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SG1843L-883B
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Product Detailed Parameters
- Description：CURRENT MODE PWMS, HIGH-RELIABIL
- Series：-
- Mfr：Microchip Technology
- Package：Tray
- 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：-55°C ~ 125°C (TA)
- Mounting Type：Surface Mount
- Package / Case：20-CLCC
- Supplier Device Package：20-CLCC (8.89x8.89)
- Grade：Military
- Qualification：MIL-STD-883
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Overview
The SG1843L-883B is a high-reliability, isolated current mode PWM controller manufactured by Microchip Technology. Designed for military and industrial applications, it operates within a temperature range of -55°C to +125°C. The device supports flyback topology with one output and features a switching frequency range from 100 Hz to 500 kHz. It offers a maximum duty cycle of 100% and utilizes a CLCC-20 surface-mount package. Key electrical characteristics include a rise and fall time of 50 ns, an operating supply current of 11 mA, and output currents of 200 mA or 1 A depending on the configuration.
Feature Summary
- High-reliability construction compliant with MIL-STD/883 standards
- Current mode PWM control architecture for precise regulation
- Isolated switching regulator design suitable for demanding environments
Applications
- Military electronic systems requiring high reliability
- Industrial power management solutions
- Commercial applications needing wide temperature operation
Procurement Notes
Verify component authenticity through official Microchip channels or authorized distributors. Confirm that the specific suffix matches the required military specification grade. Request full documentation including test reports and traceability certificates to ensure compliance with defense industry standards before finalizing acquisition.
Selection Notes
Select this component when designing isolated flyback converters for harsh environments. Ensure the system requires current mode control and operates within the specified frequency range. Verify that the CLCC-20 package fits the PCB layout constraints. Consider thermal management requirements given the wide operational temperature span.
Part Context
This part belongs to the SG1842/SG1843 family of ceramic leadless chip carrier controllers. It is specifically engineered for high-reliability applications where standard commercial components are insufficient. The designation indicates compliance with strict military quality and performance criteria.
Replacement Considerations
Consult factory documentation for JAN and DESC part availability as substitutes. Direct replacements may require verification of pin compatibility and electrical parameter alignment with the original specifications.
