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參數資料
| 型號： | TJA1050 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | CAN High-Speed Transceiver(CAN高速收發(fā)器) |
| 中文描述： | CAN高速收發(fā)器（的CAN高速收發(fā)器） |
| 文件頁數： | 18/31頁 |
| 文件大?。?/td> | 254K |
| 代理商： | TJA1050 |
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TJA1050 - CAN High-Speed Transceiver
Application Note
AN00020
Philips Semiconductors
18
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Typically, a bypass capacitor is used for buffering the required supply voltage. A well-dimensioned bypass
capacitor is also avoiding high current peaks flowing into the ground leads, thus establishing a “quiet”
signal ground for the transceiver.
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In order to properly dimension the V
CC
supply of CAN High-Speed Transceiver two parameters have to be
taken into account:
1.
Average supply current
The average supply current is needed to calculate the thermal load of the required V
voltage
regulator. It is estimated with the assumption that a node is continuously sending messages with a duty
cycle of 50%.
2.
Peak supply current
The peak supply current might flow in case of certain bus failure conditions for a certain time and thus
has an impact on the power supply buffering.
The V
supply of the transceiver is recommended to support the characteristics shown in Table 5.1. These
values have to be considered when calculating the thermal load of the required voltage regulator and the
required bypass capacitor.
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Table 5.1 Average and peak supply currents in normal and worst case
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During the bit transition from recessive to dominant extra supply current is required to drive the bus. It
can be calculated to
UHF
&&
GRP
&&
&&
,
,
,
B
B
=
,
where
state. Due to limited regulation speed of voltage regulators, a bypass capacitor is required to keep the
supply voltage V
constant. Otherwise, V
might leave its specified voltage range (5V
±
5%) or at least
show some oscillations due to the regulation behaviour of the voltage regulator. These oscillations are
highly unwanted because these will increase electromagnetic emission. Considering normal operation, at
least a capacitor value of 100nF is recommended for buffering. It is important to place the bypass capacitor
close to the pin "V
" (3) and pin "GND" (2). Depending on the performance of the voltage regulator
even higher capacitor values may be required.
GRP
&&
,
B
denotes the supply current in dominant state and
UHF
&&
,
B
the supply current in recessive
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TJA1050T | 制造商:NXP Semiconductors 功能描述: 制造商:NXP Semiconductors 功能描述:LAN Transceiver, Single, 8 Pin, Plastic, SOP |
| TJA1050T/CM,118 | 功能描述:CAN 接口集成電路 RoHS:否 制造商:Texas Instruments 類型:Transceivers 工作電源電壓:5 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TJA1050T/H/V,112 | 功能描述:網絡控制器與處理器 IC CAN 1MBd Silent 5V 8-Pin RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| TJA1050T/H/V,118 | 功能描述:網絡控制器與處理器 IC CAN 1MBd Silent 5V 8-Pin RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| TJA1050T/N,112 | 功能描述:網絡控制器與處理器 IC HIGH SPEED CAN TRANSCEIVER RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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