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| 型号： | TLE7368-2E |
| 厂商： | Infineon Technologies |
| 文件页数： | 33/41页 |
| 文件大小： | 0K |
| 描述： | IC PS SYSTEM MULTI VOLT PGDSO-36 |
| 标准包装： | 1,000 |
| 应用： | 电源，汽车应用 |
| 输入电压： | 4.5 V ~ 45 V |
| 输出数： | 3 |
| 输出电压： | 5V，3.3V，1.2V |
| 工作温度： | -40°C ~ 150°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-BSSOP（0.433"，11.00mm 宽）裸露焊盘 |
| 供应商设备封装： | PG-DSO-36 |
| 包装： | 带卷 (TR) |
| 其它名称： | SP000768086 TLE73682EXUMA1 |
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TLE7368
Detailed Internal Circuits Description
5.10
Watchdog Circuit
WDO = LOW
Always
Ignore
Window
Trigger During
Closed Window
No Trigger During
Open Window
Trigger
Always
Closed
Window
No Trigger
Open
Window
AEA03533.VSD
Figure 8
Window Watchdog State Diagram
Principle of Operation:
A Window Watchdog is integrated in the TLE7368 to monitor a microcontroller. The Window Watchdog duty cycle
consists of an "Open window" and a "Closed window". The microcontroller that is being monitored has to send a
periodic falling edge trigger signal to the watchdog input pin WDI within the "Open Window". If a trigger signal is
not sent or if it is sent during the "Closed Window", then Watchdog Output (WDO) switches from high to low
signaling a potential microcontroller fault has occurred. The watchdog cycle time T WD is derived from the time base
T Cycle . An external capacitor connected between pins RT and GND determines T Cycle .
Initialization:
The Watchdog is switched off per default and activated by pulling WDI to low at least for the time t WD,start after RO_2
has turned to high. Watchdog input pin WDI has an integrated pull-up resistor R WDI connected to Q_LDO2. If WDI
transitions to high before t WD,start has elapsed, then the watchdog will not start operation. To initialize the Watchdog
the watchdog input WDI should transition to high within the "Ignore Window". The WDI signal may also transition
to high during the following "Open Window", but sufficient time must be left for a falling edge transition before the
end of the "Open Window". The watchdog function is turned off following a RO_2 reset, and must be reinitialized
to be turned back on.
Normal Operation:
The Watchdog starts operating in the "Ignore Window" state for a duration of t WD,IW . Within the "Ignore Window"
the microcontroller is given time to initialize. Any signal to watchdog input WDI within the "Ignore Window" is
ignored. After time t WD,IW , the watchdog transitions from the "Ignore Window" state to the "Open Window" state for
a maximum duration of t WD,W . Within the "Open Window" a valid trigger signal must be applied to the watchdog
Data Sheet
33
Rev. 2.1, 2010-11-22
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TLE73682EXT | 功能描述:直流/直流开关转换器 DC/DC RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TLE73682EXUMA1 | 制造商:Infineon Technologies AG 功能描述:Micro Controller Supply 36-Pin DSO 制造商:Infineon Technologies AG 功能描述:DC/DC CONVERTER - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC PS SYSTEM MULTI VOLT PGDSO-36 |
| TLE7368-3E | 功能描述:直流/直流开关转换器 DC/DC RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TLE73683EXT | 功能描述:直流/直流开关转换器 DC/DC RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| TLE73683EXUMA1 | 制造商:Infineon Technologies AG 功能描述:Micro Controller Supply 制造商:Infineon Technologies AG 功能描述:DC/DC CONVERTER - Tape and Reel 制造商:Infineon Technologies AG 功能描述:IC PS SYSTEM MULTI VOLT PGDSO-36 |
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