LT1641-1CS8#PBF

Hot Swap Controllers Overview

The LT1641-1CS8#PBF is a positive high voltage hot swap controller manufactured by Analog Devices Inc. It operates within a supply voltage range of 9V to 80V and features a single channel configuration. The device utilizes an 8-SOIC surface-mount package with an operating temperature range of -40°C to +85°C for the industrial grade variant, though commercial variants may differ. Key electrical characteristics include a supply current of approximately 2 mA and programmable current limiting with fault timeout capabilities.

Hot Swap Controllers Feature Summary

• Integrates programmable foldback current limiting that dynamically adjusts sense resistor voltage drop to reduce power dissipation during faults.
• Provides high-side gate drive capable of delivering at least 10V to standard N-channel MOSFETs when input voltage exceeds 20V.
• Includes under-voltage lockout and over-voltage detection via the ON pin with hysteresis to prevent false triggering.

Hot Swap Controllers Applications

• Electronic circuit breaker implementations
• Industrial alarm system power protection
• Power module input protection

Hot Swap Controllers Procurement Notes

Verify the specific suffix designation carefully, as LT1641-1 variants often denote latch-off behavior distinct from auto-retry models. Confirm the temperature grade matches the application requirements, as commercial and industrial versions share similar part numbers but differ in operating ranges. Ensure the #PBF suffix indicates RoHS compliance if required by the manufacturing process.

Hot Swap Controllers Selection Notes

Select this component when designing systems requiring robust protection against inrush currents and short circuits in high-voltage environments. The programmable nature of the current limit allows customization based on the connected load's surge characteristics. Consider the external MOSFET selection to ensure compatibility with the internal gate driver's voltage levels and switching speed requirements.

Hot Swap Controllers Part Context

This component belongs to the LT1641 family of positive high voltage hot swap controllers. It is designed to protect downstream circuitry during insertion or removal from live backplanes. The family includes variants with different fault response behaviors, such as latch-off versus auto-retry, catering to diverse system reliability strategies.

Hot Swap Controllers Replacement Considerations

LT1641-2CS8#PBF serves as a functional alternative with auto-retry behavior instead of latch-off. LT1641CS8#PBF is a related controller in the same series. Verify pinout compatibility and fault response logic before substituting to ensure system safety protocols remain intact.