Datasheet Linear Technology LT8315

Manufacturer	Linear Technology
Series	LT8315

560VIN Micropower No-Opto Isolated Flyback Converter with 630V/300mA Switch

Datasheets

Preview and Download

PDF, 1.6 Mb, Language: en, File uploaded: Mar 27, 2018, Pages: 24
560VIN Micropower No-Opto Isolated Flyback Converter with 630V/300mA Switch

Extract from the document

Prices

Packaging

	LT8315EFE#PBF	LT8315EFE#TRPBF	LT8315HFE#PBF	LT8315HFE#TRPBF	LT8315IFE#PBF	LT8315IFE#TRPBF
N	1	2	3	4	5	6
Package	TSSOP-20 Package Outline Drawing	TSSOP-20 Package Outline Drawing	TSSOP-20 Package Outline Drawing	TSSOP-20 Package Outline Drawing	TSSOP-20 Package Outline Drawing	TSSOP-20 Package Outline Drawing
Package Code	FE	FE	FE	FE	FE	FE
Package Index	05-08-1990	05-08-1990	05-08-1990	05-08-1990	05-08-1990	05-08-1990
Pin Count	20	20	20	20	20	20

Parametrics

Parameters / Models	LT8315EFE#PBF	LT8315EFE#TRPBF	LT8315HFE#PBF	LT8315HFE#TRPBF	LT8315IFE#PBF	LT8315IFE#TRPBF
Demo Boards	DC2337A,DC2478A	DC2337A,DC2478A	DC2337A,DC2478A	DC2337A,DC2478A	DC2337A,DC2478A	DC2337A,DC2478A
Design Tools	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File	LTspice File
Export Control	no	no	no	no	no	no
Features	No Opto Isolator, Burst Mode	No Opto Isolator, Burst Mode	No Opto Isolator, Burst Mode	No Opto Isolator, Burst Mode	No Opto Isolator, Burst Mode	No Opto Isolator, Burst Mode
Frequency, kHz	140	140	140	140	140	140
Integrated Inductor	no	no	no	no	no	no
Ishutdown, µA	8	8	8	8	8	8
Isupply, mA	0.07	0.07	0.07	0.07	0.07	0.07
Max Phases	1	1	1	1	1	1
Monolithic	yes	yes	yes	yes	yes	yes
Number of Outputs	1	1	1	1	1	1
Operating Temperature Range, °C	0 to 85	0 to 85	-40 to 125	-40 to 125	-40 to 85	-40 to 85
Polyphase	no	no	no	no	no	no
Switch Current, A	0.8	0.8	0.8	0.8	0.8	0.8
Synchronous	no	no	no	no	no	no
Topology	Flyback	Flyback	Flyback	Flyback	Flyback	Flyback
Topology 1	Flyback	Flyback	Flyback	Flyback	Flyback	Flyback
Vin Max, V	560	560	560	560	560	560
Vin Min, V	18	18	18	18	18	18
Vout Max, V	630	630	630	630	630	630
Vout Maximum	630V	630V	630V	630V	630V	630V
Vref Accuracy Over Temp, %	2	2	2	2	2	2
Vswitch Max, V	630	630	630	630	630	630

Eco Plan

	LT8315EFE#PBF	LT8315EFE#TRPBF	LT8315HFE#PBF	LT8315HFE#TRPBF	LT8315IFE#PBF	LT8315IFE#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant	Compliant	Compliant

Design Notes

Download
560V Input, No-Opto Isolated Flyback Converter &mdash DN559
PDF, 383 Kb, File published: Jan 18, 2017
Extract from the document
Design Note
560V Input, No-Opto Isolated Flyback Converter
George Qian
Introduction
In traditional isolated high voltage flyback converters, tight
regulation is achieved using opto-couplers to transfer
regulation information from the secondary-side reference
circuitry to the primary side. The problem is that optocouplers add significant complexity to isolated designs:
there is propagation delay, aging, and gain variation, all
of which complicate power supply loop compensation and
can reduce reliability. Moreover, during start-up, either a
bleeder resistor or high voltage start-up circuit is required
to initially power up the IC. Unless an additional high voltage
MOSFET is added to the start-up components, the bleeder
resistor is a source of unwelcome power loss.
The LTВ®8315 is a high voltage flyback converter with an
integrated 630V/300mA switch. The LT8315 eliminates
the need for an opto-coupler, complicated secondary-side
reference circuitry, additional start-up components, and an
external high voltage MOSFET. Performance and Simplicity
The LT8315 integrates a 630V MOSFET and control circuitry
inside a thermally enhanced 20-pin TSSOP package with
four pins removed for high voltage spacing. By sampling …

Articles

Download
560V Input, No-Opto Isolated Flyback Converter &mdash LT Journal
PDF, 176 Kb, File published: Jul 7, 2017
Extract from the document
560V Input, No-Opto Isolated Flyback Converter
George Qian In traditional isolated high voltage flyback converters, tight regulation is achieved using
opto-couplers to transfer regulation information from the secondary-side reference
circuitry to the primary side. The problem is that opto-couplers add significant complexity
to isolated designs: there is propagation delay, aging, and gain variation, all of which
complicate power supply loop compensation and can reduce reliability. Moreover,
during start-up, either a bleeder resistor or high voltage start-up circuit is required to
initially power up the IC. Unless an additional high voltage MOSFET is added to the
start-up components, the bleeder resistor is a source of unwelcome power loss.
The LT8315 is a high voltage flyback
converter with an integrated 630V/300mA
switch. The LT8315 eliminates the
need for an opto-coupler, complicated
secondary-side reference circuitry,
additional start-up components, and
an external high voltage MOSFET.
PERFORMANCE AND SIMPLICITY The LT8315 integrates a 630V MOSFET
and control circuitry inside a thermally
enhanced 20-pin TSSOP package with four
pins removed for high voltage spacing.
By sampling the isolated output voltage
from the third winding, no opto-coupler
is required for regulation. The output …

Model Line

Series: LT8315 (6)

LT8315EFE#PBF LT8315EFE#TRPBF LT8315HFE#PBF LT8315HFE#TRPBF LT8315IFE#PBF LT8315IFE#TRPBF

Manufacturer's Classification

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

Related publications

EMS supplier

Slices

Microcontrollers