參數(shù)資料
型號： HCPL-7721
英文描述： 40 ns Propagation Delay CMOS Optocoupler
中文描述： 40納秒的傳播延遲的CMOS光電耦合器
文件頁數(shù)： 15/18頁
文件大?。?/td> 437K
代理商： HCPL-7721
15
Figure 20. Isolated node providing power to the network.
Isolated Node Providing Power to
the Network
Figure 20 shows a node providing
power to the network. The AC line
powers a regulator which
provides five (5) volts locally. The
AC line also powers a 24 volt
isolated supply, which powers the
network, and another five-volt
regulator, which, in turn, powers
the transceiver and isolated
(network) side of the two
optocouplers. This method is
recommended when there are a
limited number of devices on the
network that don’t require much
power, thus eliminating the need
for separate power supplies.
More importantly, the unique
“dual-inverting” design of the
HCPL-772X/072X ensure the
network will not “l(fā)ock-up” if
either AC line power to the node
is lost or the node powered-off.
Specifically, when input power
(V
DD1
) to the HCPL-772X/072X
located in the transmit path is
eliminated, a RECESSIVE bus
state is ensured as the
HCPL-772X/072X output voltage
(V
O
) go HIGH.
NODE/APP SPECIFIC
uP/CAN
HCPL
772x/072x
HCPL
772x/072x
TRANSCEIVER
5 V REG.
V+ (SIGNAL)
V
–
(SIGNAL)
V+ (POWER)
V
–
(POWER)
GALVANIC
ISOLATION
BOUNDARY
AC LINE
DRAIN/SHIELD
SIGNAL
POWER
ISOLATED
SWITCHING
POWER
SUPPLY
5 V REG.
DEVICENET NODE
Figure 19. Isolated node with transceiver powered by the network.
NODE/APP SPECIFIC
uP/CAN
HCPL
772x/072x
HCPL
772x/072x
TRANSCEIVER
NON ISO
5 V
REG.
NETWORK
POWER
SUPPLY
V+ (SIGNAL)
V
–
(SIGNAL)
V+ (POWER)
V
–
(POWER)
GALVANIC
ISOLATION
BOUNDARY
AC LINE
DRAIN/SHIELD
SIGNAL
POWER
*HCPL
772x/072x
* OPTIONAL FOR BUS V + SENSE
node with an un-powered isolated
Physical Layer will accumulate
errors and become bus-off if it
attempts to transmit. The Bus V+
sense signal would be used to
change the BOI attribute of the
DeviceNet Object to the “auto-
reset” (01) value. Refer to Volume
1, Section 5.5.3. This would cause
the node to continually reset until
bus power was detected. Once
power was detected, the BOI
attribute would be returned to the
“hold in bus-off” (00) value. The
BOI attribute should not be left in
the “auto-reset” (01) value since
this defeats the jabber protection
capability of the CAN error
confinement. Any inexpensive
low frequency optical isolator can
be used to implement this feature.
相關(guān)PDF資料
PDF描述
HCPL-7840 Isolation Amplifier(隔離放大器)
HCPL-7850 Hermetically Sealed Analog Isolation Amplifier(密封模擬隔離放大器)
HCPL-7851 Hermetically Sealed Analog Isolation Amplifier(密封模擬隔離放大器)
HCPL-7870 Isolated 15-bit A/D Converter(隔離15位A/D轉(zhuǎn)換器)
HCPL-788J Isolation Amplifier with Short Circuit and Overload Detection(具有短路和過載保護(hù)功能的隔離放大器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HCPL-7721#060 功能描述:高速光耦合器 1Ch 10mA 600mW RoHS:否 制造商:Avago Technologies 電流傳遞比: 最大波特率: 最大正向二極管電壓:1.75 V 最大反向二極管電壓:5 V 最大功率耗散:40 mW 最大工作溫度:+125 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-5 封裝:Tube
HCPL-7721#300 功能描述:高速光耦合器 1Ch 10mA 600mW RoHS:否 制造商:Avago Technologies 電流傳遞比: 最大波特率: 最大正向二極管電壓:1.75 V 最大反向二極管電壓:5 V 最大功率耗散:40 mW 最大工作溫度:+125 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-5 封裝:Tube
HCPL-7721#360 功能描述:高速光耦合器 1Ch 10mA 600mW RoHS:否 制造商:Avago Technologies 電流傳遞比: 最大波特率: 最大正向二極管電壓:1.75 V 最大反向二極管電壓:5 V 最大功率耗散:40 mW 最大工作溫度:+125 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-5 封裝:Tube
HCPL-7721#500 功能描述:高速光耦合器 1Ch 10mA 600mW RoHS:否 制造商:Avago Technologies 電流傳遞比: 最大波特率: 最大正向二極管電壓:1.75 V 最大反向二極管電壓:5 V 最大功率耗散:40 mW 最大工作溫度:+125 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-5 封裝:Tube
HCPL-7721#560 功能描述:高速光耦合器 1Ch 10mA 600mW RoHS:否 制造商:Avago Technologies 電流傳遞比: 最大波特率: 最大正向二極管電壓:1.75 V 最大反向二極管電壓:5 V 最大功率耗散:40 mW 最大工作溫度:+125 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-5 封裝:Tube
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