The LTM9100 µModule is an all-in-one
isolated Anyside Switch controller that protects and monitors high voltage DC power
supplies up to 1,000 Vdc. The controller is used by high voltage power supplies
used in industrial, datacom, avionic and medical applications that require a
controlled turn-on, with isolation needed for control circuit protection,
operator safety and breaking ground paths. The device wraps all the needed
functionality, including isolated power and digital telemetry, in a compact BGA


galvanic isolation barrier inside the LTM9100 separates the digital interface
from the switch controller, driving an external n-channel MOSFET or IGBT
switch. To guarantee a robust isolation barrier, the controller is
production-tested to 6 kVRMS and will be recognized by the component-level
UL 1577 standard, saving months of certification time for the end equipment
manufacturer. Isolated digital measurements of load current, bus voltage and
temperature are accessed via the I2C/SMBus interface, enabling power
and energy monitoring of the high voltage bus.





Due to its
isolated nature, the switch controller is easily configured for high side, low
side (ground return) and floating applications. Inrush current is minimized by
soft-starting the load, and the supply is protected from overload and
short-circuits with a current-limited circuit breaker. The LTM9100 controls
inrush current in hot-swappable cards, AC transformers, motor drives and
inductive loads. Adjustable undervoltage and overvoltage lockout thresholds
ensure that the load operates only when the input supply is in its valid range.
Specified over the −40o to +105oC temperature range, the LTM9100
is offered in a 22 x 9 x 5.16 mm BGA package. For more information, visit