SKYWORKS SI3459A-B02-IMR
| Manufacturer | |
| MPN | SI3459A-B02-IMR |
| LCSC Part # | C20030195 |
| Packaging | QFN-56(8x8) |
| Customer # | |
| Key Attributes | QFN-56(8x8) Power Over Ethernet (PoE) Controllers RoHS |
| Datasheet |  SKYWORKS SI3459A-B02-IMR |
Products Specifications
| Type | Description | |
|---|---|---|
| Category | Integrated Circuits (ICs)/Power Management (PMIC)/Power Over Ethernet (PoE) Controllers | |
| Manufacturer | SKYWORKS | |
| Packaging | QFN-56(8x8) | |
| Features | Built-in LDO;Overvoltage protection;Undervoltage Protection;Thermal Protection;Overcurrent Protection;PD detection and disconnect identification;Dual event classification detection |
| Type | Description | |
|---|---|---|
| Category | Integrated Circuits (ICs)/Power Management (PMIC)/Power Over Ethernet (PoE) Controllers | |
| Manufacturer | SKYWORKS |
| Type | Description | |
|---|---|---|
| Packaging | QFN-56(8x8) | |
| Features | Built-in LDO;Overvoltage protection;Undervoltage Protection;Thermal Protection;Overcurrent Protection;PD detection and disconnect identification;Dual event classification detection |
Introduction
The Si3459 is a fully programmable eight-port power management controller for IEEE 802.3-compliant Power Sourcing Equipment (PSE). Designed for PSE endpoints (switches), it integrates eight independent ports, each with IEEE-required Powered Device (PD) detection and classification. The Si3459 features a fully programmable architecture with DC detection algorithm for PD disconnect, a robust multi-point detection algorithm, software-configurable per-port current and voltage monitoring, and programmable current limiting for IEEE 802.3at compliance. Intelligent protection circuitry includes input undervoltage detection, output current limiting, and short-circuit protection. The Si3459 is controlled by a host processor via a three-wire I²C-compatible serial interface. Separate serial data input and output pins enable high-voltage isolation through external isolators. An interrupt pin alerts the host processor to various status and fault conditions. The device also supports pin-programmable auto mode for autonomous operation without a host processor. The Si3459 further integrates an on-chip DC-DC converter that generates a digital voltage rail from the PoE voltage, enabling single-rail power supply operation.
Features
- Eight-port Power Sourcing Equipment (PSE) controller
- Compliant with IEEE 802.3at Type I and II
- Port priority shutdown control
- Enhanced features for maximum design flexibility:
- Per-port current and voltage monitoring
- PoE+ support with programmable current limit
- Multi-point detection
- Programmable power MOSFET gate drive control
- Configurable watchdog timer for fail-safe operation
- Maskable interrupt pin
- Comprehensive fault protection including:
- Power supply undervoltage lockout
- Output current limiting and short-circuit protection
- Thermal overload detection
- Pin-programmable auto mode
- Extended operating temperature range: –40 to +85℃
- 56-pin QFN package (RoHS compliant)
- On-chip DC-DC converter for single-rail power supply operation
Applications
- IEEE Power Sourcing Equipment (PSE)
- PoE switches
- IP phone systems
- Smart grid switches
- Ruggedized and industrial switches
| Qty | Unit Price(Reference Only) | Total Amount |
|---|---|---|
| 1+ | $ 8.8173 | $ 8.82 |
| 200+ | $ 3.519 | $ 703.80 |
| 500+ | $ 3.4015 | $ 1700.75 |
| 1,250+ | $ 3.3428 | $ 4178.50 |
Standard Packaging1250/Full Reel | ||
Products Specifications
| Type | Description | |
|---|---|---|
| Category | Integrated Circuits (ICs)/Power Management (PMIC)/Power Over Ethernet (PoE) Controllers | |
| Manufacturer | SKYWORKS | |
| Packaging | QFN-56(8x8) | |
| Features | Built-in LDO;Overvoltage protection;Undervoltage Protection;Thermal Protection;Overcurrent Protection;PD detection and disconnect identification;Dual event classification detection |
| Type | Description | |
|---|---|---|
| Category | Integrated Circuits (ICs)/Power Management (PMIC)/Power Over Ethernet (PoE) Controllers | |
| Manufacturer | SKYWORKS |
| Type | Description | |
|---|---|---|
| Packaging | QFN-56(8x8) | |
| Features | Built-in LDO;Overvoltage protection;Undervoltage Protection;Thermal Protection;Overcurrent Protection;PD detection and disconnect identification;Dual event classification detection |
Introduction
The Si3459 is a fully programmable eight-port power management controller for IEEE 802.3-compliant Power Sourcing Equipment (PSE). Designed for PSE endpoints (switches), it integrates eight independent ports, each with IEEE-required Powered Device (PD) detection and classification. The Si3459 features a fully programmable architecture with DC detection algorithm for PD disconnect, a robust multi-point detection algorithm, software-configurable per-port current and voltage monitoring, and programmable current limiting for IEEE 802.3at compliance. Intelligent protection circuitry includes input undervoltage detection, output current limiting, and short-circuit protection. The Si3459 is controlled by a host processor via a three-wire I²C-compatible serial interface. Separate serial data input and output pins enable high-voltage isolation through external isolators. An interrupt pin alerts the host processor to various status and fault conditions. The device also supports pin-programmable auto mode for autonomous operation without a host processor. The Si3459 further integrates an on-chip DC-DC converter that generates a digital voltage rail from the PoE voltage, enabling single-rail power supply operation.
Features
- Eight-port Power Sourcing Equipment (PSE) controller
- Compliant with IEEE 802.3at Type I and II
- Port priority shutdown control
- Enhanced features for maximum design flexibility:
- Per-port current and voltage monitoring
- PoE+ support with programmable current limit
- Multi-point detection
- Programmable power MOSFET gate drive control
- Configurable watchdog timer for fail-safe operation
- Maskable interrupt pin
- Comprehensive fault protection including:
- Power supply undervoltage lockout
- Output current limiting and short-circuit protection
- Thermal overload detection
- Pin-programmable auto mode
- Extended operating temperature range: –40 to +85℃
- 56-pin QFN package (RoHS compliant)
- On-chip DC-DC converter for single-rail power supply operation
Applications
- IEEE Power Sourcing Equipment (PSE)
- PoE switches
- IP phone systems
- Smart grid switches
- Ruggedized and industrial switches
Compliance & Export Codes
| Type | Details |
|---|---|
| RoHS | |
| ECCN | EAR99 |
| CNHTS | 8542319090 |
| USHTS | |
| TARIC | |
| CAHTS | |
| BRHTS | |
| INHTS | |
| MXHTS |
| Type | Details |
|---|---|
| RoHS | |
| ECCN | EAR99 |
| CNHTS | 8542319090 |
| USHTS | |
| TARIC |
| Type | Details |
|---|---|
| CAHTS | |
| BRHTS | |
| INHTS | |
| MXHTS | |