ChipApex | Global Electronic Components Supplier
SG1843Y
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC REG CTRLR BUCK 8CDIP
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：7.6V ~ 30V
- Frequency - Switching：1Hz ~ 500kHz
- Duty Cycle (Max)：95%
- Synchronous Rectifier：No
- Clock Sync：No
- Serial Interfaces：-
- Control Features：-
- Operating Temperature：-55°C ~ 125°C (TA)
- Mounting Type：Through Hole
- Package / Case：8-CDIP (0.300", 7.62mm)
- Supplier Device Package：8-CDIP
- Grade：-
- Qualification：-
Download product information
Overview
The SG1843Y is a high-reliability isolated switching regulator controller from Microchip Technology, designed for current-mode PWM applications. It utilizes a flyback topology and supports a switching frequency range of 100 Hz to 500 kHz with a maximum duty cycle of 100%. The device features a CDIP-8 through-hole package and operates within a temperature range of -55°C to +125°C. Key electrical parameters include a 50 ns rise/fall time, 11 mA operating supply current, and output currents of 200 mA or 1 A depending on configuration.
Feature Summary
- Current-mode PWM control architecture for stable regulation
- High-reliability isolated design suitable for demanding environments
- Flyback topology implementation capability
- Totem pole output stage configuration
Applications
- Off-line fixed frequency switching power supplies
- High-reliability isolated switching regulators
- Military and aerospace electronic systems
- Industrial power management units
Procurement Notes
Verify the specific suffix (e.g., -883B) against official datasheets to confirm qualification level and performance specifications. Confirm that the CDIP-8 package matches the target PCB footprint. Ensure the manufacturer source is authorized to guarantee component authenticity and traceability for critical applications.
Selection Notes
Select this component when current-mode control is required for flyback converters. Verify that the 100 Hz to 500 kHz frequency range aligns with system requirements. Consider the -55°C to +125°C operating range for environmental suitability. Ensure the 100% maximum duty cycle meets the transformer design constraints.
Part Context
The SG1843Y belongs to the SG1842/43 family of control ICs, which provide comprehensive features for implementing off-line switching power supplies. This family is characterized by its robustness and suitability for high-reliability applications requiring isolated regulation and precise current-mode control.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Consult official Microchip Technology resources for qualified alternatives or cross-reference options.
