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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： | 13/50页 |
| 文件大小： | 1020K |
| 代理商： | TLE6266G |
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Datasheet TLE 6266 G
Version 2.21
20
July 29th, 2005
periodically activated by entering the cyclic wake HS ON mode. The autotiming period
is programable via SPI (see Table 2).This has to be done, to minimize the current
consumption depending on the cyclic wake time (see Figure 21).
In the cyclic wake mode, the PWM signal is used to switches HS3 from the cyclic HS ON
to the cyclic HS OFF state, if correctly triggered within the long open window (see Figure
17). This is called the “fail-safe PWM” feature
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.
6.13
Low Side Switches 1 & 2
The two low side outputs OUTL1 and OUTL2 are able to switch loads up to 100 mA.
Their on-resistance is 1.5
typ. @ 25°C. This switches are controlled via the SPI input
bits 5 and 6. In case of high inrush currents a built in zener circuit (typ. 37 V) activates
the switches to protect them.
The SPI diagnosis bit 14 monitors a thermal shutdown of the switches, whereas 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. The SPI output bits 5/6 are giving a
feedback about current status (ON/OFF) of OUTL1/OUTL2. 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
diagnosis bit 3. In addition the outputs OUTL1 and OUTL2 are disabled when a reset
occurs. After the second correct triggered watchdog, the switches are released for
usage.
6.14
Wake Up Pin
This pin is used to wake up the TLE 6266 with an external signal from the C. The
feature is active during cyclic HS OFF mode to switch the transceiver into the cyclic HS
ON mode before starting up the C. A correct wake up signal is a rising edge at the WK
pin during cyclic HS OFF mode. The WK pin has an implemented pull down resistance.
6.15
Timebase Test
This test is useful to measure the internal cycle time of the TLE 6266. The C may use
this information to activate special functions or routines in the cyclic wake mode, which
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