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MCP14E9/10/11
4.6.2
QUIESCENT POWER DISSIPATION
4.6.3
OPERATING POWER DISSIPATION
The power dissipation associated with the quiescent
current draw depends upon the state of the input pin.
The MCP14E9/10/11 devices have a quiescent current
draw with a Logic ' 1 ' on the input pin of 1 mA (typical)
and 300 μA (typical) with a Logic ' 0 '. The quiescent
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 as:
power dissipation is:
EQUATION 4-4:
EQUATION 4-3:
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
? 2011 Microchip Technology Inc.
Where:
CC =
f =
V DD =
P CC = CC × f × V DD
Cross-Conduction Constant (A * sec)
Switching Frequency
MOSFET Driver Supply Voltage
DS25005A-page 15
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