TLE 6711G Infineon Technologies, TLE 6711G Datasheet - Page 12

• Manufacturer Part Number: TLE 6711G
• Manufacturer: Infineon Technologies

Specifications of TLE 6711G

• Packages: PG-DSO-14
• Comment: -
• Vq (max): 5.0V
• Iq (max): 250.0 mA
• Iq (typ): 1,500.0 µA
• Output: Boost/Buck Conv.

The TLE 6711 G/GL is also protected against several boost loop errors:
In case of a feedback interruption a pull-up current source (
voltage at the feedback pin BOFB above the reference voltage. The boost output is switched off by the high error
voltage which controls the PWM-Comparator at a zero duty cycle.
In the case of a resistive loop error caused by leakage currents to ground, the boost output voltage would increase
to very high values. In order to protect the
an overvoltage protection is provided which switches the output transistor off as soon as the voltage at pin
exceeds the internal fixed overvoltage threshold
Application Note
A short circuit from
the boost inductance if there is no overcurrent limitation in that path.
Figure 9
Data Sheet
Most Important Waveforms of the Boost Converter Circuit
V
OCLK
V
PWM
BOOST
I
V
I
I
and
Error
DBO
V
V
V
BOI
BOLI
BOI
V
V
CP
CV
C
BOOST
H
H
L
L
S
to ground will not destroy the IC, however, it may damage the external boost diode or
Load-Current Increasing with Time;
Error Voltage
Controlled by the Error Amp
V
BOOST
V
input as well as the external load against catastrophic failures,
BOOVOFF
12
Overcurrent Threshold Exceeded
= typ. 37 V.
I
FB
typ. 0.4 A), integrated at pin BOFB pulls the
Overcurrent Comp
Controlled by the
AED02672
Rev. 3.4, 2007-08-16
Circuit Description
t
t
t
t
t
t
TLE 6711
V
BOOST