LT1241CS8#PBF

Frequency - Switching:	500kHz
Base Part Number:	LT1241
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Operating Temperature:	0°C ~ 100°C (TJ)
Control Features:	Frequency Control
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	48%
Series:	--
Voltage - Supply (Vcc/Vdd):	8.2 V ~ 25 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive, Isolation Capable
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tube

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LT1241CS8#PBF DC DC Switching Controller Application Field and Working Principle

The LT1241CS8#PBF is a unique DC DC switching controller, offering a wide range of high performance features such as high efficiency, fast transient response and low quiescent current. It is suitable for high current DC/DC applications such as server/communications equipment, automotive systems and point-of-load induction heating. The LT1241CS8#PBF integrates a precision voltage reference, a high speed voltage comparator and control timing circuitry that follow a programmable switching frequency. It supports a wide selection of operating parameters allowing for compensation and adjustment of the circuit for maximum performance. It also features soft-start, current limit and over-temperature protection.The LT1241CS8#PBF is one of the few DC/DC controllers available with an internal high power control transistor, capable of supplying up to 100A of output current. This is a critical advantage in high load applications, providing better thermal capabilities than alternative solutions.

General Applications

The LT1241CS8#PBF is suitable for a wide range of DC/DC switching controller applications. It can be used for various high current DC/DC applications such as server/communications equipment, automotive systems and point-of-load induction heating.

Working Principle of the LT1241CS8#PBF

The working principle of the LT1241CS8#PBF is based on the fact that its internal control circuitry follows a programmable switching frequency. The controller receives power from the input power supply and then voltage output flows to the controller’s output load. The output load is regulated through the feedback loop.The feedback loop is composed of an internal high-speed voltage comparator and a precision voltage reference. This combination allows for precise voltage regulation by continuously monitoring the output voltage and quickly reacting to any changes. The precise voltage reference also allows the controller to accurately track changes in the input voltage, ensuring the output voltage stays at the desired level.The LT1241CS8#PBF also features soft-start and current limit protection to ensure the output current will stay below the set limit. The controller also features over-temperature protection to prevent damage due to high-temperature operation.

Conclusion

The LT1241CS8#PBF is a versatile DC/DC switching controller designed to meet the demanding requirements of high current power systems. It integrates an internal high power control transistor which is able to provide up to 100A of output current at an efficiency of over 90%. It also features many advanced features such as soft-start and current limit protection, as well as precise voltage regulation through an internal comparator and voltage reference. The LT1241CS8#PBF is an ideal solution for many applications such as server/communications equipment, automotive systems and point-of-load induction heating.

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