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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 LT8315EFE#PBF is an isolated flyback converter IC from Analog Devices, designed for high-voltage offline applications. It operates with an input voltage range of 18 V to 560 V and supports a maximum output voltage of 630 V. The device delivers up to 300 mA of output current while maintaining a low quiescent current of 70 uA. It utilizes a fixed switching frequency of 140 kHz and functions within a temperature range of -40°C to +125°C. Packaged in a TSSOP-EP-20 format, it integrates primary-side regulation to eliminate the need for optocouplers.
Feature Summary
- Primary-side regulation architecture eliminates the requirement for optocouplers and auxiliary windings.
- Capable of handling high input voltages up to 560 V for direct offline AC/DC conversion.
- Supports high isolation voltage requirements with output capabilities reaching 630 V.
- Features low standby power consumption through reduced quiescent current operation.
Applications
- Offline AC/DC power supplies requiring high isolation
- Industrial control systems with wide input voltage ranges
- Battery chargers for high-voltage applications
- Medical equipment power stages
Procurement Notes
Verify the specific suffix #PBF indicates lead-free tin plating compliance. Confirm the package type matches the required TSSOP-EP-20 footprint for PCB layout. Ensure the operating environment stays within the specified -40°C to +125°C thermal limits. Check for any regional distribution restrictions or limited availability status before finalizing procurement plans.
Selection Notes
Select this component when designing isolated converters that require high input voltage tolerance without secondary-side feedback loops. It is suitable for applications prioritizing board space reduction by removing optocouplers. Consider the 140 kHz switching frequency for transformer design trade-offs between size and efficiency. Ensure the load current does not exceed the 300 mA limit for reliable operation.
Part Context
This part belongs to the LT8315 family of isolated flyback controllers. It is specifically engineered for high-voltage offline applications where traditional optocoupler-based regulation is undesirable due to reliability or space constraints. The device simplifies design by integrating regulation on the primary side, reducing component count and improving system robustness compared to standard flyback solutions.
Replacement Considerations
No public confirmed substitute part numbers are available in the provided documentation. Verify compatibility with existing transformer designs if considering alternative primary-side regulation ICs from other manufacturers.
