Datasheet

© 2011 Microchip Technology Inc. DS25006A-page 15
MCP14E6/7/8
4.6.2 QUIESCENT POWER DISSIPATION
The power dissipation associated with the quiescent
current draw depends upon the state of the input pin.
The MCP14E6/7/8 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
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 described as:
EQUATION 4-4:
P
Q
I
QH
DI
QL
1D–() × + × ()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