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參數(shù)資料
| 型號： | TLE6389-3GV50 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.3 A SWITCHING CONTROLLER, 420 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | PLASTIC, SOP-14 |
| 文件頁數(shù)： | 22/38頁 |
| 文件大小： | 1233K |
| 代理商： | TLE6389-3GV50 |
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TLE 6389
Datasheet Rev. 2.1
29
2007-08-13
7.4
SI_Enable
Connecting SI_ENABLE to 5V causes SI_GND to have low impedance. Thus the SI
comparator is in operation and can be used to monitor the battery voltage. SO output
signal is valid. Connecting SI_ENABLE to GND causes SI_GND to have high
impedance. Thus the SI comparator is not able to monitor the battery voltage. SO output
signal is invalid.
7.5
Battery sense comparator - voltage divider
The formula to calculate the resistor divider for the sense comparator is basically the
same as for the feedback divider in section before. With the selected resistor RSI2, the
desired threshold of the input voltage VIN, UV and the lower sense threshold VSI, low the
resistor RSI1 is given to:
For high accuracy and low ohmic resistor divider values the On-resistance of the
SI_GND NMOS (typ. 100
) has to be added to RSI2.
7.6
Undervoltage reset - delay time
The diagram below shows the typical behavior of the reset output in dependency on the
input voltage VIN, the output voltage VVOUT or VFB.
RSI1
RSI2
VIN UV
,
VSI low
,
-------------------1
–
=
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