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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)： | 32/52頁 |
| 文件大?。?/td> | 2536K |
| 代理商： | PM6685TR |
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Monitoring and protections
PM6685
38/52
A rectifier across the low side MOSFET is recommended. The rectifier works as a voltage
clamp across the synchronous rectifier and reduces the negative inductor swing during the
dead time between turning the high-side MOSFET off and the synchronous rectifier on. It
can increase the efficiency of the switching section, since it reduces the low side switch
losses. A schottky diode is suitable for its low forward voltage drop (0.3V). The diode reverse
voltage must be greater than the maximum input voltage VINmax. A minimum recovery
reverse charge is preferable. Below there is a list of some schottky diode manufacturers.
8.11
Closing the integrator loop
The design of external feedback network depends on the output voltage ripple. If the ripple
is higher than approximately 30mV, the feedback network (Figure 36) is usually enough to
keep the loop stable.
Figure 36. Circuitry for output ripple compensation
Table 16.
Dual MOSFET manufacturer
Manufacturer
Type
RDSon (m)
Gate charge (nC)
Rated reverse
voltage (V)
ST
STS8DNH3LL
25
10
30
ST
STS4DNF60L
65
32
60
Table 17.
Schottky diode manufacturer
Manufacturer
Series
Forward voltage
(V)
Rated reverse
voltage (V)
Reverse current
(uA)
ST
STPS1L30M
0.34
30
0.00039
ST
STPS1L20M
0.37
20
0.000075
+
-
Vr
-
COMP
gm
OUT
RFb1
RFb2
Vr
+
PWM
Comparator
CINT
RINT
CFILT
t
Vr
COUT
COMP PIN
VOLTAGE
L
D
OUTPUT VOLTAGE
I=gm(V1-Vr)
V1
t
V
VCINT
ROUT
+
-
Vr
--
COMP
gm
OUT
RFb1
RFb2
Vr
+
PWM
Comparator
CINT
RINT
CFILT
t
Vr
COUT
COMP PIN
VOLTAGE
L
D
OUTPUT VOLTAGE
I=gm(V1-Vr)
V1
t
V
VCINT
ROUT
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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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