PMIC - Power Over Ethernet (PoE) Controllers 20-VQFN Exposed Pad -40°C~85°C 2.8V~57V 0.8mm 350kHz IC POE PD LOW EMI SW REG 20VQFN
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Dec 3, 2021
Zona Hutt
PMIC - Power Over Ethernet (PoE) Controllers 20-VQFN Exposed Pad -40°C~85°C 2.8V~57V 0.8mm 350kHz IC POE PD LOW EMI SW REG 20VQFN
The Si3402 integrates all power management and control functions required in a Power-over-Ethernet (PoE) powered device (PD) application. This article will unlock its datasheet, pinout, feature and more about Si3402. Welcome your RFQ!
SI3402-B-GM
SI3402 Pinout
SI3402 Symbol
SI3402 Footprint
SI3402 3D Model
The Si3402 integrates all power management and control functions required in a Power-over-Ethernet (PoE) powered device (PD) application. The Si3402 converts the high voltage supplied over the 10/100/1000BASE-T Ethernet connection into a regulated, low-voltage output supply. The optimized architecture of the Si3402 minimizes the solution footprint, reduces external BOM cost, and enables the use of low-cost external components while maintaining high performance. The Si3402 integrates the required diode bridges and transient surge suppressor, thus enabling the direct connection of the IC to the Ethernet RJ-45 connector. The switching power FET and all associated functions are also integrated. The integrated switching regulator supports isolated (flyback) and nonisolated (buck) converter topologies. The Si3402 is available in a low-profile, 20-pin, 5 x 5 mm QFN package.
Pin-compatible replacement for the obsolete Si3402 -A
IEEE 802.3 standard-compliant solution, including pre-standard (legacy) PoE support
Highly-integrated IC enables compact solution footprints
l Minimal external components
l Integrated diode bridges and transient surge suppressor
l Integrated switching regulator controller with on-chip power FET
l Integrated dual current-limited hot-swap switch
Programmable classification circuit
Incorporates switcher EMI reduction techniques
Supports non-isolated and isolated switching topologies
Comprehensive protection circuitry
l Transient overvoltage protection
l Undervoltage lockout
l Early power-loss indicator
l Thermal shutdown protection
l Foldback current limiting
Low-profile 5 x 5 mm 20-pin QFN n RoHS -compliant
Voice over IP telephones and adapters
Wireless access points
Security cameras
Point-of-sale terminals
Internet appliances
Network devices
High power applications
The SI3402 Schematic is given below:
SI3402 Application Circuit-Isolated Flyback Topology
SI3402 Application Circuit-Non-Isolated Buck Topology
The Si3402 consists of two major functions: a hot-swap controller/interface and a complete pulse-width-modulated switching regulator (controller and power FET). The following figure shows the functional diagram of Si3402.
SI3402 Functional Block Diagram
Silicon Labs SI3402-B-GM technical specifications, attributes, parameters and parts with similar specifications to Silicon Labs SI3402-B-GM.
Silicon Labs SI3402-B-GM technical specifications, attributes, parameters and parts with similar specifications to Silicon Labs SI3402-B-GM.
| Product Attribute | Attribute Value | |
|---|---|---|
| Factory Lead Time | 8 Weeks | |
| Package / Case | 20-VQFN Exposed Pad | |
| Surface Mount | YES | |
| Operating Temperature | -40°C~85°C | |
| Packaging | Tray | |
| Published | 1999 | |
| Part Status | Active | |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | |
| Number of Terminations | 20Terminations | |
| ECCN Code | EAR99 | |
| Type | Controller (PD), DC/DC | |
| Max Power Dissipation | 17W |
| Product Attribute | Attribute Value | |
|---|---|---|
| Voltage - Supply | 2.8V~57V | |
| Terminal Position | QUAD | |
| Peak Reflow Temperature (Cel) | 260 | |
| Number of Functions | 1Function | |
| Terminal Pitch | 0.8mm | |
| Frequency | 350kHz | |
| Time@Peak Reflow Temperature-Max (s) | 30 | |
| JESD-30 Code | S-XQCC-N20 | |
| Input Voltage-Nom | 5V | |
| Number of Channels | 1Channel | |
| Operating Supply Current | 2mA | |
| Output Current-Max | 0.68A |
| Product Attribute | Attribute Value | |
|---|---|---|
| Control Technique | PULSE WIDTH MODULATION | |
| Nominal Input Voltage | 57V | |
| Switcher Configuration | BUCK | |
| Internal Switch(s) | Yes | |
| Standards | 802.3at (PoE+), 802.3af (PoE) | |
| Auxiliary Sense | No | |
| Length | 5mm | |
| Height Seated (Max) | 0.9mm | |
| Width | 5mm | |
| RoHS Status | RoHS Compliant |
SI3402 Package
Silicon Labs (NASDAQ: SLAB) is a leading provider of silicon, software and system solutions for the Internet of Things, Internet infrastructure, industrial control, consumer and automotive markets. Resolving the electronics industry's toughest problems, providing customers with significant advantages in performance, energy savings, connectivity, and design simplicity. Backed by world-class engineering teams with unsurpassed software and mixed-signal design expertise, Silicon Labs empowers developers with the tools and technologies they need to advance quickly and easily from initial idea to final product.
Download datasheets and manufacturer documentation for Silicon Labs SI3402-B-GM.
Download datasheets and manufacturer documentation for SI3402-B-GM
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