Datasheet Linear Technology LT3825EFE#PBF

Manufacturer	Linear Technology
Series	LT3825
Part Number	LT3825EFE#PBF

Isolated No-Opto Synchronous Flyback Controller with Wide Input Supply Range

Datasheets

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PDF, 390 Kb, Language: en, File uploaded: Sep 19, 2017, Pages: 32
Isolated No-Opto Synchronous Flyback Controller with Wide Input Supply Range

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Prices

Packaging

Package	TSSOP-16
Package Code	FE
Package Index	05-08-1663 (BC)

Parametrics

Demo Boards	DC1143A,DC950A-A,DC894A-A,DC894B-C,DC894C-B,DC894C-C
Design Tools	LTspice File
Export Control	no
Features	No Opto Isolator, Resistor Set Frequency, External Synchronization
Frequency	250 kHz
Frequency Adjust Range	50kHz - 250kHz
Frequency Sync Range	50kHz - 250kHz
Integrated Inductor	no
Ishutdown	50 µA
Isupply	1 mA
Monolithic	no
Number of Outputs	1
Operating Temperature Range	0 to 85 °C
Polyphase	no
Switch Current	12 A
Synchronous	yes
Topology	Flyback
Vin Max	75 V
Vin Min	14 V
Vout Maximum	3, 5, 12 and higher

Eco Plan

RoHS

Compliant

Design Notes

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Simple High Efficiency Isolated Flyback Supply Without Optoisolator &mdash DN1011
PDF, 107 Kb, File published: Dec 16, 2005
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advertisement Simple High Efficiency Isolated Flyback Supply Without
Optoisolator вЂ“ Design Note 1011
Ryan Huff
Introduction
While simplicity and high efп¬Ѓciency (for cool running) are
no longer optional features in isolated power supplies, it
is traditionally difп¬Ѓcult to achieve both. Achieving high
efп¬Ѓciency often requires the use of advanced topologies
and home-brewed secondary synchronous rectiп¬Ѓcation
schemes once reserved only for higher power applications. This only adds to the parts count and to the design
complexity associated with the reference and optocoupler
circuits typically used to maintain isolation. Fortunately, a
breakthrough IC makes it possible to achieve both high efп¬Ѓciency and simplicity in a synchronous п¬‚yback topology.
The LTВ® 3825 simpliп¬Ѓes and improves the performance of
low voltage, high current п¬‚yback supplies by providing
precise synchronous rectiп¬Ѓer timing and eliminating the
need for optocoupler feedback while maintaining excellent
regulation and superior loop response. current of 12A compares favorably to that of a higher
parts count forward converter design. This is primarily
the result of a simple, well-controlled implementation of
synchronous rectiп¬Ѓcation. Furthermore, due to its high
efп¬Ѓciency operation, the greatest temperature rise of any
component is only 60В°C above the ambient temperature …

Articles

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Simple, High Efficiency, Multi-Output, Isolated Flyback Supply with Excellent Regulation &mdash LT Journal
PDF, 96 Kb, File published: Nov 22, 2006
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LвЂ‰DESIGN IDEAS Simple, High Efficiency, Multi-Output,
Isolated Flyback Supply with
by Ryan Huff
Excellent Regulation
Introduction accomplished with inefficient, linear
post regulators or efficient (but relatively expensive) switch-mode buck
regulator ICs. All of these solutions
fail the simplicity test in parts count
and design complexity.
Fortunately, a breakthrough IC
makes it possible to achieve high
efficiency and tight regulation while
maintaining the simplicity typically Simplicity, tight regulation, and high
efficiency are no longer optional features in isolated power supplies, but
achieving all three is traditionally
difficult. High efficiency often requires
the use of advanced topologies and
home-brewed secondary synchronous
rectification schemes. Tight regulation
for a multi-output supply is often L1-L2 DO1813P-331HC (COILCRAFT)
L3: DO1813P-561HC (COILCRAFT)
Q5: FMMT618 (ZETEX)
Q6: FMMT718 (ZETEX) …

Model Line

Series: LT3825 (2)

LT3825EFE#PBF LT3825EFE#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Flyback, Forward and Isolated Controllers

Other Names:

LT3825EFEPBF, LT3825EFE PBF