DEMOBOARD TLE 6368 Infineon Technologies, DEMOBOARD TLE 6368 Datasheet - Page 53

• Manufacturer Part Number: DEMOBOARD TLE 6368
• Description: BOARD DEMO FOR TLE 6368
• Manufacturer: Infineon Technologies

Specifications of DEMOBOARD TLE 6368

• Main Purpose: DC/DC, Step Down with LDO
• Voltage - Input: 5.5 ~ 60 V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: TLE6368
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Outputs And Type: -
• Power - Output: -
• Voltage - Output: -
• Current - Output: -
• Frequency - Switching: -
• Other names: DEMOBOARDTLE6368IN

5.2.5
The voltage at the Bootstrap capacitor does not exceed 15V, a ceramic type with a
minimum of 2% of the buck output capacitance and voltage class 16V would be
sufficient.
5.2.6
Out of the feedback voltage the charge pump generates a voltage between 8 and 10V.
The fly capacitor connected between C+ and C- is charged with the feedback voltage
level and discharged to achieve the (almost) double voltage level at CCP. C
to 100nF and C
The connection of CCP to a voltage source of e.g. 7V (take care of the maximum
ratings!) via a diode improves the start-up behavior at very low battery voltage. The diode
with the cathode on CCP has to be used in order to avoid any influence of the voltage
source to the device’s operation and vice versa.
5.2.7
At the input of Buck converters a square wave current is observed causing
electromagnetical interference on the battery line. The emission to the battery line
consists on one hand of components of the switching frequency (fundamental wave) and
its harmonics and on the other hand of the high frequency components derived from the
current slope. For proper attenuation of those interferers a -type input filter structure is
recommended which is built up with inductive (L
C
higher values might not be necessary, C
input capacitance with very low ESR should be chosen and placed as close to the input
of the Buck converter as possible.
Inexpensive input filters show due to their parasitics a notch filter characteristic, which
means basically that the lowpass filter acts from a certain frequency as a highpass filter
and means further that the high frequency components are not attenuated properly. For
that reason the TLE 6368 G1 / SONIC offers the possibility of current slope adjustment.
The current transition time can be set by the external resistor (located on the SLEW pin)
to times between 20ns and 80ns by varying the resistor value between 0
transition) and 20k (slowest transition).
5.2.8
To decrease the switching losses to a minimum the external components R
and D
where the Diode D
If this feature is not needed the three components are not needed and the Boost pin (33)
can be connected directly to the IN pins(32, 30).
Data Sheet
I3
). The inductance can be chosen up to the value of the Buck converter inductance,
Boost
Bootstrap capacitor (C
External charge pump capacitors (C
Input filter components for reduced EME (C
Feedback circuit for minimum switching loss (R
are needed. The current though the feedback resistor R
CCP
Boost
to 220nF, both ceramic types.
and the capacitor C
BTP
)
I1
and C
53
Boost
FLY
I3
run a part of the load current.
I
) and capacitive components (C
should be ceramic types and for C
, C
CCP
I1
)
, C
I2
Boost
, C
I3
, C
, L
Boost
Rev. 2.2, 2006-12-01
TLE 6368 / SONIC
Boost
I
, R
is about a few mA
, D
Slew
Boost
FLY
)
Boost
)
is chosen
(fastest
, C
I1
, C
I2
Boost
an
I2
,