ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：LT3781 - SYNC. FORWARD CONTROLLE
- Series：-
- Mfr：Linear Technology
- Package：Bulk
- 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)：9V ~ 18V
- Frequency - Switching：Up to 700kHz
- Duty Cycle (Max)：50%
- Synchronous Rectifier：No
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Enable, Soft Start
- Operating Temperature：-40°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-SSOP (0.209", 5.30mm Width)
- Supplier Device Package：20-SSOP
- Grade：-
- Qualification：-
Download product information
Overview
The LT3781EG#PBF is a synchronous forward controller designed for high-efficiency power conversion. It operates at a fixed switching frequency of 350 kHz and supports input voltages from 8 V to 72 V. The device delivers up to 20 A output current with adjustable voltage regulation. It features bootstrap start capability, external synchronization up to 350 kHz, and shutdown functionality. Operating within a temperature range of -40°C to +85°C, it utilizes an SSOP-20 surface-mount package.
Feature Summary
- Dual transistor synchronous forward control architecture
- Bootstrap start mechanism for simplified gate drive
- External synchronization support up to the internal switching frequency
- Integrated shutdown pin for system power management
Applications
- Industrial power supplies
- Telecommunications equipment
- Distributed power architectures
Procurement Notes
Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status via official documentation. Check for obsolescence notices or lifecycle changes. Ensure storage conditions meet specified humidity and temperature limits. Validate part markings against official datasheet images to prevent counterfeit substitution.
Selection Notes
Select this controller for applications requiring synchronous rectification in forward converter topologies. Consider the 350 kHz frequency for balancing efficiency and component size. Evaluate thermal performance given the operating temperature range. Verify compatibility with external MOSFETs for the 20 A current requirement. Assess board space availability for the SSOP-20 package.
Part Context
Part of the LT3781 family of synchronous forward controllers. Designed by Linear Technology (now Analog Devices). Focuses on high-performance power management solutions. Integrates control logic for dual-transistor synchronous operation. Targets industrial and telecom markets requiring reliable DC-DC conversion.
Replacement Considerations
LT3781IG#TRPBF: Tape and reel version of the same functional device. LT3781EG#PBF: Tube packaged variant. Verify package type requirements before substitution. Functional parameters remain identical across these suffixes.
