Datasheet Linear Technology LT3837

Manufacturer	Linear Technology
Series	LT3837

Isolated No-Opto Synchronous Flyback Controller

Datasheets

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PDF, 324 Kb, Language: en, File uploaded: Sep 19, 2017, Pages: 28
Isolated No-Opto Synchronous Flyback Controller

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Packaging

	LT3837EFE#PBF	LT3837EFE#TRPBF	LT3837IFE#PBF	LT3837IFE#TRPBF
N	1	2	3	4
Package	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing	TSSOP-16 Package Outline Drawing
Package Code	FE	FE	FE	FE
Package Index	05-08-1663 (BC)	05-08-1663 (BC)	05-08-1663 (BC)	05-08-1663 (BC)
Pin Count	16	16	16	16

Parametrics

Parameters / Models	LT3837EFE#PBF	LT3837EFE#TRPBF	LT3837IFE#PBF	LT3837IFE#TRPBF
Demo Boards	DC1038A-A,DC1038A-B,DC1038A-C,DC950A-B	DC1038A-A,DC1038A-B,DC1038A-C,DC950A-B	DC1038A-A,DC1038A-B,DC1038A-C,DC950A-B	DC1038A-A,DC1038A-B,DC1038A-C,DC950A-B
Design Tools	LTspice Model	LTspice Model	LTspice Model	LTspice Model
Export Control	no	no	no	no
Features	No Opto Isolator, Resistor Set Frequency, External Synchronization	No Opto Isolator, Resistor Set Frequency, External Synchronization	No Opto Isolator, Resistor Set Frequency, External Synchronization	No Opto Isolator, Resistor Set Frequency, External Synchronization
Frequency, kHz	250	250	250	250
Frequency Adjust Range	50kHz - 250kHz	50kHz - 250kHz	50kHz - 250kHz	50kHz - 250kHz
Frequency Sync Range	50kHz - 250kHz	50kHz - 250kHz	50kHz - 250kHz	50kHz - 250kHz
Integrated Inductor	no	no	no	no
Isupply, mA	6.4	6.4	6.4	6.4
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	12	12	12	12
Synchronous	yes	yes	yes	yes
Topology	Flyback	Flyback	Flyback	Flyback
Vin Max, V	20	20	20	20
Vin Min, V	4.5	4.5	4.5	4.5
Vout Maximum	3, 5, 12 and higher	3, 5, 12 and higher	3, 5, 12 and higher	3, 5, 12 and higher

Eco Plan

	LT3837EFE#PBF	LT3837EFE#TRPBF	LT3837IFE#PBF	LT3837IFE#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Design Notes

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Flyback Controller Simplifies Design of Low Input Voltage DC/DC Converters &mdash DN410
PDF, 100 Kb, File published: Jan 8, 2007
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advertisement Flyback Controller Simplifies Design of Low Input Voltage DC/DC
Converters вЂ“ Design Note 1016
David Burgoon
Introduction
Small, high efп¬Ѓciency DC/DC converters are critical to
the design of leading-edge electronics. Achieving high
accuracy and efп¬Ѓciency traditionally means adding extra
components, complexity, and size. Not so with the LT3837.
This п¬‚yback controller serves 10W to 60W isolated applications with high performance, simplicity, small size,
and a minimum component count. blanking yields a high performance loop that is easy to
compensate. High-Efп¬Ѓciency Controller Capabilities
The LTВ® 3837 operates from a 4.5V to 20V input, but the
converter input range can be extended upwards by using
a VCC regulator and/or a bias winding on the transformer.
It also provides a synchronous rectiп¬Ѓer output with
adjustable timing to optimize efп¬Ѓciency and enhance
cross-regulation in multiple-output supplies. 3.3V, 10A Converter Operates from a 9V to18V
Source
The circuit shown in Figure 1 is a п¬‚yback design for a 3.3V,
10A output from a 9V to 18V input with a minimum of
external components. The LT3837 samples the voltage on
the primary winding during the п¬‚yback interval to provide
superb regulation. Figure 2 shows ruler-п¬‚at regulation at …

Model Line

Series: LT3837 (4)

LT3837EFE#PBF LT3837EFE#TRPBF LT3837IFE#PBF LT3837IFE#TRPBF

Manufacturer's Classification

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

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