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| 型號： | TLE6711G |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO14 |
| 封裝： | PLASTIC, SOP-14 |
| 文件頁數(shù)： | 6/25頁 |
| 文件大?。?/td> | 963K |
| 代理商： | TLE6711G |
Data Sheet
14
Rev. 3.4, 2007-08-16
TLE 6711
Circuit Description
External loop compensation is required for converter stability, and is formed by connecting a compensation
resistor-capacitor series-network (
R
BUC, CBUC) between pin BUC and GND.
In the case of overload or short-circuit at
V
CC (the output current exceeds the buck overcurrent threshold IBUOC)
the DMOS output transistor is switched off by the overcurrent comparator immediately. The pulse width is then
controlled by the overcurrent comparator as seen before in the boost description.
In order to protect the
V
CC input as well as the external load against catastrophic failures, an overvoltage protection
is provided which switches the output transistor off as soon as the voltage at pin
V
CC exceeds the internal fixed
overvoltage threshold
V
BUOVOFF = typ. 6.0 V.
Figure 11
Most Important Waveforms of the Buck Converter Circuit
AED02673
t
C
V
Error
V
and
V
CV
CP
V
t
L
H
OCLK
PWM
L
H
t
I
BUO
BULI
I
DBU
I
t
BUO
V
t
BOOST
V
CC5
V
Overcurrent Threshold Exceeded
Controlled by the
Load-Current Increasing with Time;
Error Voltage
Overcurrent Comp
Controlled by the Error Amp
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