전자부품 데이터시트 검색엔진 |
|
ADP1048DC1-EVALZ 데이터시트(PDF) 28 Page - Analog Devices |
|
ADP1048DC1-EVALZ 데이터시트(HTML) 28 Page - Analog Devices |
28 / 84 page ADP1047/ADP1048 Data Sheet Rev. 0 | Page 28 of 84 MANUFACTURER-SPECIFIC FLAG RESPONSE Manufacturer-specific flags follow a different response from the standard PMBus flags because these flags are much faster and, in some cases, operate on a pulse-by-pulse basis. FAST OCP Flag Response (Register 0xFE00) The fast OCP flag responds to an overcurrent condition that occurs on the comparator connected to the ILIM pin. This comparator performs a pulse-by-pulse current limiting func- tion (see the Fast Overcurrent Protection (ILIM Pin) section). Four different actions can be programmed for this flag using Bits[7:6]. Regardless of the programmed flag response, the PWM pulse is always terminated when the threshold programmed for the comparator is crossed. • 00 (ignore, do nothing). No action is taken. The PWM pulses are still terminated as long as the OCP condition persists. • 01 (shut down and soft start). The power supply is shut down, and a soft start sequence is initiated after the delay that is programmed in the IIN_OC_FAULT_RESPONSE register (Register 0x5C, Bits[2:0]). • 10 (shutdown and wait for PSON). After the number of switching cycles programmed in Bits[5:4], the power supply is shut down until the PSON signal is received. • 11 (disable the PWM until the flag is cleared). After the number of switching cycles programmed in Bits[5:4], the PWM is disabled until the flag is cleared; no soft start is initiated. FAST OVP Flag Response (Register 0xFE01) The fast OVP flag responds to an overvoltage condition on the programmable comparator connected to the OVP pin. This comparator constantly monitors the output voltage and its operation (see the Fast Overvoltage Protection (OVP Pin) section). Four different actions can be programmed for this flag. • 00 (ignore, do nothing). No action is taken. • 01 (shut down and soft start). The power supply is shut down, and a soft start sequence is initiated after the delay programmed in the VOUT_OV_FAULT_RESPONSE register (Register 0x41, Bits[2:0]). • 10 (immediate shutdown and wait for PSON). The power supply is shut down until the PSON signal is received. • 11 (disable the PWM until the flag is cleared). The PWM is disabled until the flag is cleared; no soft start is done. OLP Flag Response (Register 0xFE02) The OLP flag responds to differences between the OVP and VFB pins. Open-loop protection detects a difference in voltage in excess of ~100 mV, which equates to approximately 6.6% of the full-scale range (see the Open-Loop Protection section). Four different actions can be programmed for this flag. • 00 (ignore, do nothing). No action is taken. • 01 (shut down and soft start). The power supply is shut down, and a soft start sequence is initiated after the delay programmed in the VOUT_OV_FAULT_RESPONSE register (Register 0x41, Bits[2:0]). • 10 (immediate shutdown and wait for PSON). The power supply is shut down until the PSON signal is received. • 11 (disable the PWM until the flag is cleared). The PWM is disabled until the flag is cleared; no soft start is done. VDD and VCORE OV Flag Response (Register 0xFE03 and Register 0xFE04) These two flags respond to an overvoltage condition on the VDD (3.3 V) and VCORE (2.5 V) rails. These rails must be properly decoupled and filtered to guarantee proper operation of the digital controller. The controller can be programmed to ignore the flags or to shut down and restart. A debounce time of 2.56 μs or 660 μs can be set. The controller can also be instructed to reload the contents of the EEPROM upon restart or to resume operation without reloading the EEPROM contents. Reloading the contents of the EEPROM to RAM prevents device malfunction if the RAM contents have been corrupted during the overvoltage condition. BLANKING AND DEBOUNCE TERMINATE PWM PULSE FAST OCP ILIM FLAG SET, PROGRAMMED ACTIONS TIMEOUT 1 TO 8 TIMES Figure 26. Fast OCP Flag |
유사한 부품 번호 - ADP1048DC1-EVALZ |
|
유사한 설명 - ADP1048DC1-EVALZ |
|
|
링크 URL |
개인정보취급방침 |
ALLDATASHEET.CO.KR |
ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 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 |