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參數(shù)資料
| 型號： | MCP1402 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Tiny 500 mA, High-Speed Power MOSFET Driver |
| 中文描述： | 小500毫安，高速功率MOSFET驅(qū)動器 |
| 文件頁數(shù)： | 11/20頁 |
| 文件大?。?/td> | 187K |
| 代理商： | MCP1402 |
2007 Microchip Technology Inc.
DS22052A-page 11
MCP1401/02
4.5
Power Dissipation
The total internal power dissipation in a MOSFET driver
is the summation of three separate power dissipation
elements.
EQUATION 4-1:
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 shown in
Equation 4-2
.
EQUATION 4-2:
4.5.2
QUIESCENT POWER DISSIPATION
The power dissipation associated with the quiescent
current draw depends upon the state of the input pin.
The MCP1401/02 devices have a quiescent current
draw when the input is high of 850 mA (typ) and
100 mA (typ) when the input is low. The quiescent
power dissipation is shown in
Equation 4-3
.
EQUATION 4-3:
P
Q
=
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 described in
Equation 4-4
.
EQUATION 4-4:
P
T
P
L
P
Q
P
CC
+
+
=
Where:
P
T
P
L
P
Q
P
CC
=
=
=
=
Total power dissipation
Load power dissipation
Quiescent power dissipation
Operating power dissipation
P
L
f
C
T
×
V
DD
2
×
=
Where:
f
=
=
=
Switching frequency
Total load capacitance
MOSFET driver supply voltage
C
T
V
DD
I
QH
D
I
QL
1
D
–
(
)
×
+
×
(
)
V
DD
×
Where:
I
QH
=
Quiescent current in the high
state
Duty cycle
Quiescent current in the low
state
MOSFET driver supply voltage
D
=
=
I
QL
V
DD
=
P
CC
CC
f
×
V
DD
×
=
Where:
CC
=
Cross-conduction constant
(A*sec)
Switching frequency
MOSFET driver supply voltage
f
=
=
V
DD
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| MCP1402T-E/MC | 功能描述:功率驅(qū)動器IC 05A Sngl MOSFET Driver RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 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 |
| MCP1402T-E/OT | 功能描述:功率驅(qū)動器IC 0.5A Sngl MOSFET Drvr RoHS:否 制造商:Micrel 產(chǎn)品:MOSFET Gate Drivers 類型:Low Cost High or Low Side MOSFET Driver 上升時間: 下降時間: 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 |
| MCP1403 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:4.5A Dual High-Speed Power MOSFET Drivers |
| MCP1403-E/MF | 功能描述:功率驅(qū)動器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 上升時間: 下降時間: 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 |
| MCP1403-E/P | 功能描述:功率驅(qū)動器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 上升時間: 下降時間: 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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