L6204D datasheet(9/12 Pages) STMICROELECTRONICS

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L6204D Fiches technique(PDF) 9 Page - STMicroelectronics

No de pièce	L6204D

Description	DMOS DUAL FULL BRIDGE DRIVER

PDF	12 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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9 / 12 page

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L6204

FALL TIME Tf

For this example it is assumed that the energy dissipated in this part of the cycle takes the same form as

that shown for the rise time :

EON/OFF = [RDS(ON) · IL · Tf] · 2/3

QUIESCENT ENERGY

The last contribution to the energy dissipation is due to the quiescent supply current and is given by :

EQUIESCENT = IQUIESCENT · VS · T

TOTAL ENERGY PER CYCLE

ETOT = (EOFF/ON + EON + ECOM + EON/OFF) bridge 1 + (EOFF/ON + EON + ECOM + EON/OFF)bridge 2 +

+ EQUIESCENT

The Total Power Dissipation PDIS is simply :

PDIS = ETOT/T

Tr = Rise time

TON = ON time

Tf = Fall Time

Td = Dead time

T = Period

T = Tr + TON + Tf + Td

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