MCP14E6-ESLASHMF datasheet(13/28 Pages) MICROCHIP

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DS20005006B-page 13

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:

IQH DIQL

–





 V



Where:

IQH = Quiescent Current in the High State

D =Duty Cycle

IQL = Quiescent Current in the Low State

VDD = MOSFET Driver Supply Voltage

PCC

CC f



VDD



Where:

CC = Cross-Conduction Constant (A * sec)

f = Switching Frequency

VDD = MOSFET Driver Supply Voltage

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