TDA5211XT Infineon Technologies, TDA5211XT Datasheet - Page 32

• Manufacturer Part Number: TDA5211XT
• Manufacturer: Infineon Technologies

Specifications of TDA5211XT

• Operating Temperature (min): -40C
• Operating Temperature Classification: Automotive
• Product Depth (mm): 4.4mm
• Product Length (mm): 9.7mm
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / Rohs Status: Compliant

Wireless Components
This circuit charges the capacitor C with an inrush current I
220µA for a duration of T
equal to the voltage U
2.5V. As soon as these voltages are equal or the duration T
precharge circuit is disabled.
as the sum of R1 and R2 is sufficiently large and thus can be neglected. T2 can
then be calculated according to the following formula:
The voltage transient during the charging of C2 is shown in the following figure:
Figure 4-11
The voltage appearing on the capacitor C connected to pin 20 is shown in the
following figure. It can be seen that due to the fact that it is charged by a con-
stant current source it exhibits is a linear increase in voltage which is limited to
U
input. The time constant appearing in this case can be denoted as T3, which
can be calculated with
2
2
Smax
is the time constant of the charging process of C which can be calculated as
20k
T3
= 2.5V which is also the approximate operating point of the data filter
T
2
=
· C2
2.4V
3V
Voltage appearing on C2 during precharging process
U
----------------------- -
2
220 A
U2
Smax
ln
§
¨
¨
¨
¨
©
1
C
s
4 - 12
2
1
at the input of the data filter. This voltage is limited to
3
4 .
V
=
2
V
until the voltage U
---------------- - C
220 A
·
¸
¸
¸
¸
¹
2.5V
2
2
1
6 .
T2
c
appearing on the capacitor is
Specification, May 2001
2
is exceeded the
load
Applications
TDA 5211
of typically
e-fkt1.WMF