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January 2017
DocID028385 Rev 3
1/84
www.st.com
AN4768
Application note
SLLIMM™ 2nd series small low-loss intelligent molded module
Carmelo Mistretta, Carmelo Parisi
Introduction
The SLLIMM™ (small low-loss intelligent molded module) 2
nd
series is ST’s new family of compact, high
efficiency, dual-in-line intelligent power modules, with optional extra features. This family is designed
with a new internal configuration with only two drivers: one high-side driver and one low-side driver.
This new approach allows a more compact package and, thanks to the new features provided by low-
side driver, advanced protection functions. In addition, this new product offers the best compromise
between conduction and switching energy with outstanding robustness and EMI behavior, rendering it
ideal for improving efficiency for compressors, pumps, fans and low power motors working up to 20 kHz
in hard-switching circuitries.
Two IPM package versions are available: the full molded and the DBC (Direct Bonded Copper); both
compatible with each other.
This new series both complements and surpasses the original SLLIMM series in terms of features,
package types and flexibility.
The SLLIMM™ 2
nd
series features:
two different package technologies: DBC for improved thermal behavior, and fully molded for a cost
effective solution (both compatible with each other)
improved thermal performance (up to 20% thermal resistance reduction for DBC version)
trench field stop (TFS) IGBT technology for efficiency improvement
higher max. junction temperature of power chips (175 °C)
newly developed high-side and low-side driver pin-out arrangement for easier PCB routing
expanded line-up to 35 A
a
two different temperature monitoring options: NTC thermistor and thermal sensor
two fault events with signal output: overcurrent and undervoltage lockout
The SLLIMM 2
nd
series product family combines optimized silicon chips, integrated into three main
inverter blocks:
power stage
six short-circuit rugged IGBTs in TFS technology
six freewheeling diodes
driving network
one low voltage gate driver
one high voltage gate driver
three bootstrap diodes
protection and optional features
comparators for fault protection against overcurrent and short-circuit
two temperature monitoring options: output thermal sensor (TSO) embedded on the low-side
gate driver and NTC thermistor (optional)
a
Product portfolio extension ongoing
