Addresses thermal issues and space constraints in automotive matrix lighting and adaptive driving beam LED applications

By Alex Pluemer, contributing writer

Maxim
Integrated Products, Inc.
has developed a 12-switch matrix manager that
offers automotive designers greater flexibility and smaller solution sizes
while boasting the lowest internal switch resistance on the market, according
to the company. The MAX20092 is optimized for
high-performance automotive lighting and adaptive
driving beam LED applications.

The MAX20092 can
drive LED currents of up to 1.5 A and features 12 integrated switches that
can manage LEDs in string voltages up to 56 V while offering an integrated
MOSFET on resistance (RDS_ON) of 70 mΩ, a figure that Maxim claims is
65% lower than its nearest competitors can provide.

In conjunction
with the release of the MAX20092, Maxim also announced the availability of two
dual-channel, synchronous buck high-brightness LED controllers (the MAX20096 and MAX20097) that work with the
MAX20092. These controllers help mitigate electromagnetic interference and deliver
ultra-fast transient response with near-fixed frequency thanks to Maxim’s
proprietary average current mode control scheme.

Key features of
the MAX20092 include:

  • Flexibility: As many as 27 MAX20092
    devices can be used in parallel without the need to daisy-chain them together,
    allowing designers to manage up to 324 separate LEDs in a variety of
    configurations.
  • Safety: Advanced fault protection and
    management features allow for open, short, and open-trace LED detection.
  • Integration: By combining features
    that typically require several components to adequately replicate, the MAX20092
    reduces the amount of physical space used in a design while also reducing cost.

The
MAX20092 (5 × 5-mm TQFN package) is priced at $2.93 each (in quantities of
1,000+, FOB USA). An evaluation kit is available and
includes an LED adapter board, matrix manager board, and graphical user
interface. The adapter board features Osram Opto
Semiconductors’ Oslon Compact PL, KW CELNM1.TG, LED components, which are
suitable for adaptive matrix-style headlights, said Maxim.