LTC4258 LINER [Linear Technology], LTC4258 Datasheet - Page 28

• Manufacturer Part Number: LTC4258
• Description: Quad IEEE 802.3af Power over Ethernet Controller with Integrated Detection
• Manufacturer: LINER [Linear Technology]

TYPICAL APPLICATIO
LTC4258
28
RELATED PARTS
PART NUMBER
LT1619
LTC1694
LTC4255
LTC4257
LTC4257-1
LTC4259A
GND CPU
SDA
SMBALERT
V
SCL
DD
D
D
L1: PULSE ENG PO473
Q1: FAIRCHILD IRFM120A
R
T1: PULSE ENG H2009
U1: FAIRCHILD NC7WZ17
U2, U3: AGILENT HCPL-063L
DET
TSS
S
CPU
: VISHAY WSL2010 0.5 0.5%
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone]
: CENTRAL SEMI CMPD3003
: DIODES INC SMAJ58A
DESCRIPTION
Low Voltage Current Mode PWM Controller
SMBus/I
Quad Network Power Controller
IEEE 802.3af PD Interface Controller
IEEE 802.3af PD Interface Controller
Quad IEEE 802.3af Power Over Ethernet Controller
U1
0.1 F
2
200
200
C Accelerator
HCPL-063L
HCPL-063L
U
Figure 17. One Complete Isolated Powered Ethernet Port
www.linear.com
U3
U2
200
200
2k
2k
0.1 F
ISOLATED
3.3V
0.1 F
ISOLATED
COMMENTS
Improved I
Non-IEEE 802.3af Compliant Current Levels
100V 400mA Internal Switch, Programmable Classification
With AC Disconnect
–48V to 3.3V at 300mA, MSOP Package
100V 400mA Dual Current Limit
–48V
(NETWORK
V
SCL
SDAIN
SDAOUT
INT
PHYSICAL
V
DD
LAYER
CHIP)
EE
PHY
0.5
R
DGND AGND
S
SENSE GATE OUT
LTC4258
1/4
2
IRFM120A
C Rise Time, Ensures Data Integrity
Q1
DETECT
1:1
1:1
T1
T1
BYP
10k
1/2 PULSE
H2009
CMPD3003
0.1 F
D
DET
ISOLATED
LINEAR TECHNOLOGY CORPORATION 2004
0.1 F
100V
GND
X7R
0.01 F
0.01 F
200V
200V
LT/TP 0104 1K • PRINTED IN USA
75
75
D
58V
SMAJ58A
TSS
75
75
1000pF
2000V
0.01 F
0.01 F
200V
200V
CONNECTOR
L1
4258 F17
RJ45
4258p
1
2
3
4
5
6
7
8