LTC4263 데이터 시트보기 (PDF) - Linear Technology

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LTC4263

Quad IEEE 802.3at Power over Ethernet Controller

Linear Technology 

LTC4266

TEST TIMING DIAGRAMS

VPORTn

tDET

FORCED-CURRENT

0V

VOC

PD

CONNECTED

CLASSIFICATION

FORCED-

VOLTAGE

VMARK

VCLASS

tCLE1

tME1

tME2

tCLE2

tCLE3

15.5V

20.5V

tDETDLY

INT

tPON

VEE

4266 F01

Figure 1. Detect, Class and Turn-On Timing in AUTO Pin or Semi-Auto Modes

VSENSEn TO VEE

VLIM

0V

INT

VCUT

tSTART, tICUT

4266 F02

Figure 2. Current Limit Timing

VSENSEn

TO VEE

VMIN

INT

tMPS

tDIS

4266 F03

Figure 3. DC Disconnect Timing

VGATEn

MSD or

SHDNn

tMSD

tSHDN

VEE

4266 F04

t3

t4

tr

tf

SCL

t2

t5

t6

t7

SDA

t1

t8

4266 F05

Figure 4. Shut Down Delay Timing

Figure 5. I2C Interface Timing

4266fb

10

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