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參數(shù)資料
| 型號(hào)： | MCP1405 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 4.5A Dual High-Speed Power MOSFET Drivers |
| 中文描述： | 4.5A雙高速功率MOSFET驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 11/22頁 |
| 文件大?。?/td> | 672K |
| 代理商： | MCP1405 |
2007 Microchip Technology Inc.
DS22022B-page 11
MCP1403/4/5
Placing a ground plane beneath the MCP1403/4/5 will
help as a radiated noise shield as well as providing
some heat sinking for power dissipated within the
device.
4.5
Power Dissipation
The total internal power dissipation in a MOSFET driver
is the summation of three separate power dissipation
elements.
4.5.1
CAPACITIVE LOAD DISSIPATION
The power dissipation caused by a capacitive load is a
direct function of frequency, total capacitive load, and
supply voltage. The power lost in the MOSFET driver
for a complete charging and discharging cycle of a
MOSFET is:
4.5.2
QUIESCENT POWER DISSIPATION
The power dissipation associated with the quiescent
current draw depends upon the state of the input pin.
The MCP1403/4/5 devices have a quiescent current
draw when both inputs are high of 1.0 mA (typ) and
0.15 mA (typ) when both inputs are low. The quiescent
power dissipation is:
4.5.3
OPERATING POWER DISSIPATION
The operating power dissipation occurs each time the
MOSFET driver output transitions because for a very
short period of time both MOSFETs in the output stage
are on simultaneously. This cross-conduction current
leads to a power dissipation describes as:
P
T
P
L
P
Q
P
CC
+
+
=
Where:
P
T
= Total power dissipation
P
L
= Load power dissipation
P
Q
= Quiescent power dissipation
P
CC
= Operating power dissipation
P
L
f
C
T
×
V
DD
2
×
=
Where:
f = Switching frequency
C
T
= Total load capacitance
V
DD
= MOSFET driver supply voltage
P
Q
I
QH
D
I
QL
1
D
–
(
)
×
+
×
(
)
V
DD
×
=
Where:
I
QH
= Quiescent current in the high state
D = Duty cycle
I
QL
= Quiescent current in the low state
V
DD
= MOSFET driver supply voltage
P
CC
CC
f
×
V
DD
×
=
Where:
CC = Cross-conduction constant (A*sec)
f = Switching frequency
V
DD
= MOSFET driver supply voltage
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCP1405-E/MF | 功能描述:功率驅(qū)動(dòng)器IC 4.5A Dual MOSFET Drvr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MCP1405-E/P | 功能描述:功率驅(qū)動(dòng)器IC 4.5A Dual MOSFET RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MCP1405-E/SN | 功能描述:功率驅(qū)動(dòng)器IC 4.5A Dual RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MCP1405-E/SO | 功能描述:功率驅(qū)動(dòng)器IC 4.5A Dual MOSFET Drvr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
| MCP1405T-E/MF | 功能描述:功率驅(qū)動(dòng)器IC 4.5A Dual MOSFET Drvr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時(shí)間: 下降時(shí)間: 電源電壓-最大:30 V 電源電壓-最小:2.75 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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