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Product Detailed Parameters
- Description：IC REG CTRLR FLYBACK 16SSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive or Negative, Isolation Capable
- Topology：Flyback
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：9.7V ~ 22V
- Frequency - Switching：90kHz ~ 115kHz
- Duty Cycle (Max)：90%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Enable, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：16-SSOP (0.154", 3.90mm Width)
- Supplier Device Package：16-SSOP
- Grade：-
- Qualification：-
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Overview
The LT1725IGN#TRPBF is a monolithic switching regulator controller designed for isolated flyback topologies. It drives the gate of an external MOSFET to regulate positive or negative outputs capable of isolation. The device supports step-up and step-down DC-DC conversion with a switching frequency range of 90 kHz to 115 kHz. It features a maximum duty cycle of 90% and operates within a supply voltage range of 9.7 V to 22 V. The component functions reliably across a temperature range of -40°C to +125°C TJ.
Feature Summary
- Monolithic design specifically optimized for isolated flyback converter applications
- Provides control for positive or negative output configurations with isolation capability
- Integrates enable and soft-start functionality for controlled power sequencing
Applications
- General purpose isolated flyback converters
- Step-up and step-down DC-DC conversion systems
- Power supplies requiring positive or negative isolated outputs
Procurement Notes
Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm that the IGN variant corresponds to the industrial temperature grade (-40°C to +125°C) required for your application environment. Ensure compatibility with the 16-SOIC package dimensions during PCB layout planning. Cross-reference the manufacturer's latest datasheet for any recent product change notifications regarding pinout or electrical specifications.
Selection Notes
Select this controller when designing flyback converters requiring precise duty cycle control up to 90%. It is suitable for applications needing a wide input supply range from 9.7 V to 22 V. Consider the 16-SOIC package size for space-constrained designs. Verify that the external MOSFET selection aligns with the gate drive capabilities and the desired switching frequency range between 90 kHz and 115 kHz.
Part Context
The LT1725 belongs to Analog Devices' family of switching regulators tailored for flyback topologies. This series provides robust control features for isolated power conversion. The IGN#TRPBF designation specifies the industrial temperature range and tape-and-reel packaging format, distinguishing it from tube-packaged variants like the PBF version.
Replacement Considerations
Direct substitutes include other LT1725 variants such as LT1725IS#TRPBF, which shares identical electrical characteristics but differs in packaging. Ensure any replacement maintains the 16-SOIC footprint and industrial temperature rating if environmental constraints are critical.
