SI3482-A01-GM Silicon Laboratories Inc, SI3482-A01-GM Datasheet
SI3482-A01-GM
Specifications of SI3482-A01-GM
Available stocks
Related parts for SI3482-A01-GM
SI3482-A01-GM Summary of contents
Page 1
... Typically, not all ports are used at full power; so, a smaller power supply in the range per port can be used along with the Si3482 power management controller. The Si3482 is a power manager intended for use with the Si3452/3 Power over Ethernet (PoE) controllers for power management ports with three power sources ...
Page 2
... Si3482 Functional Block Diagram 2 Rev. 0.1 ...
Page 3
... System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.7. Port Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4.8. Power Supply Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 4.9. Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4.10. Return Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 5. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 6. Package Outline: 24-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 7. PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 8. Solder/Paste Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 9. Top Marking Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 10. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38 Rev. 0.1 Si3482 Page 3 ...
Page 4
... Si3482 1. Electrical Specifications Table 1. Recommended Operating Conditions Description Symbol Operating Temperature T Range V V Supply Voltage DD DD Table 2. Absolute Maximum Ratings Parameter Ambient Temperature under Bias Storage Temperature Voltage on any I/O with Respect to GND Voltage on V with DD Respect to GND Note: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the devices at those or any other conditions above those indicated in the operation listings of this specification is not implied ...
Page 5
... BIT SAMPLING Test Conditions T T CKH CKL Bit 5 Bit 4 Bit 3 Bit 2 Bit 5 Bit 4 Bit 3 Bit 2 T SCH Figure 1. SPI Timing Diagram Figure 2. UART Timing Diagram Rev. 0.1 Si3482 Min Max Units 84 — — ns — 168 ns — 168 ns 210 — ns 210 — — ...
Page 6
... Power supplies may be inserted into bays. The Si3482 supports a system with up to three bays. Power supplies may be inserted or removed from the bays at any time. Each bay provides a signal to the Si3482 that indicates if a power supply is present in the bay. The outputs of the power supplies are ganged together to provide a single power source for the system ...
Page 7
... Most power supplies can tolerate a limited amount of overload for a short duration. The host specifies the overload limit of the power supplies to the Si3482 system overload is less than the overload limit, the Si3482 turns off ports, one at a time in priority order, until the system is no longer overloaded system overload is greater than the overload limit (severe overload), the Si3482 immediately turns off all low-priority ports ...
Page 8
... If the PSLCT pin is tied low, then the Si3482 uses the SPI interface to communicate with the host MCU. The Si3482 is an SPI slave device. Therefore, it receives data on the MOSI pin and sends data on the MISO pin. The host MCU drives the NSS and SCK pins. ...
Page 9
... Serial Packet Protocol The Si3482 contains the Power Manager component and the interface to the Power Manager is a collection of routines known as the Power Manager application programming interface (API). The Power Manager API is described later in this manual. The host MCU contains a User Interface component, which calls the routines in the Power Manager API to get status information and configure and control the Power Manager ...
Page 10
... Si3482 3.1. Packet Format A packet is a sequence of fields sent together as a unit. Figure 7 shows the SPP packet format. Start Routine Data Length Data Checksum Each field is a single byte except for the Data field. The Data field may be from zero to 255 bytes. ...
Page 11
... GetPortPowerLimit() SetPowerSupplyStatus() GetPowerSupplyStatus() GetEvents() Symbol RTN_GETPORTPRIORITYSTATUS RTN_GETPORTPOWERCONSUMED RTN_GETPORTPOWERGRANTED RTN_GETPORTPOWERREQUESTED RTN_GETPORTPOWERAVAILABLE RTN_RESETSYSTEM RTN_RESTOREFACTORYDEFAULTS RTN_SETPORTCONTROL RTN_ADJUSTPORTPOWER RTN_SETPOWERPROVIDED RTN_GETPOWERPROVIDED RTN_SETRESERVEDPOWER RTN_GETRESERVEDPOWER RTN_SETOVERLOADLIMIT RTN_GETOVERLOADLIMIT RTN_SETGRANTINGPOLICY RTN_GETGRANTINGPOLICY RTN_SETRETRYPOLICY RTN_GETRETRYPOLICY RTN_SETPOWERLOCATION RTN_GETPOWERLOCATION RTN_SETPORTENABLE RTN_GETPORTENABLE RTN_SETPORTCAPABILITY RTN_GETPORTCAPABILITY RTN_SETPORTPRIORITY RTN_GETPORTPRIORITY RTN_SETPORTPOWERLIMIT RTN_GETPORTPOWERLIMIT RTN_SETPOWERSUPPLYSTATUS RTN_GETPOWERSUPPLYSTATUS RTN_GETEVENTS Rev. 0.1 Si3482 Value ...
Page 12
... The DataLength field specifies the number of bytes in the Data field. The number of bytes may be from zero to 255. 3.1.5. Data Field The Data field is used to pass data to and from the Si3482. The Data field may contain four different types of data: Parameters ...
Page 13
... PowerSupply OverloadLimit RetryPolicy Port Enable Port Port Capability Port Port Priority Port Port PowerLimit Port PowerSupply Status PowerSupply Rev. 0.1 Si3482 Parameters in Received Packet Parm8 Parm32* PowerAvailable Result Result Result Result PowerProvided Result ReservedPower Result OverloadLimit Result GrantingPolicy Result RetryPolicy Result ...
Page 14
... Si3482 3.1.5.2. System Information Format The System Information format of the Data field is used to return system information to the client. System information is returned after calling the GetSystemInfo() routine. Start Routine Data Length Data Checksum Figure 10. System Information Format The System Information format has a PowerManagerVersion field followed by a PlatformSupportVersion field. Both of these fields are eight bytes long and contain a version string that is a zero-terminated ASCII string ...
Page 15
... Si3482 backs up the configuration to internal flash memory. While the Si3482 is writing to flash memory, it cannot send or receive packets on the host interface host MCU sends a packet to the Si3482 while it is backing up the configuration, the packet is lost host MCU does not receive a packet back within one second, the host MCU should resend the original packet ...
Page 16
... Si3482 4. Power Manager API User Interface components call the routines in the Power Manager API to get status information and configure and control the Power Manager. The Power Manager API has routines for: Management System Status Port Status System Control ...
Page 17
... Port Status PORT_EVENT Power Supply Status Error Code ERROR_EVENT Information Code INFO_EVENT Table 9. System Status Value 0 –1 STATUS_SYSTEM_INIT_FAIL –2 STATUS_SYSTEM_UNDER_VOLT –3 STATUS_SYSTEM_OVER_TEMP –4 STATUS_SYSTEM_COMM_LOST Rev. 0.1 Si3482 Parm2 (not used) Port Number Power Supply Number (error specific) (not used) Symbol STATUS_SYSTEM_OK 17 ...
Page 18
... Si3482 4.2.2. GetSystemInfo Get information about the system. Prototype: void GetSystemInfo ( SYSINFO *SystemInfo ) Parameters: SystemInfo Return Value: None A SYSINFO structure has the following layout: typedef struct { char *PowerManagerVersion; char *PlatformSupportVersion; } SYSINFO; The SYSINFO structure contains the version of the Power Manager and the version of the Platform Support component as zero-terminated strings ...
Page 19
... The port is off because not con- nected. The port is off because there is not enough STATUS_PORT_DENIED power remaining to grant the power request. STATUS_PORT_BLOCKED The port is off because of a port overload. The user forced the port on. The user forced the port off Rev. 0.1 Si3482 Description 19 ...
Page 20
... Si3482 Table 11 lists Detection values. Detection Unknown Short Low Good High Open Table 12 lists Classification values. Classification Unknown Class 1 Class 2 Class 3 Class 4 Fingers Not Equal Class 0 Overload 4.3.4. GetPortPriorityStatus Get the priority status of a port. Prototype: INT8 GetPortPriorityStatus ( UINT8 Port ) Parameters: The port number (1– ...
Page 21
... If a port has a power limit, then the power limit is returned port does not have a power limit and the port can supply high power, then maximum power ( returned; otherwise, low power (15 returned. Table 13. Port Priority Status Values Value Rev. 0.1 Si3482 Symbol PRIORITY_LOW PRIORITY_HIGH PRIORITY_FORCED PRIORITY_CRITICAL 21 ...
Page 22
... Si3482 4.4. System Control The System Control routines allow a User Interface component to Reset the System Restore Factory Defaults 4.4.1. ResetSystem Reset the system. Prototype: INT8 ResetSystem ( void ) Parameters: None Return Value: Zero (for success error code. 4.4.2. RestoreFactoryDefaults Restore the configuration to factory default values. ...
Page 23
... Get the percentage of power that is reserved from granting. Prototype: INT8 GetReservedPower ( void ) Parameters: None Return Value: Reserved power as a percentage of the total power provided or an error code. The power supply number (1–3) Power provided by the power supply in milliwatts. The power supply number (1–3) Rev. 0.1 Si3482 23 ...
Page 24
... Si3482 4.6.5. SetOverloadLimit Set the maximum system overload that the power supplies can tolerate. Prototype: INT8 SetOverloadLimit ( INT8 Limit ) Parameters: Overload limit as a percentage of the total power provided. Limit Return Value: Zero (for success error code. The overload limit is the maximum system overload that the power supplies can tolerate expressed as a percentage of the total power provided ...
Page 25
... The Power Manager assumes that an endpoint device uses the Alternative A pinout and that a midspan device uses the Alternative B pinout. When to retry after a port overload. Table 16. Retry Policy Values Value 0 RETRY_IMMEDIATELY 1 RETRY_AFTER_RECONNECT 2 RETRY_AFTER_REENABLE Table 17. Power Location Values Value 0 LOCATION_ENDPOINT 1 LOCATION_MIDSPAN Rev. 0.1 Si3482 Symbol Symbol 25 ...
Page 26
... Si3482 4.6.12. GetPowerLocation Get the location of the power source. Prototype: INT8 GetPowerLocation ( void ) Parameters: None Return Value: The location value. 4.7. Port Configuration The Port Configuration routines allow a User Interface component to set and get: Port Enable Port Capability ...
Page 27
... Manager grants the power requested without restriction port's power limit is greater than zero, the Power Manager grants the lesser of the power limit or the power requested power request is greater than the power limit, the Power Manager grants less power than requested. Table 19. Port Priority Values Value 0 PRIORITY_LOW 1 PRIORITY_HIGH 3 PRIORITY_CRITICAL Rev. 0.1 Si3482 Symbol 27 ...
Page 28
... In platforms that do not have signals to indicate the presence of power supplies, this routine allows a User Interface component to simulate the insertion and removal of power supplies. However, the Si3482 does have power supply signals (PS1, PS2, and PS3 User Interface component calls this routine, the Power Manager does nothing and returns SUCCESS ...
Page 29
... Host MCU User Interface EventHan dler() Serial Packet Event Client Task Si3482 Serial Packet GetEvents () Server Event Queue EventH an dler() Power Manager Figure 13. Events Architecture Rev. 0.1 Si3482 29 ...
Page 30
... Si3482 4.10. Return Codes The routines of the Power Manager API return codes to indicate the success or failure of an operation. These codes are also used in Parm1 of error events and information events. 4.10.1. Success Code A zero code indicates success. Success Success 4.10.2. Error Codes A negative code indicates an error ...
Page 31
... BAUD1 Input Top View (Pads on Bottom of Package Table 24. Si3482 Pin Descriptions SPI output. SPI clock. Ground. VDD. Reset (a low will reset the Si3480). Reserved—tie low. Do not connect. Do not connect. Do not connect. Logic high indicates the power supply is available. Logic high indicates the power supply is available. ...
Page 32
... Si3482 Table 24. Si3482 Pin Descriptions (Continued) Pin # Name Type 16 BAUD0 Input 17 SCL Open Collector Connect to Si3452 SCL and pull up resistor. 18 SDA Open Collector Connect to Si3452 SDA and pull up resistor. 19 INT Input 20 RSVD Reserved 21 RX Input 22 TX Output 23 NSS Input 24 MOSI Input ...
Page 33
... Package Outline: 24-Pin QFN The Si3482 is packaged in an industry-standard, RoHS-compliant Figure 14. 24-Pin QFN Mechanical Diagram Table 6.1. QFN-24 Package Dimensions Bottom View Side View e MM Min Typ Max A 0.70 0.75 0.80 A1 0.00 0.02 0.05 A2 — 0.50 — A3 — 0.25 — b 0.18 ...
Page 34
... Si3482 7. PCB Land Pattern Pin #1 Optional GND Connection 0.20 mm 0.30 mm 0.35 mm 0.75 mm 0.10 mm Figure 15. Typical QFN-24 PCB Land Pattern 34 Top View E2 0. Rev. 0.1 ...
Page 35
... Solder/Paste Recommendation Pin #1 0.20 mm 0.30 mm 0.35 mm 0.45 mm 0.75 mm 0.10 mm Figure 16. QFN-24 Solder Paste Recommendation Top View 0.60 mm 0.45 mm 0.30 mm 0.80 mm 0.20 mm 0. Rev. 0.1 Si3482 35 ...
Page 36
... Si3482 9. Top Marking Diagram Line 1 Marking: Line 2 Marking: Line 3 Marking: TTTTT = Trace Code YYWW+ = Date Code Line 4 Marking: Lead Free Designator 36 3482A 01 TTTTT YYWW+ Figure 17. Top Marking Diagram Table 25. Top Marking Explanation Pin 1 Identifier Product ID Firmware revision Manufacturing code characters from the ...
Page 37
... Si3500 for generating the 3.3 V Notes: 1. Add “R” to the part number to denote tape and reel option (Si3482-A01-GMR). 2. The ordering part number is not the same as the device mark. See "6. Package Outline: 24-Pin QFN" on page 33 for device marking information Table 26 ...
Page 38
... Si3482 C I ONTACT NFORMATION Silicon Laboratories Inc. 400 West Cesar Chavez Austin, TX 78701 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Please visit the Silicon Labs Technical Support web page: https://www.silabs.com/support/pages/contacttechnicalsupport.aspx and register to submit a technical support request. The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. ...