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Product Detailed Parameters
- Description：IC REG CTRLR FWRD CONV 38TSSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive, Isolation Capable
- Topology：Forward Converter
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：8.5V ~ 100V
- Frequency - Switching：100kHz ~ 500kHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Frequency Control, Soft Start
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：38-TFSOP (0.173", 4.40mm Width) 31 Leads, Exposed Pad
- Supplier Device Package：38-TSSOP-EP
- Grade：-
- Qualification：-
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Overview
The LT3753IFE#PBF is a current mode PWM controller optimized for active clamp forward converter topologies, supporting input voltages up to 100V. It operates within a switching frequency range of 100 kHz to 500 kHz and features a maximum duty cycle of 50%. The device includes a programmable volt-second clamp to allow primary switch duty cycles above 50% for improved transformer utilization. It supports synchronous output control for secondary side rectification and functions within an operating temperature range of -40°C to +125°C.
Feature Summary
- Optimized for active clamp forward converter topology with up to 100V input capability
- Programmable volt-second clamp enables duty cycles exceeding 50% for enhanced component utilization
- Synchronous output pin available for controlling secondary side synchronous rectification
Applications
- Active clamp forward power supply designs
- High voltage isolated DC-DC conversion systems
- Industrial power management applications requiring efficient transformer utilization
Procurement Notes
Verify the specific suffix #PBF indicates tube packaging when sourcing. Confirm the manufacturer is Analog Devices Inc., formerly Linear Technology. Ensure the part number matches the exact specification for the 38-lead TSSOP package with missing pins designed for high voltage spacing requirements.
Selection Notes
Select this controller for applications requiring active clamp forward topology efficiency. Consider the 100V input limit and 100-500kHz frequency range. The device is suitable where synchronous rectification is needed to improve secondary side performance. Verify thermal requirements for the -40°C to +125°C operating range.
Part Context
The LT3753 belongs to a family of current mode PWM controllers designed for isolated power converters. It is specifically engineered to handle high voltage inputs while maintaining efficiency through active clamp techniques. The series supports various industrial and commercial power supply architectures.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Evaluate cross-reference options based on active clamp forward topology compatibility, 100V input rating, and 38-lead TSSOP EP package dimensions.
