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參數資料
| 型號： | LTC4269IDKD-2#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDSO32 |
| 封裝： | 7 X 4 MM, PLASTIC, M0-229, DFN-32 |
| 文件頁數： | 1/34頁 |
| 文件大小： | 383K |
| 代理商： | LTC4269IDKD-2#TR |
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LTC4269-2
42692fb
Typical applicaTion
FeaTures
applicaTions
DescripTion
IEEE 802.3at High Power PD
and Synchronous Forward
Controller with AUX Support
The LTC4269-2 is an integrated Powered Device (PD)
interface and power supply controller featuring 2-event
classification signaling, flexible auxiliary power op-
tions, and a power supply controller suitable for syn-
chronously rectified forward supplies. These features
make the LTC4269-2 ideally suited for an IEEE802.3at
PD application.
The PD controller features a 100V MOSFET that isolates
the power supply during detection and classification, and
provides 100mA inrush current limit. Also included are
power good outputs, an undervoltage/overvoltage lock-
out and thermal protection. The current mode forward
controller allows for synchronous rectification, resulting
in an extremely high efficiency, green product. Soft-start
for controlled output voltage start-up and fault recovery is
included.Programmablefrequencyover100kHzto500kHz
allows flexibility in efficiency vs size and low EMI.
n
25.5W IEEE 802.3at Compliant (Type-2) PD
n
PoE+ 2-Event Classification
n
IEEE 802.3at High Power Available Indicator
n
Integrated State-of-the-Art Synchronous Forward
Controller
– Isolated Power Supply Efficiency >94%
n
Flexible Auxiliary Power Interface
n
Superior EMI Performance
n
Robust 100V 0.7Ω (Typ) Integrated Hot Swap
MOSFET
n
Integrated Signature Resistor, Programmable Class
Current, UVLO, OVLO and Thermal Protection
n
Short-Circuit Protection with Auto-Restart
n
Programmable Switching Frequency from
100kHz to 500kHz
n
Thermally Enhanced 7mm
× 4mm DFN Package
n
IP Phones with Large Color Screens
n
Dual Radio 802.11n Access Points
n
PTZ Security Cameras
+
T2P VNEG
VPORTN
SHDN
RCLASS
VPORTP
PGND
TO
MICRO-
CONTROLLER
GND BLANK DELAY
82k
30.9
332k 158k
133
10k
5.1
158k
22.1k
33k
1.5k
50m
2k
1.2k
TLV431
VCC
11.3k
3.65k
42692 TA01
22k
0.22F
0.1F
ROSC
VREF
FB
COMP
ISENSE
OC
SS_MAXDC
SD_VSEC
VIN
PWRGD
SOUT
LTC4269-2
0.1F
10F
VCC
33k
237k
2.2F
+
10F
10H
1mH
6.8H
10.0k
OUT
4.7nF
0.1F
54V FROM
DATA PAIR
54V FROM
SPARE PAIR
+
–
~
+
–
~
4.7nF
10nF
+
220F
5V
5A
PoE-Based Self-Driven Synchronous Forward Power Supply
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Hot Swap, ThinSOT are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC4269IDKD-2-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support |
| LTC4270 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:12-Port PoE/PoE+/LTPoE++ PSE Controller |
| LTC4270/ | 制造商:LINER 制造商全稱:Linear Technology 功能描述:8-Port PoE/PoE PSE Controller |
| LTC4270_12 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:12-Port PoE/PoE+/LTPoE++ PSE Controller |
| LTC4270AIUKG#PBF | 制造商:Linear Technology 功能描述:POE Controller 90W 52-Pin QFN EP 制造商:Linear Technology 功能描述:Bulk 制造商:Linear Technology 功能描述:IC POE LTPOE 12-PORT PSE 52-QFN 制造商:Linear Technology 功能描述:PSE CNTRL 12 PORT 90W 1MHZ 制造商:Linear Technology 功能描述:IC PSE CONTROLLER 3.3V QFN-52 制造商:Linear Technology 功能描述:IC, PSE CONTROLLER, 3.3V, QFN-52; Input Voltage:3.3V; Supply Current:10mA; UVLO:25V; Digital IC Case Style:QFN; No. of Pins:52; Frequency:1MHz; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:52-QFN ;RoHS Compliant: Yes |
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