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MCP14E3 Datasheet(PDF) 14 Page - Microchip Technology

Part # MCP14E3
Description  4.0A Dual High-Speed Power MOSFET Drivers With Enable
PDF  26 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP14E3 Datasheet(HTML) 14 Page - Microchip Technology

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MCP14E3/MCP14E4/MCP14E5
DS22062B-page 14
© 2008 Microchip Technology Inc.
4.6.2
QUIESCENT POWER DISSIPATION
The power dissipation associated with the quiescent
current draw of the MCP14E3/MCP14E4/MCP14E5
depends upon the state of the input and enable pins.
Refer to the DC Characteristic table for the quiescent
current draw for specific combinations of input and
enable pin states. The quiescent power dissipation is:
EQUATION 4-3:
4.6.3
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:
EQUATION 4-4:
P
Q
I
QH
DI
QL
1
D
–
()
×
+
×
() V
DD
×
=
Where:
IQH
=
Quiescent current in the high
state
D
=
Duty cycle
IQL
=
Quiescent current in the low
state
VDD
=
MOSFET driver supply voltage
P
CC
CC
f
×
V
DD
×
=
Where:
CC
=
Cross-conduction constant
(A*sec)
f
=
Switching frequency
VDD
=
MOSFET driver supply voltage



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