TLE 6389-3G V50 Infineon Technologies, TLE 6389-3G V50 Datasheet - Page 29

• Manufacturer Part Number: TLE 6389-3G V50
• Manufacturer: Infineon Technologies

Specifications of TLE 6389-3G V50

• Packages: PG-DSO-14
• Comment: Vin up to 60V; external MOS
• Vq (max): 5.0V
• Iq (max): 2,300.0 mA
• Iq (typ): 130.0 µA
• Output: Buck Converter

Datasheet Rev. 2.1
7.4
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
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 R
desired threshold of the input voltage V
resistor R
For high accuracy and low ohmic resistor divider values the On-resistance of the
SI_GND NMOS (typ. 100 ) has to be added to R
7.6
The diagram below shows the typical behavior of the reset output in dependency on the
input voltage V
SI1
SI_Enable
Battery sense comparator - voltage divider
Undervoltage reset - delay time
is given to:
IN
, the output voltage V
R
SI1
=
R
VOUT
SI2
IN, UV
29
or V


V
------------------ - 1
V
and the lower sense threshold V
IN UV
SI low
FB
.
SI2
.
–


TLE 6389
2007-08-13
SI, low
SI2
, the
the