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SG1846J-DESC
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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-Up, Step-Down, Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Buck, Boost, Push-Pull
- Number of Outputs：2
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：8V ~ 40V
- Frequency - Switching：1kHz ~ 500kHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：-
- Control Features：Current Limit, Enable
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Through Hole
- Package / Case：16-CDIP (0.300", 7.62mm)
- Supplier Device Package：16-CERDIP
- Grade：Military
- Qualification：MIL-STD-883
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Overview
The SG1846J-DESC is a high-reliability current mode PWM controller designed for isolated switching regulators. It operates within a frequency range of 100 Hz to 500 kHz and supports a maximum duty cycle of 50%. The device features a 16-pin ceramic dual in-line package (CDIP) suitable for through-hole mounting. It functions as a DC-DC switch controller with an output current capability of 1 A. The operational temperature range spans from -55°C to +125°C, ensuring performance in demanding environments.
Feature Summary
- Implements fixed frequency current mode control schemes for isolated power supplies
- Provides comprehensive features for high-reliability switching regulator applications
- Supports flyback topology configurations
Applications
- High-reliability isolated switching regulators
- Military and aerospace power systems
- Industrial DC-DC conversion circuits
Procurement Notes
Verify the specific suffix 'DESC' against official Microchip documentation to confirm the exact package variant and environmental rating. Ensure compatibility with existing PCB footprints for 16-pin CDIP packages. Confirm that the current mode control architecture aligns with the target power supply design requirements before procurement.
Selection Notes
Select this component when designing high-reliability isolated converters requiring current mode control. Consider the 16-pin CDIP package for through-hole assembly needs. Evaluate the 100 Hz to 500 kHz frequency range against transformer specifications. Verify thermal management capabilities for the -55°C to +125°C operating range.
Part Context
The SG1846 belongs to a family of control ICs offering current mode PWM control. It is part of Microchip's high-reliability product line, often used in ruggedized electronics. The J/DESC designation indicates a specific ceramic package variant within this series, distinct from plastic DIP or flatpak options.
Replacement Considerations
Consult official substitution lists for equivalent high-reliability controllers. Verify pinout compatibility and electrical parameters such as switching frequency and output current capabilities before replacing.
