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AN3338 Datasheet(PDF) 8 Page - STMicroelectronics

Part # AN3338
Description  In recent years the variable speed motor control market has required high performance
PDF  72 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3338 Datasheet(HTML) 8 Page - STMicroelectronics

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Inverter design concept and SLLIMM solution
AN3338
8/72
Doc ID 18441 Rev 4
•
NTC thermistor for temperature monitor
•
open emitter configuration for individual phase current sensing
•
DBC fully isolated package for enhanced thermal behavior
•
isolation voltage rating of 2500 VRMS
•
several passive components for IGBT switching speed optimum setting
•
gate driver proper biasing and noise filtering.
Figure 3 shows the block diagram of SLLIMM included in the inverter solution
The power devices (IGBTs and freewheeling diodes), incorporated in the half bridge block,
are tailored for a motor drive application delivering the greatest overall efficiency, thanks to
the optimized trade-off between conduction and switching power losses and very low EMI
generation, as a result of reduced dV/dt and di/dt.
The IC gate drivers have been selected in order to meet two levels of functionality giving the
designers more freedom to choose: a basic version which includes the essential features for
a cost-effective solution and a fully featured version which provides advanced options for a
sophisticated control method.
The fully isolated SDIP package is available in a 25-lead version (SDIP-25L) and 38-lead
version (SDIP-38L) and offers excellent heat dissipation characteristics, thanks to the state
of the art DBC mounting technology, ensuring at the same time, very high voltage isolation
rating (2500 VRMS), compact size and high reliability.
Figure 3. SLLIMM block diagram
SLLIMM
Gate driver
Gate driver
Gate driver
Half bridge
NTC
temperature
monitoring
UVLO /
Dead time
Level
Shift
Bootstrap
diode
Comparator
Smart
Shut Down
Op-Amp
UVLO /
Dead time
Level
Shift
Bootstrap
diode
Comparator
Smart
Shut Down
Op-Amp
UVLO /
Dead time
Level
Shift
Bootstrap
diode
Comparator
Smart
Shut Down
Op-Amp
Half bridge
Half bridge
Bridge rectifier
Microcontroller
M
Feedback
Mains



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