
RT
SYNC
V
CTRL_L
CTRL_H
CTRL_T
SS
REF
VCL
LT3743
94
92
90
88
86
84
82
80
Effi ciency (Stepping from 2A to 20A)
0
PWMGH
PWMGL
V
SENSE
SENSE
V
GREEN LED
CBOOT
VCH
CC_INT
IN
CTRL_SEL DIMMING DUTY CYCLE (%)
GND
= 12V
V
SW
HG
LG
34k
FB
IN
+
–
4.7nF
20
12V, 20A LED Driver
100nF
22μF
40
1μF
D1: LUMINUS PT120
L1: IHLP4040DZER1R0M01
M1: RJK0365DPA
M2: RJK0346DPA
M3, M4: Si7236DP
C1, C2, C3: PTPR330M9L (THREE IN PARALLEL)
60
M1
M2
1.0μH
L1
80
220μF
10Ω
2.5mΩ
33nF
3743 TA02b
100
V
12V
IN
10Ω
M3
C1
330μF
C2
330μF
3
3
20A MAXIMUM
OUTPUT
M4
C3
330μF
3
3743 TA02
60.4k
10k
1μF
D1
LT3743
21
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