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參數(shù)資料
| 型號(hào)： | TLE8366EV33 |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, PDSO8 |
| 封裝： | GREEN, PLASTIC, MS-012, SOP-8 |
| 文件頁(yè)數(shù)： | 6/19頁(yè) |
| 文件大小： | 1358K |
| 代理商： | TLE8366EV33 |
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Data sheet
14
Rev. 1.0, 2009-05-18
TLE8366
Application Information
8
Application Information
Note: The following information is given as a hint for the implementation of the device only and shall not be
regarded as a description or warranty of a certain functionality, condition or quality of the device.
8.1
Frequency Compensation
The stability of the output voltage can be achieved with a simple RC connected between pin COMP and GND. The
standard configuration using the swiching frequency of the internal oscillator is a ceramic capacitor
C
COMP =22nF
and
R
COMP =22k. By slight modifications to the compensation network the stability can be optimized for different
application needs, such as varying switching frequency (using the sychronizing function), different types of buck
capacitor (ceramic or tantalum) etc.
The compensation network is essential for control loop stability. Leaving pin COMP open might lead to instable
operation.
8.2
Compensating a tantalum buck capacitor
CBU1
The control loop is optimized for use of ceramic buck capacitors
C
BU. In order to maintain stability also for tantalum
capacitors with ESR up to 300m
, an additional compensation capacitance CCOMP2 at pin COMP to GND is
required. It’s value calculates:
C
COMP2 = CBU * ESR(CBU) / RCOMP ,
whereas
C
COMP2 needs to stay below 5nF.
Figure 5
High-ESR buck capacitor compensation
8.3
Catch Diode
In order to minimize losses and for fast recovery, a schottky catch diode is required. Disconnecting the catch diode
during operation might lead to destruction of the IC.
2
GND
3
COMP
TLE8366
CCOMP
RCOMP
CCOMP2
Application _C-COMP2.vsd
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