The LTC4238 is a high voltage high current Hot Swap controller that allows a board to be safely inserted and removed from a live backplane. Dual 12V gate drive is well suited for high power application to either share safe operating areas across parallel MOSFETs or support a 2-stage start-up that first charges the load capacitance followed by enabling a low on-resistance path to the load.
Key Features and Benefits
● Drive two gates with configurable parallel, staged start or single MOSFET modes to relax MOSFET requirements and simplify MOSFET selection.
● Use FET-Bad monitor to continuously assess key MOSFET vital signs to increase reliability and prevent catastrophic failure.
● Parallel multiple LTC4238s to address very high current designs (>>3kW).
Applications
● Communications/5G: hot swappable backplanes or cards in 12V, 24V and 48V computer/server applications
● Industrial Automation: IPCs, factory/office automation, elevator control
● Instrumentation: ECB for medical equipment, patient monitoring systems
Evaluation Board
The LTC4238 can be evaluated with the DC2914A.
Block Diagrams and Tables
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