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SG1846F-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：Surface Mount
- Package / Case：16-CFlatPack
- Supplier Device Package：16-CFlatPack
- Grade：Military
- Qualification：MIL-STD-883
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Overview
The SG1846F-DESC is a high-reliability current-mode PWM switching controller manufactured by Microchip Technology. It supports isolated switching regulator topologies, specifically flyback configurations. The device operates with a maximum switching frequency of 500 kHz and delivers a maximum output current of 1 A. It features a ceramic flatpack (CDFP-10) package suitable for surface mount installation. The operational temperature range spans from -55 °C to +125 °C. Key electrical parameters include a rise time of 50 ns and a fall time of 50 ns. The input voltage range extends from 12 V to 25 V, with a nominal value of 15 V.
Feature Summary
- Current-mode pulse width modulation control architecture
- High-reliability design for isolated applications
- Ceramic metal-sealed cofired flatpack packaging
Applications
- Isolated DC-DC switching regulators
- Flyback converter designs
- Solar inverter power supplies
- High-reliability industrial power systems
Procurement Notes
Verify the specific ordering suffix and manufacturer designation when sourcing, as documentation references both Microsemi and Microchip Technology. Confirm package integrity and lead times directly with authorized distributors or the manufacturer. Ensure compliance with RoHS standards and check for any specific factory order requirements associated with this component variant.
Selection Notes
Select this component for applications requiring robust isolation and current-mode control in harsh environments. The wide operating temperature range and ceramic packaging support high-reliability deployments. Consider the 500 kHz maximum frequency and 1 A output capability against load requirements. Verify compatibility with flyback topology constraints and input voltage specifications before integration.
Part Context
This part belongs to the SG184x series of current-mode PWM controllers designed for high-reliability isolated switching regulators. The series includes variants such as the SG1845F-DESC. These components are engineered for demanding power supply applications where stability and durability are critical. The SG1846F-DESC specifically utilizes a CDFP-10 package.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-reference with other SG184x series variants only if pinout and electrical specifications match exactly.
