VNH2SP30 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

VNH2SP30

Automotive fully integrated H-bridge motor driver

STMicroelectronics 

VNH2SP30-E

Package and PCB thermal data

4.1.1

Thermal calculation in clockwise and anti-clockwise operation in

steady-state mode

Table 15. Thermal calculation in clockwise and anti-clockwise operation in steady-

state mode

HSA HSB LSA LSB

TjHSAB

TjLSA

TjLSB

ON

OFF

OFF

ON

OFF

ON

ON

PdHSA x RthHS + PdLSB

x RthHSLS + Tamb

OFF

PdHSB x RthHS + PdLSA

x RthHSLS + Tamb

PdHSA x RthHSLS +

PdLSB x RthLSLS + Tamb

PdHSB x RthHSLS +

PdLSA x RthLS + Tamb

PdHSA x RthHSLS + PdLSB

x RthLS + Tamb

PdHSB x RthHSLS + PdLSA

x RthLSLS + Tamb

4.1.2

4.1.3

Thermal resistance definitions (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

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

4.1.4

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

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

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