 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
MAX5945CAX Datasheet(PDF) 1 Page - Maxim Integrated Products |
|
||||||||||||||||||||||||||||||
MAX5945CAX Datasheet(HTML) 1 Page - Maxim Integrated Products |
|
|
1 / 44 page  General Description The MAX5945 quad network power controller is designed for use in IEEE 802.3af-compliant power-sourcing equip- ment (PSE). The device provides power devices (PD) dis- covery, classification, current-limit, and both DC and AC load disconnect detections. The MAX5945 can be used in either endpoint PSE (LAN switches/routers) or midspan PSE (power injector) applications. The MAX5945 is pin and function compatible with LTC4259A. The MAX5945 can operate autonomously or be con- trolled by software through an I2C*-compatible inter- face. Separate input and output data lines (SDAIN and SDAOUT) allow usage with optocouplers. The MAX5945 is a slave device. Its four address inputs allow 16 unique MAX5945 addresses. A separate INT output and four independent shutdown inputs (SHD_) allow fast response from a fault to port shutdown. A RESET input allows hardware reset of the device. A special watchdog feature allows the hardware to grace- fully take over control if the software crashes. A cadence timing feature allows the MAX5945 to be used in midspan systems. The MAX5945 is fully software configurable and program- mable. A class-overcurrent detection function enables system power management to detect if a PD draws more current than the allowable amount for its class. Other fea- tures are input under/overvoltage lockout, overtempera- ture protection, output-voltage slew-rate limit during startup, power-good, and fault status. The MAX5945’s programmability includes gate-charging current, current- limit threshold, startup timeout, overcurrent timeout, autorestart duty cycle, PD disconnect AC detection threshold, and PD disconnect detection timeout. The MAX5945 is available in a 36-pin SSOP package and is rated for both extended (-40°C to +85°C) and commercial (0°C to +70°C) temperature ranges. Applications Power-Sourcing Equipment (PSE) Power-Over-LAN/Power-Over-Ethernet Switches/Routers Midspan Power Injectors Features ♦ IEEE 802.3af Compliant ♦ Pin and Function Compatible with LTC4259A ♦ Controls Four Independent, -48V-Powered Ethernet Ports in Either Endpoint or Midspan PSE Applications ♦ Wide Digital Power Input, VDIG, Common-Mode Range: VEE to (AGND + 7.7V) ♦ PD Violation of Class Current Protection ♦ PD Detection and Classification ♦ Provides Both DC and AC Load Removal Detections ♦ I2C-Compatible, 3-Wire Serial Interface ♦ Fully Programmable and Configurable Operation Through I2C Interface ♦ Current Foldback and Duty-Cycle- Controlled/Programmable Current Limit ♦ Short-Circuit Protection with Fast Gate Pulldown ♦ Direct Fast Shutdown Control Capability ♦ Programmable Direct Interrupt Output ♦ Watchdog Mode Enable Hardware Graceful Takeover Quad Network Power Controller for Power-Over-LAN ________________________________________________________________ Maxim Integrated Products 1 36 35 34 33 32 31 30 29 28 27 26 25 24 23 1 2 3 4 5 6 7 8 9 10 11 12 13 14 OSC_IN AUTO OUT1 GATE1 SENSE1 OUT2 GATE4 GATE2 SENSE2 VEE OUT3 GATE3 SENSE3 OUT4 DET4 DET3 DET2 DET1 A0 A1 A2 A3 SDAIN SDAOUT SCL MIDSPAN SSOP TOP VIEW MAX5945 22 21 20 19 15 16 17 18 SENSE4 AGND VDD DGND RESET INT SHD1 SHD2 SHD3 SHD4 Pin Configuration 19-3428; Rev 1; 9/05 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. EVALUATION KIT AVAILABLE Ordering Information PART TEMP RANGE PIN-PACKAGE MAX5945CAX** 0°C to +70°C 36 SSOP MAX5945EAX -40°C to +85°C 36 SSOP *Purchase of I2C components from Maxim Integrated Products, Inc. or one of its sublicensed Associated Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips. **Future product—contact factory for availability. Typical Operating Circuits appear at end of data sheet. |
Similar Part No. - MAX5945CAX |
|
Similar Description - MAX5945CAX |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
