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| 型号： | TLE6266G |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封装： | 18 MM, PLASTIC, SOP-28 |
| 文件页数： | 11/50页 |
| 文件大小： | 1020K |
| 代理商： | TLE6266G |
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Datasheet TLE 6266 G
Version 2.21
19
July 29th, 2005
Watchdog Trigger Failure
If the trigger signal does not meet the open window a watchdog reset is created by
setting the reset output RO low for tWDR. Then the watchdog starts again by opening the
long open window. In addition, the SPI output bit 2 is set HIGH until the next successful
watchdog trigger, to monitor a watchdog reset. SPI output bit 2 is also HIGH until the
watchdog is correctly triggered after power-up/start-up. For fail safe reasons the
TLE6266 is automatically switched in Vbat stand-by mode if a watchdog trigger failure
occurs.
6.10
High Side Switch 1
The high side output OUTH1 is able to switch loads up to 250 mA. Its on-resistance is
1.0
typ. @ 25°C. This switch can be controlled either via the PWM input or the SPI
input bit 1. When the input PWM is used, it has to be enabled by setting the SPI input bit
11 HIGH. In case of both control inputs being active the PWM signal is masked by the
SPI signal (see Figure 16, High Side Switch 1 Timing Diagram).
The SPI output bit 14 monitors a thermal shutdown of the switches, whereas output bit
4 flags a thermal prewarning. So the microcontroller is able to reduce the power
dissipation of the TLE 6266 by switching off functions of minor priority before the
temperature threshold of the thermal shutdown is reached. Further OUTH1 is protected
against short circuit and overload. The SPI output bit 1 indicates an overload of OUTH1.
As soon as the under-voltage condition of the supply voltage is met (VS < VUVOFF), the
switches are automatically disabled by the under-voltage lockout circuit. This is flagged
by the SPI output bit 3. Moreover the switch is disabled when a reset occurs. After the
second correct triggered watchdog, the switch is released for usage.
6.11
High Side Switch 2
The high side output OUTH2 is able to switch loads up to 250 mA. Its on-resistance is
1.0
typ. @ 25°C. This switch is controlled via the SPI input bit 2.
The SPI output bit 14 monitors a thermal shutdown of the switches, whereas output bit
4 flags a thermal prewarning. So the microcontroller is able to reduce the power
dissipation of the TLE 6266 by switching off functions of minor priority before the
temperature threshold of the thermal shutdown is reached. As soon as the under-voltage
condition of the supply voltage is met (VS < VUVOFF), the switches are automatically
disabled by the under-voltage lockout circuit. This is flagged by the SPI output bit 3.
Moreover the switch is disabled when a reset occurs. After the second correct triggered
watchdog, the switch is released for usage.
6.12
High Side Switch 3
The high side output OUTH3 is able to switch loads up to 250 mA. Its ON-resistance is
1.0
typ. @ 25°C. This switch is controlled via the SPI input bits 3 and 4. To supply
external wake-up circuits in low power mode (cyclic wake mode), the output OUTH3 is
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