SI3460-EVB Silicon Laboratories Inc, SI3460-EVB Datasheet - Page 9

• Manufacturer Part Number: SI3460-EVB
• Description: BOARD EVAL POE FOR SI3460
• Manufacturer: Silicon Laboratories Inc
• Type: DC/DC Switching Converters, Regulators & Controllersr

Specifications of SI3460-EVB

• Main Purpose: Special Purpose DC/DC, Power Over Ethernet
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: -48V
• Board Type: Fully Populated
• Utilized Ic / Part: Si3460
• Input Voltage: 12 V, 15 V
• Output Voltage: - 48 V
• Interface Type: Ethernet
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Product: Power Management Modules
• For Use With/related Products: Si3460
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Input: -
• Power - Output: -
• Frequency - Switching: -
• Regulator Topology: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1842

3.1. PSE Timing Characteristics
When implemented in accordance with the recommended external components and layout guidelines, the Si3460
controller enables the following typical performance characteristics in single-port PSE applications. Refer to the
Si3460-EVB applications note, schematics, and user's guide for more details.
Table 6. PSE Timing*
3.1.1. PSE Timing Diagrams
The basic sequence of applying power is shown in Figure 2. Following is the description of the function that must
be performed in each phase.
Description
Endpoint detection delay
cycle
Detection time
Classification delay cycle
Classification time
Power-up turn-on delay
Midspan detect backoff time
Current limit time
Disconnect delay
*Note: These typical specifications are based on an ambient operating temperature of 25 ºC and V
Figure 2. Detection, Classification, Powerup, and Disconnect Sequence
20.5 V
15.5 V
2.8 V
57 V
10 V
44 V
t
CLASS_CYCLE
t
DET_CYCLE
Symbol
t
t
t
t
DETECT
t
PWRUP
DC_DIS
DET_CYCLE
CLASS
t
t
BOM
LIM
Time from when a valid detection is
Time from PD connection to port to
Time from successful detect mode
completion of detection process.
completed until V
Time required to measure PD
t
CLASS_CYCLE
to classification complete.
Rev. 1.1
signature resistance.
Test Conditions
t
PWRUP
applied
OUT
power is
Min
70
10
10
—
—
—
—
2
IN
(msec)
Typ
350
= +12 V.
Time
70
30
60
—
—
—
—
Si3460
Max
400
50
50
—
—
—
—
—
Unit
ms
ms
ms
ms
ms
ms
ms
s
9