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SG1845Y-883B
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Product Detailed Parameters
- Description：IC REG CTRLR FLYBACK 8CDIP
- Series：-
- Mfr：Microchip Technology
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Up/Step-Down
- Output Configuration：Positive, Isolation Capable
- Topology：Flyback
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：7.6V ~ 30V
- Frequency - Switching：1Hz ~ 500kHz
- Duty Cycle (Max)：48%
- Synchronous Rectifier：Yes
- Clock Sync：No
- Serial Interfaces：-
- Control Features：-
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Through Hole
- Package / Case：8-CDIP (0.300", 7.62mm)
- Supplier Device Package：8-CDIP
- Grade：Military
- Qualification：MIL-STD-883B
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Overview
The SG1845Y-883B is a high-reliability, current-mode PWM controller designed for isolated switching regulators. Manufactured by Microchip Technology, this component operates within a supply voltage range of 16V to 30V and supports switching frequencies up to 500kHz. It features a single channel with a maximum drive current of 100mA. The device is housed in an 8-pin Ceramic Dual In-Line Package (CDIP), ensuring robust performance for demanding applications requiring stable power management.
Feature Summary
- Current-mode PWM control architecture for precise regulation
- High-reliability construction suitable for critical systems
- Isolated switching regulator capability for safety-critical designs
Applications
- AC to DC switching converters
- Off-line switcher circuits
- High-reliability isolated power supplies
Procurement Notes
Verify the specific suffix '883B' indicates military or aerospace-grade qualification requirements. Confirm that the CDIP package matches your PCB footprint constraints. Ensure compatibility with existing thermal management solutions due to ceramic packaging characteristics. Validate that the 16V to 30V input range aligns with your system's power distribution network before finalizing procurement.
Selection Notes
Select this component when high reliability and isolation are paramount. The current-mode control offers stability advantages over voltage-mode in certain topologies. Consider the CDIP package for its superior thermal and mechanical properties compared to standard plastic packages. Verify that the 500kHz frequency limit meets your size and efficiency targets for magnetic components.
Part Context
This part belongs to Microchip's high-reliability semiconductor portfolio, often associated with MIL-SPEC standards. The SG1845 series is known for use in rugged environments where standard commercial parts may fail. The '883B' suffix typically denotes compliance with specific military screening and testing procedures defined in MIL-STD-883.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with SG1845 variants only if electrical parameters and pinout compatibility are verified through official datasheets.
