Datasheet Linear Technology LTC3705

Manufacturer	Linear Technology
Series	LTC3705

2-Switch Forward Controller and Gate Driver

Datasheets

PDF, 300 Kb, File uploaded: Sep 22, 2017

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Packaging

	LTC3705EGN#PBF	LTC3705EGN#TRPBF	LTC3705IGN#PBF	LTC3705IGN#TRPBF
N	1	2	3	4
Package	SSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing	SSOP-16 Package Outline Drawing
Package Code	GN	GN	GN	GN
Package Index	05-08-1641 (GN16)	05-08-1641 (GN16)	05-08-1641 (GN16)	05-08-1641 (GN16)
Pin Count	16	16	16	16

Parametrics

Parameters / Models	LTC3705EGN#PBF	LTC3705EGN#TRPBF	LTC3705IGN#PBF	LTC3705IGN#TRPBF
Demo Boards	DC776A	DC776A	DC776A	DC776A
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no
Integrated Inductor	no	no	no	no
Isupply, mA	1.4	1.4	1.4	1.4
Monolithic	no	no	no	no
Number of Outputs	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 85	-40 to 85
Polyphase	no	no	no	no
Switch Current, A	20	20	20	20
Synchronous	yes	yes	yes	yes
Topology	Forward	Forward	Forward	Forward
Vin Max, V	80	80	80	80
Vin Min, V	18	18	18	18

Eco Plan

	LTC3705EGN#PBF	LTC3705EGN#TRPBF	LTC3705IGN#PBF	LTC3705IGN#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Design Notes

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Isolated Converters Have Buck Simplicity and Performance &mdash DN377
PDF, 85 Kb, File published: Oct 3, 2005
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Isolated Converters Have Buck Simplicity and Performance
Design Note 377
Kurk Mathews
Buck converter designers have long beneп¬Ѓted from the
simplicity, high efп¬Ѓciency and fast transient response
made possible by the latest buck controller ICs, which
feature synchronous rectiп¬Ѓcation and PolyPhaseВ® interleaved power stages. Unfortunately, these same features
have been difп¬Ѓcult or impossible to implement in the
buck converterвЂ™s close relative, the forward converter,
often used in isolated industrial and telecom applications. That is, until now. The LTC В®3706 secondary-side
synchronous controller and its companion smart gate
driver, the LTC3725, make it possible to create an isolated
forward converter with the simplicity and performance
of a buck converter.
Simple Isolated 3.3V, 30A Forward Converter
Many isolated supplies place the controller IC on the
input (primary) side and rely on indirect synchronous VIN+
1ОјF
100V
w2 1ОјF
100V Si7450DP FDC2512
365k 2t
4 t 10 3t …

Articles

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Isolated Forward Controllers Offer Buck Simplicity and Performance &mdash LT Journal
PDF, 340 Kb, File published: Jan 28, 2008
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LвЂ‰DESIGN FEATURES Isolated Forward Controllers Offer
Buck Simplicity and Performance
by Charles Hawkes and Arthur Kelley Buck converter designers have long
benefited from the simplicity, high
efficiency and fast transient response
made possible by the latest buck
controller ICs, which feature synchronous rectification and PolyPhaseВ®
operation. Unfortunately, these
same features have been difficult or
impossible to implement in the buck
converterвЂ™s close relative, the forward
converter. That is, until now. The
LTC3706/26 secondary-side synchronous controller and its companion
smart gate driver, the LTC3705/25,
make it possible to create an isolated
forward converter with the simplicity
and performance of the familiar buck
converter. rectifier timing and optoisolator feedback to control the output (secondary).
This architecture is commonly known
as primary-side control. By contrast,
secondary-side control places the
controller IC on the secondary side,
and uses a gate-drive transformer …

Model Line

Series: LTC3705 (4)

LTC3705EGN#PBF LTC3705EGN#TRPBF LTC3705IGN#PBF LTC3705IGN#TRPBF

Manufacturer's Classification

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

Related publications

Datasheets Datasheet Analog Devices LTC3705

Slices

Microcontrollers