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SG1846F
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Product Detailed Parameters
- Description：PWM CONTROLLER, HIGH-RELIABILITY
- 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：Surface Mount
- Package / Case：16-CFlatPack
- Supplier Device Package：16-CFlatPack
- Grade：Military
- Qualification：MIL-STD-883
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Overview
The SG1846F is a high-reliability current-mode PWM controller designed for isolated switching regulators. It supports flyback and push-pull topologies with a switching frequency range of 100 Hz to 500 kHz. The device features a maximum duty cycle of 50% and an output current capability of 1 A. It operates within a temperature range of -55°C to +125°C and utilizes a CFP-16 surface-mount package.
Feature Summary
- Implements fixed-frequency, current-mode control schemes for high-reliability applications.
- Provides automatic feed-forward compensation and pulse-by-pulse current limiting.
- Includes automatic symmetry correction specifically for push-pull configurations.
Applications
- High-reliability isolated switching power supplies
- Industrial power conversion systems
- Aerospace and defense electronic equipment
Procurement Notes
Verify the specific manufacturer designation, as the SG1846 family originates from Microsemi, now part of Microchip Technology. Confirm that the CFP-16 ceramic flatpack package matches the design requirements. Ensure compliance with relevant high-reliability standards required for the target application environment before finalizing procurement.
Selection Notes
Select this component when implementing current-mode control in isolated converter designs requiring high reliability. The SG1846F is suitable for applications demanding wide operating temperatures and robust protection features like pulse-by-pulse current limiting. Consider the CFP-16 package constraints for thermal management and board layout.
Part Context
The SG1846F belongs to the SG18xx family of switching controllers, which are engineered for demanding environments. This family provides essential features for current-mode control while maintaining high performance. The device serves as a core control element in various power supply architectures requiring precise regulation and protection.
Replacement Considerations
The SG1845F and SG2846 are documented members of the same control IC family. Verify pin compatibility and functional equivalence before substitution. Cross-reference datasheets to ensure the alternative part meets the specific topology and electrical requirements of the existing design.
