LT4220CGN#TRPBF

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The LT4220CGN#TRPBF is a component that fits into the Power Management IC (PMIC) family, specifically Hot Swap Controllers. The component consists of a low power-loss hot swap controller intended for powering up and powering down hot-plugged and high inrush load current applications like FPGAs, memory and power supplies. The LT4220CGN#TRPBF allows for the seamless connection or disconnection of the heavily loaded electrical system it’s applied to, whilst maintaining the performance and reliability of the system.

The LT4220CGN#TRPBF has a number of application fields such as Servers and Routers, PoE Systems, Network Switches, Optical Data Links, Communications Test Equipment, Industrial Controls and Automation. The component can be used for both low and high voltage applications, with a typical input voltage rating of 5V to 24V and an output voltage of 2V to 24V. The maximum lead temperature rating for the component is 125°C at commercial grade. The current rating of the component is usually 1.5A to 15A, and it often contains a soft start overshoot protection feature.

The working principle of the LT4220CGN#TRPBF is as follows: The controller starts up the regulated output voltage using the current-mode SOFTSTART circuit, in which a resistor-capacitor (RC) network and zero current feedforward circuit bypasses the error amplifier to control the switching oscillator. This reduces the inrush current of a heavily loaded system. Once the SOFTSTART voltage exceeds a predetermined level the error amplifier takes over and continues controlling the output voltage. During normal operation the error amplifier controls the switching cluster of a pulse-width modulation circuit connected to the power switch. The entire process is monitored for fault conditions like output overvoltage and overcurrent. Additionally, short-circuit protection is provided by discharging the high side of the power switch with a small discharge transistor and voltage clamp circuit.

The LT4220CGN#TRPBF features a low power-loss circuit to minimize power dissipation. During normal operation, the controller has a typical quiescent current of 3.2mA. This is reduced to typically 0.8mA in the small signal power-down mode. At the same time, the robust wide voltage transient immunity of 15V coupled with the fast TPHOFS (Typical Propagation Hold-off Synchronization), ensures reliable switching with no damage to the IC. It also has a relay output control circuit to generate a feedback signal in the load at the output voltage. This can be used to control an external voltage controlled relay that can disconnect the load should any faults occur.

In conclusion, the LT4220CGN#TRPBF is an excellent component for hot-plugging applications where reliable switching and power-loss performance is required. The wide input and output voltage range coupled with an integrated overcharge and overcurrent protection makes it an ideal choice for industrial and networking applications.

The specific data is subject to PDF, and the above content is for reference