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LTC4259A Datasheet(PDF) 32 Page - Linear Technology

Part # LTC4259A
Description  Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect
PDF  32 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4259A Datasheet(HTML) 32 Page - Linear Technology

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LTC4259A
32
4259Af
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 q FAX: (408) 434-0507 q www.linear.com
©LINEAR TECHNOLOGY CORPORATION 2003
LT/TP 0204 1K • PRINTED IN USA
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1619
Low Voltage Current Mode PWM Controller
–48V to 3.3V at 300mA, MSOP Package
LTC1694
SMBus/I2C Accelerator
Improved I2C Rise Time, Ensures Data Integrity
LTC4255
Quad Network Power Controller
Non-IEEE 802.3af Compliant Current Levels
LTC4257
IEEE 802.3af PD Interface Controller
100V 400mA Internal Switch, Programmable Classification
LTC4257-1
IEEE 802.3af PD Interface Controller
100V 400mA Dual Current Limit
LTC4258
Quad IEEE 802.3af Power Over Ethernet Controller
DC Disconnect Only
4258 F20A
1
2
3
4
5
6
7
8
2k
2k
0.1
µF
0.1
µF
0.1
µF
200
Ω
200
Ω
200
Ω
200
Ω
U2
U3
U1
HCPL-063L
HCPL-063L
VDD CPU
SCL
SDA
SMBALERT
GND CPU
DAC: DIODES INC OR FAIRCHILD S1B
DDET: CENTRAL SEMI CMPD3003
DTSS: DIODES INC SMAJ58A
CDET: TDK C3225X7R2A474K
L1: PULSE ENG PO473
Q1: FAIRCHILD IRFM120A
RS: VISHAY WSL2010 0.5Ω 0.5%
T1: PULSE ENG H2009
U1: FAIRCHILD NC7WZ17
U2, U3: AGILENT HCPL-063L
PHY
(NETWORK
PHYSICAL
LAYER
CHIP)
DTSS
58V
SMAJ58A
0.1
µF
100V
X7R
1
µF
1k
VEE
SENSE GATE OUT
VDD
SCL
SDAIN
SDAOUT
INT
DDET
CMPD3003
10k
DAC
S1B
RDET
1k
0.1
µF
L1
CDET
0.47
µF
100V
X7R
RS
0.5
Ω
Q1
IRFM120A
1/4
LTC4259A
DGND
OSCIN
AGND
DETECT
BYP
–48V
ISOLATED
ISOLATED
3.3V
ISOLATED
GND
2VP-P, 100Hz
1.2V OFFSET
OSCILLATOR
0.01
µF
200V
0.01
µF
200V
0.01
µF
200V
0.01
µF
200V
75
Ω
75
Ω
75
Ω
75
Ω
RJ45
CONNECTOR
1/2 PULSE
H2009
T1
1:1
T1
1:1
1000pF
2000V
Figure 20. One Complete Isolated Powered Ethernet Port
TYPICAL APPLICATIO



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