Datasheet Linear Technology LT3782A

Manufacturer	Linear Technology
Series	LT3782A

2-Phase Step-Up DC/DC Controller

Datasheets

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PDF, 277 Kb, Revision: C, File uploaded: Sep 19, 2017

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Prices

Packaging

	LT3782AEFE#PBF	LT3782AEFE#TRPBF	LT3782AEUFD#PBF	LT3782AEUFD#TRPBF	LT3782AIFE#PBF	LT3782AIFE#TRPBF	LT3782AIUFD#PBF	LT3782AIUFD#TRPBF
N	1	2	3	4	5	6	7	8
Package	TSSOP-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	TSSOP-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing	4x5 QFN-28 Package Outline Drawing
Package Code	FE	FE	UFD	UFD	FE	FE	UFD	UFD
Package Index	05-08-1663 (EB)	05-08-1663 (EB)	05-08-1712	05-08-1712	05-08-1663 (EB)	05-08-1663 (EB)	05-08-1712	05-08-1712
Pin Count	28	28	28	28	28	28	28	28

Parametrics

Parameters / Models	LT3782AEFE#PBF	LT3782AEFE#TRPBF	LT3782AEUFD#PBF	LT3782AEUFD#TRPBF	LT3782AIFE#PBF	LT3782AIFE#TRPBF	LT3782AIUFD#PBF	LT3782AIUFD#TRPBF
Demo Boards	DC770C	DC770C	DC770C	DC770C	DC770C	DC770C	DC770C	DC770C
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no	no	no	no	no
Features	PolyPhase, Resistor Set Frequency, Soft Start	PolyPhase, Resistor Set Frequency, Soft Start	PolyPhase, Resistor Set Frequency, Soft Start	PolyPhase, Resistor Set Frequency, Soft Start	PolyPhase, Resistor Set Frequency, Soft Start	PolyPhase, Resistor Set Frequency, Soft Start	PolyPhase, Resistor Set Frequency, Soft Start	PolyPhase, Resistor Set Frequency, Soft Start
Frequency, kHz	500	500	500	500	500	500	500	500
Frequency Adjust Range	150kHz to 500kHz	150kHz to 500kHz	150kHz to 500kHz	150kHz to 500kHz	150kHz to 500kHz	150kHz to 500kHz	150kHz to 500kHz	150kHz to 500kHz
Integrated Inductor	no	no	no	no	no	no	no	no
Ishutdown, µA	40	40	40	40	40	40	40	40
Isupply, mA	11	11	11	11	11	11	11	11
Monolithic	no	no	no	no	no	no	no	no
Number of Outputs	1	1	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	0 to 85	0 to 85	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Polyphase	no	no	no	no	no	no	no	no
Sense Resistor	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense	Rsense
Switch Current, A	30	30	30	30	30	30	30	30
Synchronous	yes	yes	yes	yes	yes	yes	yes	yes
Topology	Boost	Boost	Boost	Boost	Boost	Boost	Boost	Boost
Vin Max, V	40	40	40	40	40	40	40	40
Vin Min, V	6	6	6	6	6	6	6	6
Vin Min Startup, V	6	6	6	6	6	6	6	6
Vout Max, V	72	72	72	72	72	72	72	72
Vout Maximum	12V, 24V, 48V and higher	12V, 24V, 48V and higher	12V, 24V, 48V and higher	12V, 24V, 48V and higher	12V, 24V, 48V and higher	12V, 24V, 48V and higher	12V, 24V, 48V and higher	12V, 24V, 48V and higher
Vout Min, V	12	12	12	12	12	12	12	12
Vswitch Max, V	60	60	60	60	60	60	60	60

Eco Plan

	LT3782AEFE#PBF	LT3782AEFE#TRPBF	LT3782AEUFD#PBF	LT3782AEUFD#TRPBF	LT3782AIFE#PBF	LT3782AIFE#TRPBF	LT3782AIUFD#PBF	LT3782AIUFD#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

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Low Profile Synchronous, 2-Phase Boost Converter Produces 200W with 98% Efficiency &mdash DN455
PDF, 112 Kb, File published: Oct 3, 2008
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advertisement Low Profile Synchronous, 2-Phase Boost Converter Produces
200W with 98% Efficiency вЂ“ Design Note 455
by Victor Khasiev
Introduction
Automotive audio ampliп¬Ѓers require a high power boost
converter that is both efп¬Ѓcient and compact. High
efп¬Ѓciency is essential to keep dissipated heat low and
avoid bulky and expensive heat sinks. The LT3782A
is a 2-phase synchronous PWM controller, making
it possible to produce a low proп¬Ѓle, high power boost
supply that achieves 98% efп¬Ѓciency. Output power is 200W continuous and 250W for short
pulse loads, corresponding to 8.5A continuous current
and 10.5A pulsed current.
This circuit comprises three major sections. Two are
the phase-interleaved power trains, and the third is
the control circuit.
Each power train includes an inductor, two switching
MOSFETs, a synchronous MOSFET and an output
capacitive п¬Ѓlter. The output п¬Ѓlters are connected
together in parallel. Schottky diodes D1 and D2 increase
efп¬Ѓciency during the dead time. A 24V Output Boost Converter at 8.5A
(Continuous), 10.5A (Peak) from a Car Battery
Figure 1 shows a boost converter that generates …

Articles

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High Power 2-Phase Synchronous Boost Replaces Hot Diodes with Cool FETs-No Heat Sinks Required &mdash LT Journal
PDF, 574 Kb, File published: Jan 1, 2009
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DESIGN IDEASвЂ‰L High Power 2-Phase Synchronous
Boost Replaces Hot Diodes with
Cool FETsвЂ”No Heat Sinks Required
by Narayan Raja, Tuan Nguyen and Theo Phillips Introduction
For low power designs, non-synchronous boost converters offer a simple
solution. However, as power levels increase, the heat dissipated in the boost
diode becomes a significant design
problem. In such cases, a synchro-nous boost converter, with the diode
replaced with a lower forward voltage
drop switch, significantly improves efficiency and relieves many issues with
thermal layout. Although the topology
is more complicated, Linear Technol5V ogy offers controller ICs that simplify
the design of high power synchronous
boost applications. The LT3782A boost
controller, for instance, includes predrive outputs for external synchronous
switch drivers. It also integrates strong PD3S160
Q1
VCC 1ВµF GND LTC4440-5 IN
4.7ВµF
VIN
10V TO 14V + 680ВµF 1ВµF TG
DFLS160 TS SGATE1 10ВµF
s4 BST L1 …

Model Line

Series: LT3782A (8)

LT3782AEFE#PBF LT3782AEFE#TRPBF LT3782AEUFD#PBF LT3782AEUFD#TRPBF LT3782AIFE#PBF LT3782AIFE#TRPBF LT3782AIUFD#PBF LT3782AIUFD#TRPBF

Manufacturer's Classification

Power Management > Switching Regulator > Step-Up (Boost) Regulators > External Power Switch Boost