VNH7013XP-E datasheet(17/24 Pages) STMICROELECTRONICS

17 / 24 page

VNH7013XP-E

Package and PCB thermal data

Doc ID 022370 Rev 3

17/24

3.1.2

Thermal resistances definition (values according to the PCB heatsink

area)

RthHS = RthHSA = RthHSB = High Side Chip Thermal Resistance Junction to Ambient (HSA or

HSB in ON state)

RthLS = RthLSA = RthLSB = Low Side Chip Thermal Resistance Junction to Ambient

RthHSLS = RthHSALSB = RthHSBLSA = Mutual Thermal Resistance Junction to Ambient

between High Side and Low Side Chips

RthLSLS = RthLSALSB = Mutual Thermal Resistance Junction to Ambient between Low Side

Chips

3.1.3

Thermal calculation in transient mode(a)

TjHSAB = ZthHS x PdHSAB + ZthHSLS x (PdLSA + PdLSB) + Tamb

TjLSA = ZthHSLS x PdHSAB + ZthLS x PdLSA + ZthLSLS x PdLSB + Tamb

TjLSB = ZthHSLS x PdHSAB + ZthLSLS x PdLSA + ZthLS x PdLSB + Tamb

3.1.4

Single pulse thermal impedance definition (values according to the

PCB heatsink area)

ZthHS = High Side Chip Thermal Impedance Junction to Ambient

ZthLS = ZthLSA = ZthLSB = Low Side Chip Thermal Impedance Junction to Ambient

ZthHSLS = ZthHSABLSA = ZthHSABLSB = Mutual Thermal Impedance Junction to Ambient

between High Side and Low Side Chips

ZthLSLS = ZthLSALSB = Mutual Thermal Impedance Junction to Ambient between Low Side

Chips

Equation 1: pulse calculation formula

Calculation is valid in any dynamic operating condition. Pd values set by user.

δ Z

THtp

–

()

where

⁄

VNH7013XP-E Datasheet(PDF) 17 Page - STMicroelectronics