LTC4255 - Quad Network Power Controller with I²C Compatible Interface
Features
- Controls Four Independent –48V Power Channels
- Each Channel has Separate Relay Drivers, ON/OFF Control, Short-Circuit Protection with Current Foldback, Open-Circuit Detection,
- and Power Good Indication
- Programmed via I²C™ Compatible Interface
- Five Bit Programmable Digital Address Allows Control of up to 32 LTC4255s (128 Channels)
- Interrupt on FAULT Output can be used to Eliminate Software Polling
- Programmable Current Limit and Open-Circuit Duration Periods
- Programmable Latchoff or Autoretry after Short-Circuit Faults
- Programmable Autoretry Duty Cycle
Typical Application
Description
The LTC4255 is a quad –48V network power controller with independent relay drivers and I²C compatible interface. Each channel can be turned on and off via software control, while providing short-circuit protection, open-circuit detection, and power good indication. The shortcircuit protection includes a current foldback feature to reduce power dissipation in the switch during shorts and start-up.
The serial interface allows up to 128 channels to be controlled with only two digital lines. A FAULT output can be used as an interrupt line to eliminate fault detection by software polling.
External switches and current sense resistors allow easy scaling of current and power dissipation levels and provide the maximum protection against voltage and current spikes.
The LTC4255 is available in the 28-pin SSOP package.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC4255CG#PBF | SSOP-28 | G | C | 05-08-1640 (G28) | Yes |
| LTC4255CG#TRPBF | SSOP-28 | G | C | 05-08-1640 (G28) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC4255CG#PBF | SSOP-28 | C | $7.25 | $5.90 | Yes | |
| LTC4255CG#TRPBF | SSOP-28 | C | $6.00 | Yes | ||
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.Click here to view our complete list of demo boards
Applications
- IP Phone Systems
- DTE Power Distribution
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
