MC34652EF

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MC34652EF Application Fields and Working Principle

MC34652EF is a hot swap controller (HSC) from the Power Management Integrated Circuit (PMIC) family. It is used for system level protection and power control in hot-swappable systems. This device can reduce the amount of power wasted on long traces and pins that are connected to the hot-swappable card, and increase the card’s speed and reliability.

Application Fields

MC34652EF is primarily used in hot-swappable systems, such as System-on-Chip (SoC) or PCI Express (PCIe) based systems. Hot-swappings can occur when a card or slot is added or removed, or when a slot is powered on or off. In these cases, MC34652EF instantly powers up the system and enforces the correct voltage levels, while keeping the voltage rise and fall times below the required tolerances. MC34652EF also prevents accidental hot-swappings from occurring, by ensuring that the slots are powered off and non-operational when a card is removed or a power loss is detected.

MC34652EF is also used for power conservation and system level protection in other applications, such as satellites, battery-powered systems, and portable data acquisition systems. In these applications, MC34652EF can maximize battery life and system uptime by preventing hot-swappings and providing clean and accurate voltage levels.

Working Principle

MC34652EF controls the power supply of the system by monitoring the hot-swap card. Upon detection of a hot-swap operation, MC34652EF immediately disables power in all other systems, preventing them from drawing current. Afterwards, MC34652EF steps down the system voltage to a safe level to ensure that no current flows, and then slowly increases the voltage level back up again to the target level. During this time, MC34652EF monitors the voltage levels and changes them according to preset parameters.

MC34652EF also monitors the hot-swap card and its related components for any potential problems. If one of those components fails or if the voltage or current levels exceed the specified limits, MC34652EF immediately shuts down the power in the system. This ensures that no excess voltage or current is sent through the system and that no damage occurs.

The MC34652EF also features a number of additional features such as programmable soft-start, hardware settable output current limit, presets, and temperature monitor. These features make MC34652EF an excellent choice for hot-swappable systems, as they help to maximize system uptime and protect against accidental power surges or other malfunctions.

Conclusion

MC34652EF is an advanced PMIC hot swap controller that is designed to maximize system uptime and protect against accidental power surges. By monitoring the voltage and current levels of the hot-swap card, MC34652EF can enable secure and fast hot-swaps, and also prevent accidental hot-swappings from occurring. Additionally, MC34652EF has a number of additional features that allow for greater control and system level protection. In short, MC34652EF is an excellent option for hot-swappable systems.

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