The Olympus series of ICs is the industry’s smallest
and robust integrated system protection solutions. The
MAX17612A/MAX17612B/MAX17612C adjustable overvoltage
and overcurrent protection devices are ideal to
protect systems against positive and negative input voltage
faults up to +60V and -65V, and feature low 1.42Ω
(typ) RON FETs.
The adjustable input overvoltage protection range is 5.5V
to 60V and the adjustable input undervoltage protection
range is 4.5V to 59V. The input overvoltage-lockout
(OVLO) and undervoltage-lockout (UVLO) thresholds are
set using external resistors. Additionally, the devices offer
an internal input undervoltage threshold at 4.2V (typ).
The devices feature programmable current-limit protection
up to 250mA; hence, controlling the inrush current at
startup while charging high capacitances at the output.
Current-limit threshold is programmed by connecting
a resistor from the SETI pin to GND. When the device
current reaches the programmed threshold, the device
prevents further increases in current by modulating the
FET resistance. The devices can be programmed to
behave in three different ways under current-limit condition:
Autoretry, Continous, or Latch-off modes. The
voltage appearing on the SETI pin is proportional to the
instantaneous current flowing through the device and is
read by an ADC.
MAX17612A and MAX17612C block current flowing
in the reverse direction (i.e., from OUT to IN) whereas
MAX17612B allows current flow in the reverse direction.
The devices feature thermal shutdown protection against
excessive power dissipation.
The devices are available in a small, 10-pin (3mm x 3mm)
TDFN-EP package. The devices operate over the -40°C
to +125°C extended temperature range.
Applications
- Condition Monitoring
- Factory Sensors
- Industrial Applications such as PLC, Network-Control Modules, Battery-Operated Modules
- Process Instrumentation
- Sensor Systems
- Weighing and Batching Systems
