ltc4259a Linear Technology Corporation, ltc4259a Datasheet - Page 32

• Manufacturer Part Number: ltc4259a
• Description: Quad Ieee 802.3af Power Over Ethernet Controller With Ac Disconnect
• Manufacturer: Linear Technology Corporation

TYPICAL APPLICATIO
LTC4259A
32
RELATED PARTS
PART NUMBER
LT1619
LTC1694
LTC4255
LTC4257
LTC4257-1
LTC4258
LTC4267
SMBALERT
GND CPU
SDA
V
SCL
DD
D
D
D
C
L1: PULSE ENG PO473
Q1: FAIRCHILD IRFM120A
R
T1: PULSE ENG H2009
U1: FAIRCHILD NC7WZ17
U2, U3: AGILENT HCPL-063L
DET
AC
DET
TSS
S
: VISHAY WSL2010 0.5Ω 0.5%
CPU
: DIODES INC OR FAIRCHILD S1B
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
: TDK C3225X7R2A474K
: 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
IEEE802.3af PD Interface with
Integrated Switching Regulator
U1
●
0.1µF
FAX: [phone]
2
200Ω
200Ω
C Accelerator
HCPL-063L
HCPL-063L
U
Figure 22. One Complete Isolated Powered Ethernet Port
●
www.linear.com
U3
U2
200Ω
200Ω
2k
2k
0.1µF
ISOLATED
3.3V
0.1µF
ISOLATED
COMMENTS
Improved I
Non-IEEE 802.3af Compliant Current Levels
100V, 400mA Internal Switch, Programmable Class
–48V
(NETWORK
–48V to 3.3V at 300mA, MSOP Package
100V, 400mA Internal Switch, Dual Current Limit, Programmable Class
DC Disconnect Only
100V, 400mA UVLO Switch, Dual Inrush Current, Programmable Class
PHYSICAL
V
SCL
SDAIN
SDAOUT
INT
V
OSCIN
DD
LAYER
CHIP)
EE
PHY
0.5Ω
R
S
SENSE GATE OUT
LTC4259A
DGND
1/4
IRFM120A
2
C Rise Time, Ensures Data Integrity
AGND
Q1
DETECT
1:1
1:1
T1
T1
BYP
10k
1/2 PULSE
H2009
D
S1B
CMPD3003
AC
0.1µF
100V
X7R
D
DET
© LINEAR TECHNOLOGY CORPORATION 2004
ISOLATED
R
1k
0.1µF
100V
DET
GND
C
0.47µF
100V
X7R
X7R
DET
0.01µF
0.01µF
200V
200V
LT 1205 REV B • PRINTED IN USA
75Ω
75Ω
1µF
1k
D
58V
SMAJ58A
TSS
75Ω
75Ω
1000pF
2000V
2V
1.2V OFFSET
OSCILLATOR
P-P
0.01µF
0.01µF
200V
200V
, 100Hz
CONNECTOR
L1
4258 F22A
RJ45
4259afb
1
2
3
4
5
6
7
8