- 您現在的位置：買賣IC網 > PDF目錄373995 > ADM1041ARQ-REEL (ANALOG DEVICES INC) Secondary-Side Controller with Current Share and Housekeeping PDF資料下載
參數資料
| 型號： | ADM1041ARQ-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 通信及網絡 |
| 英文描述： | Secondary-Side Controller with Current Share and Housekeeping |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO24 |
| 封裝： | MO-137AE, QSOP-24 |
| 文件頁數： | 28/64頁 |
| 文件大?。?/td> | 1063K |
| 代理商： | ADM1041ARQ-REEL |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁當前第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁
ADM1041
OrFET GATE DRIVE
When configured, this block provides a signal to turn on/off an
OrFET used in the output of paralleled power supplies. The gate
drive voltage of one of these FETs is typically 6 V to 10 V above
the output voltage. Since the output voltage of the ADM1041 is
limited, an external transistor needs to be used. The block
diagram shows an example of this approach. See Figure 21.
Rev. A | Page 28 of 64
The F
G
output is an open-drain, N-channel MOSFET and is
normally high, which holds the OrFET off. When all the start-
up conditions are correct, Pin 19 is pulled low, which allows the
OrFET to turn on. The logic can also be configured as inverted
if a noninverting drive circuit is used.
A differential amplifier monitors the voltage across the OrFET
and has two major functions. First, during start-up, it allows the
OrFET to turn on with almost 0 V across it to avoid voltage
glitches on the bus. This applies to a hot bus or a cold bus. The
internal threshold can be configured from 20 mV to 50 mV
(negative), which is scaled up by the external voltage dividers.
Second, if a rectifier or filter capacitor fails during steady state
operation, it detects the resulting reverse voltage across the
OrFET’s on-resistance and turns off the OrFET before a voltage
dip appears on the bus. The internal threshold can be configured
from 100 mV to 250 mV (negative), which is also scaled up by
the external voltage dividers. A slightly larger filter capacitor
may be used on the voltage divider at Pin 6 to speed up this
function.
Figure 17 shows the typical response time of the ADM1041 to
such an event. In the plot, V
FD
is ramped down and the response
time of the F
G
pin to a reverse voltage event on the F
D
pin is
seen. This simulates the rectifier or filter capacitor failure
during steady state operation. When the F
D
voltage is below
1.9 V (2 V minus 100 mV threshold), the F
G
pin reacts. As can
be seen, the response time is approx 330 nsecs. This extremely
fast turn-off is vital in an n+1 power supply system configuration.
It ensures that the damaged power supply removes itself from
the system quickly. Figure 18 is the equivalent response time to
turn on the OrFET. As can be seen, there is a delay of approxi-
mately 500 ns before the FG pin ramps down to turn on the
OrFET, and therefore allow the power supply to contribute to the
system. This propagation delay is due mainly to internal amplifier
response limitations. The circuit in Figure 21 is used to generate
these plots. In this case, the resistor to VDD from the FG pin is
2 k.
Figure 19 and Figure 20 show the OrFET turn-off time and
turn-on time when the F
G
pin polarity is inverted. As can be
seen, to turn off the OrFET, the V
FG
pin now transitions from
high to low. Also, its corresponding turn-on event occurs from a
low-to-high transition. The circuit in Figure 21 is used to
generate these plots.
0
64%
T
TOTAL
= 330ns
T
DELAY
= 218ns T = 112ns
Figure 17. OrFET Turn-Off Time (Default Polarity)
T
TOTAL
= 506ns
0
Figure 18. OrFET Turn-On Time (Default Polarity)
相關PDF資料 |
PDF描述 |
|---|---|
| ADM1041ARQ-REEL7 | Secondary-Side Controller with Current Share and Housekeeping |
| ADM1041 | Secondary-Side Controller with Current Share and Housekeeping |
| ADM1041ARQ | Secondary-Side Controller with Current Share and Housekeeping |
| ADM1041A | Secondary-Side Controller with Current Share and Housekeeping |
| ADM1041AARQZ | Secondary-Side Controller with Current Share and Housekeeping |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADM1041ARQ-REEL7 | 功能描述:IC PWR SUP MON/LOAD SHARE 24QSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電源控制器，監視器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| ADM1041ARQZ | 功能描述:IC PWR SUPP MON/LOAD SHAR 24QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監視器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| ADM1041ARQZ-REEL | 功能描述:IC SECONDARY SIDE CTRLR 24QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監視器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| ADM1041ARQZ-REEL7 | 功能描述:IC SECONDARY SIDE CTRLR 24QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監視器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
| ADM1041ARQZ-RL7 | 功能描述:IC SECONDARY SIDE CTRLR 24QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源控制器，監視器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 應用:多相控制器 輸入電壓:- 電源電壓:9 V ~ 14 V 電流 - 電源:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（5x5） 包裝:帶卷 (TR) |
發布緊急采購，3分鐘左右您將得到回復。