參數(shù)資料
型號(hào)： PM6685TR
廠(chǎng)商： STMICROELECTRONICS
元件分類(lèi)： 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(yè)數(shù)： 31/52頁(yè)
文件大?。?/td> 2536K
代理商： PM6685TR
PM6685
Monitoring and protections
37/52
As general rule, high side MOSFETs with low gate charge are recommended, in order to
minimize driver losses.
Below there is a list of possible choices for the high side MOSFET.
The power dissipation of the low side MOSFET is given by:
Equation 19
Maximum conduction losses occur at the maximum input voltage:
Equation 20
Choose a synchronous rectifier with low RDSon. When high side MOSFET turns on, the fast
variation of the phase node voltage can bring up even the low side gate through its gate-
drain capacitance CRSS, causing cross-conduction problems. Choose a low side MOSFET
that minimizes the ratio CRSS/CGS (CGS = CISS - CRSS).
Below there is a list of some possible low side MOSFETs.
Dual n-channel MOSFETs can be used in applications with a maximum output current of
about 3 A. Below there is a list of some MOSFET manufacturers.
Table 14.
High side MOSFET manufacturer
Manufacturer
Type
Gate charge (nC)
Rated reverse voltage (V)
ST
STS12NH3LL
10
30
ST
STS17NH3LL
18
30
Table 15.
Low side MOSFET manufacturer
Manufacturer
Type
RDSon (m)
Rated reverse voltage
(V)
ST
STS17NF3LL
5.5
0.047
30
ST
STS25NH3LL
3.5
0.011
30
conduction
DLowSide
P
=
2
LOAD
max
IN
OUT
DSon
conduction
(max)
I
V
1
R
P
×
×
=
GS
RSS
C
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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(kāi)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(kāi)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(xiàn)規(guī):26-18 接線(xiàn)柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點(diǎn)電鍍:Tin over Nickel 觸點(diǎn)材料:Beryllium Copper, Phosphor Bronze 端接類(lèi)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(xiàn)規(guī):26-18 接線(xiàn)柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點(diǎn)電鍍:Tin over Nickel 觸點(diǎn)材料:Beryllium Copper, Phosphor Bronze 端接類(lèi)型:Crimp
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