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VNH7070AS Datasheet(PDF) 29 Page - STMicroelectronics

No. de pieza VNH7070AS
Descripción Electrónicos  Automotive fully integrated H-bridge motor driver
PDF  38 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VNH7070AS Datasheet(HTML) 29 Page - STMicroelectronics

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VNH7070AS
Package and PCB thermal data
37
Figure 24. Auto and mutual Rthj-amb vs. PCB heat-sink area in open box free air
condition
4.2.2
Thermal characterization during transients
Ths= Pdhs • Zhs + Zhsls • (PdlsA + PdlsB) + Tamb
TlsA= PdlsA • Zls + Pdhs • Zhsls + PdlsB • Zlsls + Tamb
TlsB= PdlsB • Zls + Pdhs • Zhsls + PdlsA • Zlsls + Tamb
Table 15. Thermal model for junction temperature calculation in steady-state
conditions\
Chip 1
Chip 2 Chip 3
Tjchip1
Tjchip2
Tjchip3
ON
OFF
ON
Pdchip1 • RthA + Pdchip3
• RthAC + Tamb
Pdchip1 • RthAB + Pdchip3
• RthBC + Tamb
Pdchip1 • RthAC + Pdchip3
• RthC + Tamb
ON
ON
OFF
Pdchip1 • RthA + Pdchip2
• RthAB + Tamb
Pdchip1 • RthAB + Pdchip2
• RthB + Tamb
Pdchip1 • RthAC + Pdchip2
• RthBC + Tamb
ON
OFF
OFF
Pdchip1 • RthA+ Tamb
Pdchip1 • RthAB + Tamb
Pdchip1 • RthAC + Tamb
ON
ON
ON
Pdchip1 • RthA + (Pdchip2
+ Pdchip3) • RthAB + T
amb
Pdchip2 • RthB + Pdchip1 •
RthAB + Pdchip3 • RthBC
+ Tamb
Pdchip1 • RthAB + Pdchip2
• RthBC + Pdchip3 • RthC
+ Tamb



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