Hello. Welcome to Futurlec.
The ELECTRONIC COMPONENTS Superstore.
To find the component your looking for, either search by Part Number or visit the relative department.
Linear Technology Releases Bidirectional Electronic Circuit Breaker
Fast Acting Circuit Breaker provides protection against Current and Voltage Faults
Linear Technology has released the LTC4368, a circuit protection controller ensuring safe voltage and
current levels for 2.5V to 60V electronics in battery-powered automotive, industrial and portable systems.
The LTC4368 replaces fuses, transient voltage suppressors and discrete circuitry, enabling a compact and
comprehensive solution for shielding electronics from damaging overcurrent and over-, under- and reverse-voltage conditions.
The LTC4368 controls back-to-back N-channel MOSFETs to provide a low loss current path during normal operation,
turning them off for overcurrent faults in the forward or reverse direction. The LTC4368-1 circuit breaker
provides symmetric forward and reverse current thresholds to protect batteries from excessive charge and
discharge currents. The LTC4368-2 circuit breaker trips off when reverse current is detected to
prevent backfeeding and hold up the output.
The LTC4368 quickly disconnects the load from input voltages exceeding an adjustable and
precise overvoltage threshold. Adjustable undervoltage lockout disables operation for low input voltages,
avoiding deeply discharged batteries. Reverse supply protection isolates the load from batteries inserted with
incorrect polarity, eliminating a diode in the power path. The eliminated diode drop and the 2.5V operation provide
sufficient margin for riding through automotive cold crank conditions. Device current consumption is just 80µA in
normal operation and 5µA in shutdown mode, prolonging battery run and standby time.
The LTC4368 also controls inrush current while hot plugging a circuit board’s power supply.
The LTC4368 is available in two options: the LTC4368-1 provides a 50mV reverse circuit breaker sense threshold,
whereas the LTC4368-2 has a 3mV reverse threshold. After an overcurrent fault, a pin configuration determines
if the MOSFETs are latched off or turned on after a delay. Specified over the 0°C to 70°C commercial,
-40°C to 85°C industrial, and -40°C to 125°C automotive temperature ranges,
the LTC4368 is offered in 10-pin MSOP and 3mm x 3mm DFN packages.
Key Features of the LTC4368
- Protects Against Overcurrent, Reverse Current, Overvoltage, Undervoltage, Reverse Input
- 2.5V to 60V Operating Range
- −40V to 100V Protection Range
- Bidirectional Electronic Circuit Breaker (ECB)
- 50mV Forward Sense Threshold
- 50mV Reverse Sense Threshold (LTC4368-1)
- 3mV Reverse Sense Threshold (LTC4368-2)
- Adjustable, ±1.5% Accurate Undervoltage and Overvoltage Thresholds
- Low Quiescent Current: 80µA Operating, 5µA Shutdown
- Pin-Selectable Overcurrent Auto-Retry Timer or Latchoff
- Hot Swappable Supply Input
- -40°C to 125°C Operating Temperature Range
The company's Web site address is www.linear.com.
[Reprinted with kind permission from Linear Technology - Release Date: 2nd March, 2017]