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SG1825CJ
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Product Detailed Parameters
- Description：IC REG CTRLR BUCK/FLYBACK 16DIP
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Output Type：Transistor Driver
- Function：Step-Down, Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Buck, Flyback
- Number of Outputs：2
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：10V ~ 30V
- Frequency - Switching：4kHz ~ 1.5MHz
- Duty Cycle (Max)：85%
- Synchronous Rectifier：Yes
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Current Limit, Ramp, Soft Start
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Through Hole
- Package / Case：-
- Supplier Device Package：16-CDIP
- Grade：Military
- Qualification：MIL-STD-883B
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Overview
The SG1825CJ is a high-performance current-mode PWM controller optimized for high-frequency power supplies. It operates with a maximum switching frequency of 1500 kHz and features a bipolar CDIP-16 package. The device includes an internal oscillator, error amplifier, and transistor driver capable of sourcing or sinking 200 mA. It supports step-down and step-up/down topologies with positive output configuration.
Feature Summary
- High-speed current-mode pulse width modulation architecture
- Integrated oscillator and error amplifier for precise regulation
- Robust transistor driver with 200 mA output capability
Applications
- High-frequency current-mode power supplies
- Isolated switching regulators
- Step-down and step-up/down converter topologies
Procurement Notes
Verify the manufacturer designation, as Microsemi and Microchip Technology are associated with this part number. Confirm the specific suffix (e.g., /883B) if military-grade reliability is required. Ensure the package type matches the CDIP-16 specification. Check for active status confirmation from authorized distributors to avoid obsolete stock.
Selection Notes
Select this component for applications requiring high-frequency operation up to 1500 kHz. The current-mode control offers improved transient response compared to voltage-mode alternatives. Consider the 200 mA drive strength for direct gate driving of power MOSFETs without external buffer stages in moderate-power designs.
Part Context
This component belongs to the SG1825 series of pulse width modulators. Variants such as SG1825CJ/883B indicate specific reliability grades or packaging options. The series is designed for robust performance in demanding power conversion environments, maintaining consistency in core functionality across different manufacturer designations.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with SG1825CJ variants from other manufacturers only if electrical parameters and pinouts are explicitly verified against official datasheets.
