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SC4808B-1MSTRT
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Product Detailed Parameters
- Description：IC REG CTRLR MULT TOP 10MSOP
- Series：-
- Mfr：Semtech Corporation
- Package：Tape & Reel (TR)
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive, Isolation Capable
- Topology：Full-Bridge, Half-Bridge, Push-Pull
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：4.26V ~ 16V
- Frequency - Switching：50kHz ~ 1MHz
- Duty Cycle (Max)：49%
- Synchronous Rectifier：No
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Current Limit, Frequency Control
- Operating Temperature：-40°C ~ 105°C (TA)
- Mounting Type：Surface Mount
- Package / Case：10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Supplier Device Package：10-MSOP
- Grade：-
- Qualification：-
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Overview
The SC4808B-1MSTRT is a dual-ended, high-frequency integrated PWM controller designed for isolated power supply applications. It supports both current mode and voltage mode operation with secondary side error amplifier control. Key features include a low 120µA starting current, pulse-by-pulse current limit, programmable operation up to 1MHz, internal soft start, and programmable line undervoltage lockout. The device offers over-current shutdown, dual push-pull output drive stages, and external frequency synchronization for bi-phase operation.
Feature Summary
- Dual-ended architecture optimized for isolated converter topologies
- Configurable peak current mode or voltage mode operation
- External frequency synchronization enabling bi-phase ripple reduction
Applications
- Telecom equipment and power supplies
- Networking power supplies
- Industrial power supplies
- Push-pull, half bridge, and full bridge converters
Procurement Notes
Verify the specific suffix 'MSTRT' against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with RoHS and WEEE compliance requirements as stated in the product family data. Cross-reference the exact part number to distinguish between variants such as SC4808B-1 and SC4808B-2 which may have different electrical characteristics.
Selection Notes
Select this component for designs requiring flexible control modes and low quiescent current in isolated DC-DC converters. The dual push-pull drive stages suit transformer-coupled topologies. Consider the 1MHz programmable frequency range for balancing efficiency and component size. Verify thermal performance within the -40 to 105 °C operating range for industrial environments.
Part Context
This part belongs to the SC4808 series of high-performance PWM controllers from Semtech Corporation. The series is engineered for space-constrained isolated applications, offering integrated protection features like over-current shutdown and soft start. It serves as a core control element in modern switching power supplies for telecommunications and networking infrastructure.
Replacement Considerations
SC4808BIMSTRT and SC4808C are documented similar parts within the same functional family. Verify pinout compatibility and specific electrical parameter differences before substitution.
