| Allicdata Part #: | LT4250LCS8#TRPBF-ND |
| Manufacturer Part#: |
LT4250LCS8#TRPBF |
| Price: | $ 0.00 |
| Product Category: | Integrated Circuits (ICs) |
| Manufacturer: | Linear Technology/Analog Devices |
| Short Description: | IC CONTRLR HOTSWAP NEG 48V 8SOIC |
| More Detail: | Hot Swap Controller 1 Channel -48V 8-SOIC |
| DataSheet: |  LT4250LCS8#TRPBF Datasheet/PDF |
| Quantity: | 1000 |
| Moisture Sensitivity Level (MSL): | 1 (Unlimited) |
| Lead Free Status / RoHS Status: | Lead free / RoHS Compliant |
Specifications
| Programmable Features: | Current Limit, Latched Fault, OVP, UVLO |
| Base Part Number: | LT4250 |
| Feature Pins: | DRAIN, /PWRGD, OV, UV |
| Supplier Device Package: | 8-SOIC |
| Package / Case: | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type: | Surface Mount |
| Current - Supply: | 1.6mA |
| Operating Temperature: | 0°C ~ 70°C |
| Current - Output (Max): | -- |
| Voltage - Supply: | -80 V ~ 18 V |
| Series: | -- |
| Features: | Fault Timeout |
| Applications: | -48V |
| Internal Switch(s): | No |
| Number of Channels: | 1 |
| Type: | Hot Swap Controller |
| Moisture Sensitivity Level (MSL): | -- |
| Part Status: | Active |
| Lead Free Status / RoHS Status: | -- |
| Packaging: | Tape & Reel (TR) |
Description
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LT4250LCS8#TRPBF application field and working principle
LT4250LCS8#TRPBF is a power management integrated circuit (PMIC) from Linear Technology. It is a hot swap controller, which is used to control the power-up sequencing of equipment that includes large current power supplies. The LT4250LCS8#TRPBF is the five-channel version of Linear Technology’s LT4250 family of hot swap controllers. It provides five individually-controlled hot swap channels, each accepting unidirectional current. The device employs an over-current and over-voltage protection scheme as well as active discharge circuitry to optimize power up and power down sequencing.Principle of Operation
The LT4250LCS8#TRPBF is designed to provide controlled power up and power down sequencing of hot swap circuits. When a new load is applied or an existing load is removed, the device ramps up the inrush current to the load and then monitors it for an over-current condition. If the current exceeds the limit set by the user, the device latches off to protect the load, the power supply and other system components. The device includes circuitry to detect an over-voltage condition on the regulator output, which turns off the hot swap channel to prevent damage to the load. In addition, the device contains a switch and current limit circuitry to limit inrush current when powering up large loads.The device also contains two independent active discharge switches, which are used to actively discharge capacitive loads during power down. The user can either program the discharge resistance for slow discharge if desired or can set the device to automatically detect the size of the load capacitor and will actively discharge the load itself.Application Example
The LT4250LCS8#TRPBF is an ideal hot swap controller for use in data-center applications. In this application, hot swap sequences are necessary to prevent power supply inrush currents that could damage critical components. The LT4250LCS8#TRPBF can detect an over-current condition and take the appropriate action. It can also determine the size of the load capacitor and actively discharge it during power down. The device can also be used to power up multiple loads sequentially. This helps to reduce large inrush currents and makes the hot swap process more reliable. In addition, the device can be used to protect the power supply and other components from excessive current draw.Conclusion
The LT4250LCS8#TRPBF is a five-channel hot swap controller that provides powerful protection and sequencing capabilities. The device can be used to control the power-up sequencing of large current power supplies and to protect loads, power supplies and other components from over-current and over-voltage conditions. It can also be used to power up multiple loads sequentially and to actively discharge capacitive loads during power down. The LT4250LCS8#TRPBF is an ideal hot swap controller for use in data-center and other applications.The specific data is subject to PDF, and the above content is for reference
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