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IC manufacturers ADI Power by Linear

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ADI Power by Linear LT3748 | Demoboard DC1860A

No-Opto Isolated FlybacK Converter for PSE Applications

Overview

TopologyFlyback Converter
Input voltage10-15 V
Output 152.5 V / 0.7 A
IC revision3

Description

Demonstration circuit 1860A is an isolated flyback converter featuring LT3748. The demo circuit is designed for Power Sourcing Equipment (PSE) applications with a 52.5V output from a 10V to 15V DC input, with nominalinput voltage of 12V. The output current is from 0mA to 700mA, and capable of maximum short period overload current of 900mA. Table 1 summarizes the performance of the demo board. The demo circuit can be easily modifiedfor different PSE applications with some pre-designed transformers.

The LT3748 is a high input voltage isolated flyback controller operating with input supply voltages from 5V to 100V, and 1.9A average gate drive source and sink current. The LT3748 utilizes boundary mode operation to provide a high efficiency, small size solution with improved regulation.The part senses the isolated output voltage directly from the primary side flyback waveform during the off time of the power switch. No third winding, opto-coupler, or signal transformer is required for regulation.

The LT3748 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this quick start guide for demo circuit 1860A.

Features

Remarks:L1=0.47uH L2(OPT)=47uHL1=1.8uH And Transformer T1 Used

Products

Order Code Data­sheet Simu­lation Downloads Product seriesLR
(µH)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
MaterialVersionVINVOut1
(V)
IOut1
(A)
Vaux
(V)
L
(µH)
nISAT
(A)
LS
(µH)
VT
(V (AC))
SizeIC Reference Samples
744355147SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

8 files WE-HCI SMT Flat Wire High Current Inductor 0.41 0.67 100 WE-PERM SMT 0.47 1365
750311456SPEC
7 files WE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748 2.4 36 V (DC) 12 1 8 100 3:1:0.667 2.4 0.9 2500 EP13 LT3748
750311604SPEC
7 files WE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748 9.5 20 - 48 V (DC) 24 1.3 10 8 1:1:0.42 9.5 0.4 1500 EFD20 LT3748
750311591SPEC
7 files WE-FB Flyback Transformer suitable for LT3573/ LT3574/ LT3575/ LT3748 20 20 - 48 V (DC) 15 3 10 8 1.5:1:0.67 20 0.4 1500 EFD25 LT3748
Order Code Data­sheet Simu­lation
744355147SPEC

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

750311456SPEC
750311604SPEC
750311591SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesLR
(µH)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
MaterialVersionVINVOut1
(V)
IOut1
(A)
Vaux
(V)
L
(µH)
nISAT
(A)
LS
(µH)
VT
(V (AC))
SizeIC Reference Samples