參數(shù)資料
型號： PM6685TR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, QCC32
封裝： 5 X 5 MM, 1 MM HEIGHT, 0.50 MM PITCH, LEAD FREE, VFQFPN-32
文件頁數(shù)： 16/52頁
文件大小： 2536K
代理商： PM6685TR
PM6685
Device description
23/52
Figure 29. Constant ON-time block diagram
7.3
Output ripple compensation
In a classic Constant On Time control, the system regulates the valley value of the output
voltage and not the average value, as shown in Figure 28 on page 21. In this condition, the
output voltage ripple is source of a DC static error.
To compensate this error, an integrator network can be introduced in the control loop, by
connecting the output voltage to the COMP5/COMP3(for the 5V and 3.3V sections
respectively) pin through a capacitor CINT as in Figure 30 on page 24.
+
-
HS
driver
Level
shifter
LS
driver
Q
R
S
LDO5
Q
R
S
PWM
Comparator
Positive
Current Limit
Vr
+
-
Zero
Zero--cross.
cross.
Comp.
bandgap
1.236V
SKIP
VREF
PHASE
PGND
LGATE
HGATE
BOOT
CSENSE
-
COMP
gm
OUT
RFb1
RFb2
Vr
+
-
Toff
Toff--min
min
Ton
+
-
VIN
0.5V
+
-
0.5V
+
-
0.25V
LDO5
+
-
HS
driver
Level
shifter
LS
driver
Q
R
S
LDO5
Q
R
S
PWM
Comparator
Positive
Current Limit
Vr
+
-
Zero
Zero--cross.
cross.
Comp.
bandgap
1.236V
SKIP
VREF
PHASE
PGND
LGATE
HGATE
BOOT
CSENSE
-
COMP
gm
OUT
RFb1
RFb2
Vr
+
-
+
-
Toff
Toff--min
min
Ton
+
-
VIN
0.5V
+
-
0.5V
+
-
0.5V
+
-
0.25V
+
-
0.25V
LDO5
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PM6686 制造商:STMicroelectronics 功能描述:
PM6686TR 功能描述:DC/DC 開關(guān)控制器 Step-down Controller w/adj. voltages-dual 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
PM6-6F-L 功能描述:端子 Metric Fork Terminal non-insulated, 4.0 RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點電鍍:Tin over Nickel 觸點材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp
PM6-6R-D 制造商:Panduit Corp 功能描述:
PM6-6R-L 功能描述:端子 Metric Ring Terminal non-insulated, 2.5 RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點電鍍:Tin over Nickel 觸點材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp
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