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參數(shù)資料
| 型號： | TJA1054 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | CAN |
| 英文描述： | Fault-tolerant CAN transceiver(容錯CAN收發(fā)器) |
| 中文描述： | 容錯CAN收發(fā)器（容錯的CAN收發(fā)器） |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 75K |
| 代理商： | TJA1054 |
Philips Semiconductors
APPLICATION HINTS
Systems Laboratory Hamburg, Germany
Fault-tolerant CAN transceiver
V2.0
Page 11 of 16
3.5.3. Vcc extra supply current in dual fault condition
Compared to the quiescent current in recessive state the maximum
extra
supply current when the
CANH driver is turned on in dual short-circuit condition is needed to calculate the required worst case
Vcc buffer capacitance. This extra supply current has to be buffered for that time the applications
voltage regulator needs to react.
I
cc_sc2
= I
cc_sc2_dom
- I
cc_rec
(9)
3.5.4. Example calculation
Vcc extra supply current in case of dual fault condition.
Item
Symbol
PCA82C252
3,5 mA
1)
TJA1053
3,5 mA
1)
TJA1054
Min Vcc supply current, recessive
1) The minimum quiescent current is estimated since this value is not specified for the PCA82C252 and the TJA1053.
I
cc_rec
4 mA
PCA82C252
:
I
cc_sc2 252
= 140 mA - 3.5 mA =
136.5 mA max.
(Ex 9.1)
TJA1053
:
I
cc_sc2 1053
= 140 mA - 3.5 mA =
136.5 mA max.
(Ex 9.2)
TJA1054
:
I
cc_sc2 1054
= 142 mA - 4 mA =
138 mA max.
(Ex 9.3)
3.6. Calculation of worst-case bypass capacitor
Depending on the power supply concept, the required worst-case bypass capacitor can be calculated.
In case of a
separate Vcc
supply for the transceiver only, the extra supply current
I
cc_sc
in case of
the
single fault condition
has to be taken with a maximum of 6 dominant bit times.
If the transceiver and the host microcontroller are supplied from the same regulator (
shared Vcc
supply
), the extra supply current
I
cc_sc
in case of the
dual fault condition
has to be taken with a
maximum of 17 dominant bit times.
C
BUFF
=
I
cc_sc
* t
dom_max
/
V
max
(10)
The capacitor C
BUFF
is needed if the voltage regulator is
not
able to deliver any extra current within the
maximum dominant output drive t
dom_max
during the dual fault condition.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TJA1054_1008 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Fault-tolerant CAN transceiver |
| TJA1054A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Fault-tolerant CAN transceiver |
| TJA1054AT | 制造商:NXP Semiconductors 功能描述:TRANSCEIVER CAN FAULT TOL SO-14 制造商:NXP Semiconductors 功能描述:TRANSCEIVER, CAN FAULT TOL, SO-14 制造商:NXP Semiconductors 功能描述:Fault-tolerant CAN transceiver,TJA1054AT |
| TJA1054AT,512 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC HI SPD CAN TRANSCVR RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| TJA1054AT,518 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC CAN XCVR FAULT-TOL RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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