參數(shù)資料
型號： PM6675TR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, QCC24
封裝： 4 X 4 MM, VFQFPN-24
文件頁數(shù)： 37/50頁
文件大?。?/td> 782K
代理商： PM6675TR
Application information
PM6675
42/47
Equation 51
In order to reduce noise on the COMP pin, it's possible to introduce a resistor RINT that,
together with CINT and Cfilt, becomes a low pas filter. The cutoff frequency fCUT must be
much greater (10 or more times) than the switching frequency:
Equation 52
For most applications both RINT and Cfilt are unnecessary.
If the ripple is very small (e.g. such as with ceramic capacitors), a further compensation
network, called "Virtual ESR" network, is needed. This additional part generates a triangular
ripple that substitutes the ESR output voltage ripple. The complete compensation scheme is
represented in Figure 22.
Figure 22. Virtual ESR network
Select C as shown:
Equation 53
q
)
q
1
(
C
INT
filt
=
FILT
INT
FILT
INT
CUT
INT
C
f
2
1
R
+
π
=
Vr
CFILT
CINT
RINT
PWM Comparator
gm
+
-
+
-
1.237V
VOUT
Ton
Generation
Block
C
R
R1
L
Integrator
INT
C
5
C
>
相關(guān)PDF資料
PDF描述
PM6675 SWITCHING CONTROLLER, QCC24
PM6680ATR 0.4 A DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, QCC32
PM6680A 0.4 A DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, QCC32
PM6680TR 0.4 A DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, QCC32
PM6685TR DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, QCC32
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PM6680ATR 功能描述:DC/DC 開關(guān)控制器 Dual sync controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
PM6680TR 功能描述:DC/DC 開關(guān)控制器 No Rsense dual StepDwn Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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