参数资料
型号: SI3402-A-GMR
厂商: Silicon Laboratories Inc
文件页数: 6/22页
文件大小: 0K
描述: IC POE PD LOW EMI SW REG 20VQFN
标准包装: 2,500
类型: 以太网供电开关(PoE)
应用: IP 电话,LAN 网络供电,网络路由器和交换机
内部开关:
电流限制: 470mA
电源电压: 2.8 V ~ 57 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-VQFN 裸露焊盘
供应商设备封装: 20-QFN(5x5)
包装: 带卷 (TR)
Si3402
Table 4. Electrical Characteristics
Parameter
Description
Detection
Classification
UVLO Disabled
Min
2.7
14
Typ
Max
11
22
42
Unit
VPORT
(Supply turns ON)
V
UVLO Enabled
30
36
(Supply turns OFF)
Transient Surge 1
62
79
Input Offset Current
Diode Bridge Leakage
VPORT < 10 V
VPORT = 57 V
Class 0
Class 1
0
9
10
25
4
12
μA
μA
IPORT
Classification 2
Class 2
17
20
mA
Class 3
Class 4
26
36
30
44
IPORT Operating
Current 3
36 V < VPORT < 57 V
2
3.1
mA
Current Limit 4
Hotswap FET On-Resistance +
R SENSE
Power Loss VPORT Threshold
Switcher Frequency
Inrush
Operating
36 V < VPORT < 57 V
470
0.5
27
140
30
350
680
1.5
33
mA
mA
?
V
kHz
Maximum Switcher Duty
Cycle 5
ISOSSFT Connected to
VDD
50
%
Regulated Feedback @ Pin FB
Switcher Output Transient Voltage
Switching FET On-Resistance
6
SWO Voltage
with Static Load
SWO Voltage
with Switched Load
DC Avg.
0.3
1.23
80
86
0.86
V
V
?
V
Notes:
1. Transient surge defined in IEC60060 as a 1000 V impulse of either polarity applied to CT1–CT2 or SP1–SP2. The
shape of the impulse shall have a 300 ns full rise time and a 50 μs half fall time with 201 ? source impedance.
2. The classification currents are guaranteed only when recommended RCLASS resistors are used, as specified in
Table 10.
3. IPORT includes full operating current of switching regulator controller.
4. The PD interface includes dual-level input current limit. At turn-on, before the HSO load capacitor is charged, the
current limit is set at the inrush level. After the capacitor has been charged within ~1.25 V of VNEG, the operating
current limit is engaged. This higher current limit remains active until the UVLO lower limit has been tripped or until the
hotswap switch is sufficiently current-limited to cause a foldback of the HSO voltage.
5. See “AN296: Using the Si3400/1/2 PoE PD Controller in Isolated and Non-Isolated Designs” for more information.
6. Applies to non-isolated applications only (VOUT on schematic in Figure 1).
6
Rev. 1.31
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