LT8315

PRODUCTION

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

Part Models: 6
1ku List Price: Starting From $4.90

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Overview

Wide Input Voltage Range: 18V to 560V
630V/300mA Integrated Power Switch
No Opto-Isolator Required for Regulation
Quasi-Resonant Boundary Mode Operation
Constant-Current and Constant-Voltage Regulation
Low-Ripple Light Load Burst Mode^® Operation
Low Quiescent Current: 70μA
Programmable Current Limit and Soft-Start
TSSOP Package with High Voltage Spacing

The LT8315 is a high voltage flyback converter with integrated 630V/300mA switch. No opto-isolator is needed for regulation. The device samples the output voltage from the isolated flyback waveform appearing across a third winding on the transformer. Quasi-resonant boundary mode operation improves load regulation, reduces transformer size, and maintains high efficiency.

At start-up, the LT8315 charges its INTV_CC capacitor via a current source attached to the DRAIN pin. During normal operation, the current source turns off and the device draws its power from a third winding on the transformer.

The LT8315 operates from a wide range of input supply voltages and can deliver up to 15W of power. It is available in a thermally enhanced 20-pin TSSOP package with four pins removed for high-voltage spacing.

Applications

Isolated Telecom, Automotive, Industrial, Medical Power Supplies
Isolated Off Line Housekeeping Power Supplies
Electric Vehicles and Battery Stacks

Part Models: 6
1ku List Price: Starting From $4.90

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT8315EFE#PBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8315EFE#TRPBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8315HFE#PBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8315HFE#TRPBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8315IFE#PBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT8315IFE#TRPBF	20-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report Delta Qualification Matrix
LT8315EFE#PBF	PRODUCTION
LT8315EFE#TRPBF	PRODUCTION
LT8315HFE#PBF	PRODUCTION
LT8315HFE#TRPBF	PRODUCTION
LT8315IFE#PBF	PRODUCTION
LT8315IFE#TRPBF	PRODUCTION
Apr 11, 2019 - 19_0067 Notification of Wafer Fab Location Change for 0.35 BCD Process
		PCN19_0067_Form Material_Report Delta Qualification Matrix Qualification Results Summary Detailed Parts List Other
LT8315EFE#PBF	PRODUCTION
LT8315EFE#TRPBF	PRODUCTION
LT8315HFE#PBF	PRODUCTION
LT8315HFE#TRPBF	PRODUCTION
LT8315IFE#PBF	PRODUCTION
LT8315IFE#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Protection Switches & Controllers 2
LTC4366	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper
LTM9100	PRODUCTION	Anyside^™ High Voltage Isolated Switch Controller with I²C Command and Telemetry

Tools & Simulations

LTspice 1

LT8315 Demo Circuit - µPower No-Opto Isolated Flyback Converter (20-450V to 12V @ 220mA)

Models for the following parts are available in LTspice:

LT8315

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

LT8315 Demo Board | 19V to 400VIN Non Isolated Buck, VOUT = 12V at Up to 120mA

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Product Details

Demonstration circuit 2478A is a non isolated buck converter featuring the LT8315. The demo board outputs 12V, and maintains tight regulation with a load current from 4mA to 120mA. It is optimized to operate over a wide 19V to 400V DC input voltage range. Output voltage accuracy stays within ±1% over the entire input voltage and load range.

Resources

DC2478A - Schematics
11/20/2017

DC2478 - Design Files
11/20/2017

DC2478A - Demo Board Manual
11/20/2017

LT8315EFE Isolated Demo Board | Offline Flyback, 90VAC ≤ VIN ≤ 265VAC, VOUT = 12V @ 0.55A

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Product Details

Demonstration circuit 2337A is an offline isolated flyback converter featuring LT8315. The demo board outputs 12V, and maintains tight regulation with a load current from 4mA to 0.55A. It is optimized to operate over a wide AC input voltage range (90VAC to 265VAC, 47Hz to 63Hz). Output voltage accuracy stays within ±5% over the whole input voltage and load range.