 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
PM8803TR датащи(PDF) 19 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
PM8803TR датащи(HTML) 19 Page - STMicroelectronics |
|
|
19 / 34 page  PM8803 PD interface Doc ID 018559 Rev 2 19/34 Figure 6. PM8803: reference schematic of the PoE classification logic The classification resistor can be disconnected for the following reasons: – the classification has been successfully completed – an auxiliary power source has been connected – the device is in thermal protection Designers can set the current by changing the value of the external resistor according to the following table. 4.3 Indication of successful 2-event classification The PM8803 is capable of recognizing whether it is connected to a PSE performing 1-event or 2-event physical layer classification by asserting the T2P signal. T2P is an open-drain, active-low signal which is asserted in case a successful 2-event classification event is completed. T2P will be asserted as soon as the high-voltage startup regulator output is stable. ( see Figure 7 and Figure 8 for timing sequences). If the PM8803 sees a 1-event classification or no classification, T2P is pulled up and the main circuit in the PD can try to establish an LLDP connection to negotiate the power. No LLDP response from the PSE means that the PD is connected to a Type1 PSE, and only 13 W input power will be available. Table 7. Value of the external classification resistor for the different PD classes of power Class PD max average power (W) RCLS (Ω) 013 2k 13.84 150 26.49 80.6 313 51.1 425.5 35.6 VDD VSS + - 1.4V RCLASS CLS EN Thermal_alarm Class_enable Aux_enabled PM8803 AM045096v1 |
|
ссылки URL |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | Ссылка на техническое описание | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
