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参数资料
| 型号： | TLE6363G |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 稳压器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 115 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封装： | PLASTIC, DSO-14 |
| 文件页数： | 13/28页 |
| 文件大小： | 765K |
| 代理商： | TLE6363G |
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TLE 6363
Data Sheet Rev. 1.2
20
2003-06-02
Figure 8
Buck Converter Block Diagram
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
I
BUOC)
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 VBUOVOFF = typ.
6.0 V.
AEB02947
-
+
=
thOV
V
VCC3
R
39.7
VCC4
10.3
R
GND
BUC
Pin 6
Pin 7
CC
V
1.2 V
V
CC
2.8 V
V
-
+
VCC1
VCC2
28
R
22
R
GND
=
REF
CC
V
Error
AMP
R
Prot1
200
COMP
PWM
+
-
Error-
Signal
r
tt
f tr
max
V
min
V
t
Pin 1
R
V
high
low
V
t t
rf tr
t
Error-
Ramp
Oscillator
Schmitt-trigger 1
H when
Error-Signal
<
Error-Ramp
&
R
S
Q
L when
> 175 C
j
T
Clock
Error-FF
NOR 1
1
H when
OV at VCC
L when
Overcurrent
Output Stage
OFF when H
OV
COMP
&
S
NAND 2
&
Q
&
R
PWM-FF
1
INV
OFF
ON
Gate
Driver
Power
D-MOS
Boost
Driver
Supply
BDS
Pin 10
Pin 8
BUO
COMP
UV
+
-
H when
UV at Boost
V
=
GND
thUV
4 V
V
GND
H =
OC
COMP
+
-
=
18 mV
thOC
V
L when
Overcurrent
Pin 9
Boost
V
R
18 m
Sense
GND
Ramp
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