Selection of Isolation Transformer(1) One simple 1:1 iso" />
參數(shù)資料
型號(hào): KSZ8995XA-EVAL
廠商: Micrel Inc
文件頁(yè)數(shù): 46/51頁(yè)
文件大?。?/td> 0K
描述: BOARD EVALUATION FOR KSZ8995XA
標(biāo)準(zhǔn)包裝: 1
主要目的: 接口,以太網(wǎng)控制器(PHY 和 MAC)
嵌入式:
已用 IC / 零件: KSZ8995XA
主要屬性: 5 個(gè)端口,100BASE-TX/100BASE-FX/10BASE-T
次要屬性: 2xMII,SNI
已供物品: 板,CD,文檔,電源
產(chǎn)品目錄頁(yè)面: 1114 (CN2011-ZH PDF)
相關(guān)產(chǎn)品: KSZ8995XAB3-ND - IC SWITCH 5-PORT 10/100 128PQFP
KSZ8995XA4-ND - IC SWITCH 5-PORT 10/100 128PQFP
576-1042-ND - IC SWITCH 10/100 5PORT 128PQFP
576-1041-ND - IC SWITCH 10/100 5PORT 128PQFP
其它名稱: 576-1642
KS8995XA
Micrel, Inc.
M9999-051305
50
May 2005
Selection of Isolation Transformer(1)
One simple 1:1 isolation transformer is needed at the line interface. An isolation transformer with integrated common-mode
choke is recommended for exceeding FCC requirements. The following table gives recommended transformer characteristics.
Characteristics Name
Value
Test Condition
Turns Ratio
1 CT : 1 CT
Open-Circuit Inductance (min.)
350H
100mV, 100kHz, 8mA
Leakage Inductance (max.)
0.4H
1MHz (min.)
Inter-Winding Capacitance (max.)
12pF
D.C. Resistance (max.)
0.9
Insertion Loss (max.)
1.0dB
0MHz to 65MHz
HIPOT (min.)
1500Vrms
Note:
1. The IEEE 802.3u standard for 100BASE-TX assumes a transformer loss of 0.5dB. For the transmit line transformer, insertion loss of up to 1.3dB can
be compensated by increasing the line drive current by means of reducing the ISET resistor value.
The following transformer vendors provide compatible magnetic parts for Micrel’s device:
4-Port Integrated
Auto
Number
Single-Port
Auto
Number
Vendor
Part
MDIX
of Ports
Vendor
Part
MDIX
of Ports
Pulse
H1164
Yes
4
Pulse
H1102
Yes
1
Bel Fuse
558-5999-Q9
Yes
4
Bel Fuse
S558-5999-U7
Yes
1
YCL
PH406466
Yes
4
YCL
PT163020
Yes
1
Transpower
HB826-2
Yes
4
Transpower
HB726
Yes
1
Delta
LF8731
Yes
4
Delta
LF8505
Yes
1
LanKom
SQ-H48W
Yes
4
LanKom
LF-H41S
Yes
1
Table 12. Qualified Magnetics Lists
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