New-Tech Europe | May 2017

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new products
introduces a new logic level IR MOSFET™ family. It
comprises three different voltage classes, 60 V, 80 V, and
100 V. The new devices are available in a 2 mm x 2 mm
PQFN package which is perfect for form-factor critical
wireless charging, adapter, and telecom applications. The
small package size enables higher power density and
improved efficiency. At the same time it is saving space,
reducing parts count, and reducing overall system cost.
The new IR MOSFET devices in the PQFN package deliver
between 11 and 40 percent lower RDS(on) than competitive
products. The ultra-low gate charge (Q g) reduces switching
losses without increasing conduction losses. In addition,
the output capacitance (C OSS) and reverse recovery
charge (Q rr) have been optimized, the FOM g (R DS(on) x
Q g/gd) improved. This allows the IR MOSFET devices to
operate at high switching frequencies of up to 6.78 MHz –
as required in resonant wireless charging applications. The
logic level gate drive provides a low gate threshold voltage
(V GS(th)) which means that the MOSFETs can be driven
at 5 V and directly from microcontrollers.
Availability
The IR MOSFET family is available now in 60 V and 80 V,
with a 100 V device in development. Further information is
available at
Next-Generation Automotive Door-Zone
Controllers from STMicroelectronics Bring Power
Management and Failsafe Circuitry On-Chip
STMicroelectronics has advanced the state of the art
in automotive door-zone controllers with a new family of
monolithic devices that integrate power-management and
failsafe circuitry previously implemented using external
devices.
The new L99DZ100G/GP for front-door applications and
L99DZ120 for rear-door controls enable designers to save
space as well as boost reliability and energy efficiency. With
the added advantage of software compatibility between the
family members, they also help simplify development and
accelerate time to market.
ST’s advanced, proprietary BCD8S automotive technology
provides the key to achieving this unique single-chip
solution that meets power-management and failsafe
demands in door-zone applications with features that
include embedded Half-bridge and high-side drivers up to
current ratings of 7.5A. There are also High-Speed CAN
(HS-CAN) and LIN 2.2a (SAE J 2602) interfaces, control
blocks, and protection circuitry. The L99DZ100GP adds
support for ISO 11898-6 HS-CAN selective wake-up that
maximizes energy savings by allowing infrequently-used
Electronic Control Units (ECU) to remain powered down
while connected to the CAN bus.
Both front-door controller variants integrate MOSFET
Half-bridges for driving up to five DC motors and can also
drive an external H-bridge. In addition, there are eight LED
drivers and a further two drivers for bulbs, a gate driver for
a mirror heater, and a control module for electro-chrome
glass. Voltage regulators for external circuitry such as a
microcontroller and sensors, as well as associated timers,
watchdogs, reset generators, and protection are also
provided. The L99DZ120 contains similar features, tailored
to requirements for rear doors, including motor drivers for
electric windows.
Further value-added features include automatic LED
duty-cycle compensation to ensure consistent brightness
as the vehicle supply-voltage (VS) fluctuates. In addition,
innovative thermal clusters allow outputs to be disabled
individually if an event such as a short-circuit occurs. This
enables unaffected outputs to operate normally, ultimately
delivering a superior end-user experience.
The L99DZ100G/GP and L99DZ120 are in production now,
packaged as LQFP64 devices. Please contact your local
ST sales office for pricing and more information.
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