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參數資料
| 型號： | LTC4274CUHF#PBF |
| 廠商： | Linear Technology |
| 文件頁數： | 13/28頁 |
| 文件大小： | 702K |
| 描述： | IC CONTROLLER POE 38-QFN |
| 標準包裝： | 52 |
| 類型： | 以太網供電 PSE 控制器（PoE） |
| 應用： | 供電設備（PSE） |
| 內部開關： | 無 |
| 電流限制： | 可調 |
| 電源電壓： | 3 V ~ 4.3 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 38-QFN |
| 供應商設備封裝： | 38-QFN（5x7）裸露焊盤 |
| 包裝： | 管件 |
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LTC4274
13
4274fd
PIN FUNCTIONS
the power dissipation in the external MOSFET by reduc-
ing the current limit threshold when the drain-to-source
voltage exceeds 10V. The Power Good bit is set when the
voltage from OUT to V
EE
drops below 2.4V (typ). A 500k
resistor is connected internally from OUT to AGND when
the port is idle.
V
EE
: Main Supply Input. Connect to a 45V to 57V
supply, relative to AGND.
AUTO: AUTO Pin Mode Input. AUTO pin mode allows the
LTC4274 to detect and power up a PD even if there is no
host controller present on the I
2
C bus. The voltage of the
AUTO pin determines the state of the internal registers
when the LTC4274 is reset or comes out of V
DD
UVLO
(see the LTC4274 Software Programming documenta-
tion). The states of these register bits can subsequently
be changed via the I
2
C interface. The real-time state of the
AUTO pin is read at bit 0 in the Pin Status register (11h).
Internally pulled down to DGND. Must be tied locally to
either V
DD
or DGND.
MSD: Maskable Shutdown Input. Active low. When pulled
low, all ports that have their corresponding mask bit set
in the Misc Config register (17h) will be reset, equivalent
to pulling the SHDN pin low. Internal filtering of the MSD
pin prevents glitches less than 1約 wide from resetting
ports. Internally pulled up to V
DD
.
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相關代理商/技術參數 |
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| LTC4274IUHF#PBF | 制造商:Linear Technology 功能描述:POE Controller 25.5W 38-Pin QFN EP 制造商:Linear Technology 功能描述:Bulk 制造商:Linear Technology 功能描述:IC POE IEEE 802.3AT 38-QFN 制造商:Linear Technology 功能描述:IC POE CNTRL 38QFN 制造商:Linear Technology 功能描述:IC, POE, CNTRL, 38QFN 制造商:Linear Technology 功能描述:IC, POE CONTROLLER, 3.6V, QFN-38; Input Voltage:3.6V; Supply Current:1.1mA; Digital IC Case Style:QFN; No. of Pins:38; Frequency:1MHz; Operating Temperature Min:-40C; Operating Temperature Max:85C; MSL:MSL 1 - Unlimited ;RoHS Compliant: Yes |
| LTC4274IUHF#PBF | 制造商:Linear Technology 功能描述:IC POE CONTROLLER 3.6V QFN-38 |
| LTC4274IUHF#TRPBF | 制造商:Linear Technology 功能描述:POE Controller 25.5W 38-Pin QFN EP |
| LTC42766C | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Quad PoE/PoE/LTPoE PSE Controller |
| LTC4278 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support |
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