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Product Detailed Parameters
- Description：IC REG FLYBACK 800MA 20TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Function：Step-Down, Step-Up/Step-Down
- Output Configuration：Positive, Isolation Capable
- Topology：Flyback
- Output Type：Fixed
- Number of Outputs：1
- Voltage - Input (Min)：18V
- Voltage - Input (Max)：560V
- Voltage - Output (Min/Fixed)：-
- Voltage - Output (Max)：-
- Current - Output：800mA
- Frequency - Switching：220Hz ~ 140kHz
- Synchronous Rectifier：No
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：20-TSSOP (0.173", 4.40mm Width), 16 Leads, Exposed Pad
- Supplier Device Package：20-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT8315IFE#PBF is an isolated flyback converter from Analog Devices, designed for ultra-high voltage applications. It operates with an input voltage range of 18 V to 560 V and provides a regulated output up to 630 V at 300 mA. The device integrates a high-voltage startup circuit and eliminates the need for optocouplers or primary-side regulation feedback loops. Key electrical parameters include a switching frequency of 140 kHz, a quiescent current of 70 uA, and operation across a temperature range of -40°C to +125°C. It is housed in a TSSOP-EP-20 package.
Feature Summary
- Eliminates the requirement for optocouplers or auxiliary windings through integrated secondary-side sensing technology.
- Supports direct connection to high-voltage DC sources such as utility lines or industrial bus voltages.
- Integrates a high-voltage startup circuit to enable operation from very low initial input voltages.
Applications
- Industrial power supplies requiring high isolation voltages
- Utility-powered equipment and smart metering systems
- High-voltage battery chargers for electric vehicles
Procurement Notes
Verify the specific suffix against official documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status directly with the manufacturer's latest datasheet. Ensure the procurement channel is authorized to guarantee component authenticity and traceability. Check for any recent product change notifications that may affect pinout or thermal characteristics.
Selection Notes
Select this component when designing isolated converters that require high input voltages without optocoupler compensation. Evaluate thermal performance requirements due to the high voltage stress on internal switches. Consider the 140 kHz switching frequency for transformer design optimization. Verify that the external components support the maximum 630 V output capability safely.
Part Context
This part belongs to the LT8315 family of ultra-high voltage isolated flyback converters. It shares architectural similarities with other members like the LT8315EFE#PBF but differs in operating temperature ratings. The series is engineered for applications demanding high reliability and simplified bill of materials by removing feedback isolation barriers.
Replacement Considerations
LT8315EFE#PBF offers identical electrical performance but with an extended maximum junction temperature rating of 150°C compared to the standard 125°C rating of the LT8315IFE#PBF. Select the EFE variant if higher thermal margins are required in the application environment.
