TLE 6363 Infineon Technologies, TLE 6363 Datasheet - Page 16

• Manufacturer Part Number: TLE 6363
• Manufacturer: Infineon Technologies

Specifications of TLE 6363

• Packages: P-DSO-14
• Comment: Please use RoHS compliant TLE6711
• Vq (max): 5.0V
• Iq (max): 250.0 mA
• Iq (typ): 1,500.0 µA
• Output: Boost/Buck Conv.

Boost Converter
The TLE 6363 contains a fully integrated boost converter (except the boost-diode),
which provides a supply voltage for an energy reserve e.g. an airbag firing system. The
regulated boost output voltage
resistors) providing the feedback voltage for the boost feedback pin BOFB. The energy
which is stored in the external electrolytic capacitor at
airbag firing, even if the battery is disconnected by a car crash.
The boost inductance
limited power DMOS transistor with a programmable (external resistor
An internal bandgap reference provides a temperature independent, on chip trimmed
reference voltage for the regulation loop. An error amplifier compares the reference
voltage with the boost feedback signal
(determination of the output boost voltage
Application note for programming the output voltage at pin
V
With a PWM (Pulse Width Modulation) comparator the output of the error amplifier is
compared to a periodic linear ramp, provided by a sawtooth signal of the oscillator
connected to pin R. A logic signal with variable pulse width is generated. It passes
through the logic circuits (sets the output latch PWM-FF) and driver circuits to the power
switching DMOS. The Schmitt-trigger output resets the output flip-flop PWM-FF by
NOR 2. The PWM signal is gated by the NAND 2 to guarantee a dominant reset.
Data Sheet Rev. 1.2
BOOST
=
V
BOFBTH
×
(
------------------------------------ -
R
L
BO1
BO
R
BO2
(typ. 100 µH) is PWM-switched by an integrated current
+
R
V
BO2
BOOST
)
is programmable by a divider network (external
V
16
V
BOOST
BOFB
).
from the external divider network
V
V
BOOST
BOOST
:
guarantees accurate
R
R
) frequency.
TLE 6363
2003-06-02