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Product Detailed Parameters
- Description：POWER SUPPLY SUPPORT CIRCUIT, FI
- Series：-
- Mfr：Unitrode
- Package：Bulk
- Type：Hot Swap Controller
- Number of Channels：1
- Internal Switch(s)：No
- Applications：General Purpose
- Features：UVLO
- Programmable Features：Auto Retry, Circuit Breaker, Current Limit, Fault Timeout, Latched Fault
- Voltage - Supply：-48V
- Current - Output (Max)：-
- Operating Temperature：-40°C ~ 85°C
- Current - Supply：1 mA
- Mounting Type：Through Hole
- Package / Case：8-DIP (0.300", 7.62mm)
- Supplier Device Package：8-PDIP
- Grade：-
- Qualification：-
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Overview
The UCC2921N is a single-channel hot swap voltage controller manufactured by Unitrode, now part of Texas Instruments. It operates within an 8.5 V to 10.5 V supply range and draws 1 mA of quiescent current. Designed for through-hole mounting in an 8-DIP package, it supports operation from -40°C to +85°C. The device manages power insertion without internal switches, providing essential protection features for system integrity during live circuit connections.
Feature Summary
- Provides latched fault protection with auto-retry capabilities
- Includes adjustable current limiting and circuit breaker functions
- Features fault timeout mechanisms to prevent damage during abnormal conditions
Applications
- Server backplane power management
- Telecommunications equipment power distribution
- Industrial control systems requiring safe module insertion
Procurement Notes
Verify the manufacturer designation carefully, as Unitrode products are often branded under Texas Instruments or Rochester Electronics in current catalogs. Confirm the specific suffix indicates the 8-pin DIP package variant. Ensure compatibility with your board layout requirements for through-hole assembly before finalizing orders.
Selection Notes
Select this component when a robust, single-channel solution for managing hot insertion events is required. It is suitable for applications needing precise fault handling without integrated power switches. Consider the DIP package constraint if surface-mount space is limited but through-hole reliability is prioritized.
Part Context
This component belongs to the UCC2921 series of hot swap controllers. It serves as a critical interface between power sources and load circuits, ensuring safe power-up sequences. The Unitrode branding reflects its heritage in analog power management solutions now maintained by Texas Instruments.
Replacement Considerations
Check for UCC2921D as a surface-mount alternative. Verify pinout compatibility and thermal performance differences between DIP and SOIC packages before substitution.
