LTC4265 LINER [Linear Technology], LTC4265 Datasheet - Page 20

• Manufacturer Part Number: LTC4265
• Description: IEEE 802.3at High Power PD Interface Controller with 2-Event Classifi cation Recognition
• Manufacturer: LINER [Linear Technology]

LTC4265
RELATED PARTS
PART NUMBER
LT1952
LT1952-1
LTC3805
LTC3825
LTC4257-1
LTC4258
LTC4259A-1
LTC4263/LTC4263-1 Single IEEE 802.3af Power over Ethernet Controller
LTC4264
LTC4267
LTC4267-1
LTC4267-3
LTC4268-1
ThinSOT is a trademark of Linear Technology Corporation.
20
TYPICAL APPLICATION
B1100 8 PLCS
SPARE
FROM
FROM
–54V
DATA
–54V
PAIR
PAIR
95
90
85
80
75
70
65
0.5
Effi ciency vs Load Current
1
1.5
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
0.1μF
100V
2
LOAD (A)
2.5
GND
3
DESCRIPTION
Single Switch Synchronous Forward Controller
Adjustable Frequency Current Mode Flyback Controller
Isolate No-Opto Synchronous Flyback Controller with
Wide Input Supply Range
IEEE 802.3af PD Interface Controller
Quad IEEE 802.3af Power over Ethernet Controller
Quad IEEE 802.3af Power over Ethernet PSE Controller
with AC Disconnect
High Power PD Interface Controller with 750mA
Current Limit
IEEE 802.3af PD Interface with Integrated Switching
Regulator
High Power PD with Synchronous No Opto Flyback
Controller
3.5
SMAJ58A
4
+
30.9Ω
●
4265 TA03b
FAX: [phone]
4.5
42V
50V
57V
10μF
100V
10μH
GND
R
SHDN
V
5
CLASS
IN
LTC4265
T2PSE
2.2μF
100V
V
OUT
PoE-Based Self-Driven Synchronous Forward Power Supply
237k
10.0k
●
www.linear.com
SD_VSEC
PGND
10μF
16V
V
CC
GND
V
IN
BAS516
33k
BLANK
82k
S
18V
PDZ18B
OUT
LT1952
DO1608C-105
332k
DELAY
133Ω
0.1μF
1mH
BAS516
100pF
SS_MAXDC
BAS516
ROSC
BAS516
OUT
COMMENTS
Adjustable Switching Frequency, Programmable Undervoltage Lockout,
Optional Burst Mode
Slope Comp Overcurrent Protect, Internal/External Clock
Adjustable Switching Frequency, Programmable Undervoltage Lockout,
Accurate Regulation without Trim, Synchronous for High Effi ciency.
100V 400mA Internal Switch, Programmable Classifi cation Current Limit
DC Disconnect Only, IEEE-Compliant PD Detection and Classifi cation,
Autonomous Operation or I
AC or DC Disconnect IEEE-Compliant PD Detection and Classifi cation,
Autonomous Operation or I
Internal Switch, Autonomous Operation or I
750mA Internal Switch, Programmable Classifi cation Current Limit
with disable, Complementary Power Good
100V 400mA Internal Switch, Programmable Classifi cation, 200KHz
or 300KHz Constant Frequency PWM, Interface and Switcher Optimized
for IEEE-Compliant PD System.
750mA Internal Switch, Programmable Class, Current Limit, Synchronous
Programmable Switching Frequency and UVLO, High Effi ciency
ISENSE
158k
IRF6217
COMP
10k
VREF
OC
FB
158k
4.7nF
250V
1.5k
33k
22.1k
FDS2582
0.22μF
GND
22k
PS22801-1-L
51k
BC857BF
®
50mΩ
0.1μF
PA2431NL
5V
Operation at Light Load
•
•
20k
•
T2P (TO MICROCONTROLLER)
2.2nF
FDS8880
2
2
2kV
C Control
C Control
V
5.1Ω
CC
1.2k
PS2801-1-L
© LINEAR TECHNOLOGY CORPORATION 2008
5.1Ω
1nF
TLV431A
FDS8880
2k
2
C Control. 15.4W or 30W.
PG0702.682
10nF
6.8μH
4.7nF
5.1Ω
LT 1208 • PRINTED IN USA
1nF
4265 TA03a
11.3k
3.65k
+
220μF
6.3V
PSLVOJ227M(12)
5V
5A
4265f