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SG2843D
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Product Detailed Parameters
- Description：CURRENT MODE PWMS, HIGH-RELIABIL
- Series：-
- Mfr：Microchip Technology
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：30V
- Frequency - Switching：100Hz ~ 500kHz
- Duty Cycle (Max)：95%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：-
- Operating Temperature：-25°C ~ 85°C (TA)
- Mounting Type：Surface Mount
- Package / Case：14-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：14-SOIC
- Grade：Military
- Qualification：MIL-STD-883
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Overview
The SG2843D is a high-reliability isolated switching regulator and current mode PWM controller manufactured by Microchip Technology. Designed for robust power management applications, this component operates within a switching frequency of 500 kHz. It features a typical under-voltage lock-out threshold of 8.4 V to ensure stable startup conditions. The device is housed in a 14-SOIC package with a width of 3.90 mm (0.154 inches). It complies with REACH standards and supports surface-mount installation.
Feature Summary
- High-reliability isolated switching regulator design
- Current mode pulse-width modulation control architecture
- Integrated under-voltage lock-out protection mechanism
Applications
- Isolated DC-DC converter topologies
- High-reliability industrial power supplies
- Military and aerospace electronic systems
Procurement Notes
Verify the specific ordering suffix and revision level against the official Microchip datasheet before procurement. Confirm that the 14-SOIC package dimensions align with your PCB footprint requirements. Ensure supply chain sources provide valid traceability documentation for high-reliability applications. Check RoHS and REACH compliance status directly from the manufacturer's latest product change notifications.
Selection Notes
Select the SG2843D when designing isolated power stages requiring current-mode control for improved transient response. Consider the 500 kHz switching frequency for balancing efficiency and component size. Evaluate the 8.4 V UVLO threshold against your system's minimum input voltage range. Verify thermal performance capabilities within the 14-SOIC package constraints for your specific enclosure environment.
Part Context
This component belongs to Microchip Technology's portfolio of power management integrated circuits, specifically categorized under switching voltage regulators. It serves as a core control element in isolated power conversion architectures, distinct from non-isolated buck or boost controllers. The part represents a specialized solution for environments demanding high reliability and strict electromagnetic interference management.
Replacement Considerations
Consult the official Microchip replacement guide for direct pin-compatible alternatives. Verify functional equivalence regarding current-mode control and isolation requirements. Cross-reference package dimensions and electrical specifications to ensure compatibility with existing board layouts and thermal designs.
